東北大学研究者紹介

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顔写真

カワバタ　コウスケ

川畑　公輔

Kohsuke Kawabata

所属

大学院理学研究科　化学専攻　境界領域化学講座（有機化学第二研究室）

職名

准教授

学位

博士（工学）（筑波大学）

researchmap

https://researchmap.jp/kkawabata

J-GLOBAL ID

201801008009195032

経歴 7

2024年4月～継続中

東北大学　大学院理学研究科化学専攻　准教授
2017年8月～継続中

理化学研究所　創発物性科学研究センター　客員研究員
2017年8月～継続中

東北大学　大学院理学研究科化学専攻　助教
2017年2月～ 2017年7月

理化学研究所　創発物性科学研究センター　研究員
2015年2月～ 2017年1月

Yale University　Department of Chemical and Environmental Engineering　日本学術振興会海外特別研究員
2013年4月～ 2015年1月

理化学研究所　創発物性科学研究センター　特別研究員
2010年4月～ 2013年3月

筑波大学　大学院数理物質科学研究科　日本学術振興会特別研究員 (DC1)

︎全件表示 ︎最初の5件までを表示

学歴 2

筑波大学　大学院数理物質科学研究科　物性・分子工学専攻

2008年4月～ 2013年3月
筑波大学　第三学群工学基礎学類　物質・分子工学主専攻

2004年4月～ 2008年3月

所属学協会 1

日本化学会

研究キーワード 5

液晶
有機半導体
π共役系高分子
有機機能材料化学
有機エレクトロニクス

研究分野 2

ナノテク・材料 / 機能物性化学 /
ナノテク・材料 / 有機機能材料 /

受賞 7

若い世代の特別講演賞

2026年3月　日本化学会
令和3年度花王科学奨励賞

2021年6月　花王芸術・科学財団
The Ninth International Forum on Chemistry of Functional Organic Chemicals (IFOC-9) Best Poster Award

2018年11月
優秀講演賞（学術）

2018年3月　日本化学会
CSJ化学フェスタ最優秀ポスター賞

2012年10月　日本化学会
Journal of Materials Chemistry poster prize

2012年7月　ICSM2012 (Royal Society of Chemistry)
繊維学会年次大会若手ポスター賞

2011年6月　繊維学会

︎全件表示 ︎最初の5件までを表示

論文 79

Significant decrease in the ionization energy of dinaphtho[2,3- b :2′,3′- f ]thieno[3,2- b ]thiophene (DNTT) solid induced by a pinacolborane group

Kazuo Takimiya, Sayaka Usui, Ryota Hanaki, Kirill Bulgarevich, Kohsuke Kawabata, Kyohei Nakano, Keisuke Tajima

Materials Horizons　2026年
出版者・発行元： Royal Society of Chemistry (RSC)
DOI： 10.1039/d5mh01969a 　

ISSN：2051-6347

eISSN：2051-6355

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A pinacolborane (Bpin) group attached to dinaphtho[2,3- b :2′,3′- f ]thieno[3,2- b ]thiophene (DNTT) significantly reduced the ionization energy of the DNTT solid via reducing the vacuum level, leading to enhancing the carrier density by air-oxidation.
Extension of the π-conjugated core of methylchalcogenolated polycyclic aromatic hydrocarbons: synthesis and characterization of 1,4,7,10-tetrakis(methylthio)- and tetramethoxy-coronene. 国際誌査読有り

Prasanta Pal, Kirill Bulgarevich, Ryota Hanaki, Kohsuke Kawabata, Kazuo Takimiya

Chemical science　16　(34)　15368-15377　2025年8月27日

DOI： 10.1039/d5sc03215f 　

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Controlling the crystal structures of polycyclic aromatic hydrocarbons (PAHs) by regioselective methyl chalcogenolation is an effective strategy for realizing superior molecular semiconductors showing ultrahigh mobility, as exemplified by methylthiolated pyrene and peropyrene. Following the strategy, we designed and synthesized 1,4,7,10-tetrakis(methylthio)coronene (MT-coronene) and 1,4,7,10-tetramethoxycoronene (MO-coronene) as potential candidates for high-performance molecular semiconductors. Since the coronene core is highly symmetric, the regioselective functionalization at the 1, 4, 7, and 10-positions seemed to be challenging, and thus, we tested two strategies for constructing such regio-selectively functionalized coronene derivatives: one was the direct functionalization of the parent coronene via the iridium-catalyzed borylation reaction, and the other was the stepwise construction of the coronene core with functionalized naphthalene derivatives. Interestingly, the former was suitable for the synthesis of MT-coronene, whereas the latter was suitable for MO-coronene. The crystal structures of MT- and MO-coronene were significantly different from the γ-structure of their parent and were classified into the brickwork and the sandwich herringbone structure, respectively. In accordance with the brickwork crystal structures with isotropic but small intermolecular HOMO overlaps, the MT-coronene-based single-crystal field-effect transistors (SC-FETs) showed decent transistor responses with a carrier mobility of up to 0.5 cm2 V-1 s-1. On the other hand, the SC-FETs of MO-coronene, the solid-state electronic structure of which was zero-dimensional due to the sandwich herringbone structure, were far inferior to those of MT-coronene. Based on the crystal structures and theoretical calculations on MT- and MO-coronene, we analyzed the tendency of the intermolecular interactions and intermolecular HOMO overlaps in the solid state, which explains the performances of the coronene system as molecular semiconductors. Furthermore, we compared the solid-state structures of a series of methylthiolated PAHs, pyrene, perylene, peropyrene, and coronene, to determine the differences in their performances as molecular semiconductors, which gave us new insights into the relationship between the molecular structure, packing, and electronic structure in the solid state, providing perspectives for superior molecular semiconductors.
3-Dicyanomethylene-Substituted Thienothiophenes as the Terminal Units in Non-Fullerene Electron Acceptor Molecules for Organic Photovoltaics. 国際誌査読有り

Kensuke Shibahashi, Masato Nakamura, Kohsuke Kawabata, Kazuo Takimiya

Chemistry, an Asian journal　20　(16)　e00524　2025年8月

DOI： 10.1002/asia.202500524 　

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A series of dicyanomethylene-substituted thieno[3,2-b]- and thieno[2,3-b]-thiophenes and their α-halogenated derivatives (CNTTs) were developed as electron-withdrawing terminal units of non-fullerene acceptors (NFAs) for bulk heterojunction organic photovoltaics (OPVs). The series of CNTTs was combined with a [1,2,5]thiadiazolo[3,4-e]thieno[2'',3'':4',5']thieno[2',3':4,5]pyrrolo[3,2-g]thieno[2',3':4,5]thieno[3,2-b]indole (BTP) unit, the electron-donating core of Y6, a representative NFA, to afford a series of NFAs (BTP-CNTTs). The BTP-CNTTs, particularly the ones with α-chlorinated or brominated CNTT units, exhibit longer absorption wavelengths than that of Y6 and have low-lying LUMO energy levels comparable to that of Y6. Bulk heterojunction OPV devices based on the BTP-CNTTs blended with a representative donor polymer, PBDB-T, exhibited power conversion efficiencies of over 10% under AM1.5 irradiation. These results suggest that the CNTTs are good candidates as electron acceptor building units for NFAs or n-type organic semiconductors.
Isoelectronic Substitution of a High‐performance Organic Semiconductor with Selenium Atoms: Synthesis and Characterization of Methylthiolated Dibenzo[cd,gh][2,5]diselenapentalene 査読有り

Kazuo Takimiya, Kamon Sahara, Masashi Inoue, Kirill Bulgarevich, Kohsuke Kawabata

Asian Journal of Organic Chemistry　14　(5)　2025年5月5日
出版者・発行元： Wiley
DOI： 10.1002/ajoc.202500173 　

ISSN：2193-5807

eISSN：2193-5815

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Abstract A selenium variant of one of the best molecular semiconductors, 1,3,6,8‐tetrakis(methylthio)pyrene (MT‐pyrene), namely 1,3,5,7‐tetrakis(methylthio)dibenzo[cd,gh][2,5]diselenapentalene (1), was designed, synthesized, and fully characterized through single‐crystal X‐ray analysis and single‐crystal field‐effect transistors. Although the crystal structure of 1 was a brickwork‐related structure similar to that of MT‐pyrene, the transport properties of 1 were far inferior to that of MT‐pyrene. This is attributed to subtle differences in the crystal structure, where the large displacement along the molecular short‐axis direction diminishes the efficient two‐dimensional overlap of HOMO. Since such displacement can be caused by steric congestion of three chalcogen atoms at both sides of 1, two from the methylthio group and one from the core, we also synthesized 1,5‐bis(methylthio)dibenzo[cd,gh][2,5]diselenapentalene (2). However, 2 gave a less intermolecularly interactive crystal structure or one‐dimensional anisotropic structure, which were also not promising as molecular semiconductors, judging from the calculated electronic structures in the solid state. As the selenium‐containing core, dibenzo[cd,gh][2,5]diselenapentalene, has an isoelectronic molecular structure with pyrene and a smaller reorganization energy than pyrene, it is expected to be a promising π‐conjugated structure as organic semiconductors. However, methylthiolation was concluded not to be a suitable molecular‐design strategy to bring out the potential of the core.
Core- versus End-Alkylation: Tailoring Solid-State Structures and Properties of Near-Infrared-Absorbing Organic Semiconductors Based on Naphthodithiophenediones 査読有り

Kohsuke Kawabata, Kiyohito Mashimo, Kazuo Takimiya

Chemistry of Materials　2024年12月4日
出版者・発行元： American Chemical Society (ACS)
DOI： 10.1021/acs.chemmater.4c02436 　

ISSN：0897-4756

eISSN：1520-5002
Quinoidal π-extension of dipyranylidene derivatives: towards efficient dopants for n-type organic semiconductors 査読有り

Takaya Matsuo, Kohsuke Kawabata, Kazuo Takimiya

Organic Chemistry Frontiers　11　(17)　4682-4688　2024年7月3日

DOI： 10.1039/d4qo00961d 　

ISSN：2052-4110

eISSN：2052-4129
A Novel N-Type Molecular Dopant With a Closed-Shell Electronic Structure Applicable to the Vacuum-Deposition Process. 国際誌査読有り

Takaya Matsuo, Kohsuke Kawabata, Kazuo Takimiya

Advanced materials (Deerfield Beach, Fla.)　36　(15)　e2311047　2024年4月

DOI： 10.1002/adma.202311047 　

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Rational design, synthesis, and characterization of a new efficient versatile n-type dopant with a closed-shell electronic structure are described. By employing the tetraphenyl-dipyranylidene (DP0) framework with two 7π-electron systems modified with N,N-dimethylamino groups as the strong electron-donating substituent, 2,2',6,6'-tetrakis[4-(dimethylamino)phenyl]-4,4'-dipyranylidene (DP7), a closed-shell molecule with an extremely high-lying energy level of the highest occupied molecular orbital, close to 4.0 eV below the vacuum level, is successfully developed. Thanks to its thermal stability, DP7 is applicable to vacuum deposition, which allows utilization of DP7 in bulk doping for the development of n-type organic thermoelectric materials and contact doping for reducing contact resistance in n-type organic field-effect transistors. As vacuum-deposition processable n-type dopants are very limited, DP7 stands out as a useful n-type dopant, particularly for the latter purpose.
Crystal-Structure Control of Molecular Semiconductors by Methylthiolation: Toward Ultrahigh Mobility. 国際誌査読有り

Kazuo Takimiya, Kirill Bulgarevich, Kohsuke Kawabata

Accounts of chemical research　57　(6)　884-894　2024年3月19日

DOI： 10.1021/acs.accounts.3c00756 　

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ConspectusThe crystal structure of organic semiconductors has been regarded as one of the crucial factors for realizing high-performance electronic devices, such as organic field-effect transistors. However, although the control of crystal structures of organic semiconductors has been examined in the last two decades of intensive efforts of the development of organic semiconductors, active measures to control crystal structures enabling high carrier mobility are still limited. In 2016, our research group noticed that regioselective methylthiolation could provide a selective crystal structure change from an ordinary herringbone structure to a pitched π-stacking structure, similar to the crystal structure of rubrene, in the benzo[1,2-b:4,5-b']dithiophene (BDT) system. Following this serendipitous finding, our group systematically investigated the relationship between the molecular and crystal structures of a range of methylthiolated aromatic and heteroaromatic compounds.This Account provides a comprehensive overview of our research efforts and advancements in the development of methylthiolated small-molecule-based organic semiconductors (molecular semiconductors). We first describe the outline of the past development of molecular semiconductors, focusing on the types of crystal structures of high-performance molecular semiconductors. Then, we describe our findings on the drastic crystal structure change in the BDT system upon methylthiolation, detailing the causes of the change in terms of the intermolecular contacts and intermolecular interaction energies. This is followed by the confirmation of the generality of the crystal-structure change by methylthiolation of a series of acene and heteroacenes, where the herringbone structure in the parent system is unexceptionally transformed into the pitched π-stacking structure, a promising crystal structure for high-mobility molecular semiconductors well exemplified by the prototypical molecular semiconductor, rubrene. In fact, the methylthiolated anthradithiophene afforded comparable high mobility to rubrene in single-crystal field-effect transistors. Then, we demonstrate that the sandwich herringbone structures of peri-condensed polycyclic aromatic hydrocarbons, including pyrene, perylene, and peropyrene, change into brickwork crystal structures upon methylthiolation and that, among these compounds, very promising molecular semiconductors, methylthiolated pyrene and peropyrene, showing ultrahigh mobility of 30 cm2 V s-1, are realized.Through the studies, by gaining insights into the underlying mechanisms driving the crystal structure changes, we lay a strong foundation for tackling challenges related to controlling the crystal structures and developing high-performance molecular semiconductors. This will be a distinct approach from the past activities in the development of molecular semiconductors that mainly focused on molecules themselves, including their synthesis, properties, and characterization. We thus anticipate that our findings and the present Account will open the door to a new era of the development of molecular semiconductors.
Quinoidal Acenedichalcogenophenediones for Near-Infrared-Absorbing Organic Semiconductors: Effects of Chalcogen Atom Substitution on the Physicochemical and Carrier Transport Properties 査読有り

Kohsuke Kawabata, Kazuo Takimiya

CHEMISTRY OF MATERIALS　35　(18)　7628-7642　2023年9月

DOI： 10.1021/acs.chemmater.3c01350 　

ISSN：0897-4756

eISSN：1520-5002
Methylthiolation of Acenes: Change of Crystal Structure from Herringbone to Rubrene-like Pitched & pi;-Stacking Structure 査読有り

Kiseki Kanazawa, Kirill Bulgarevich, Kohsuke Kawabata, Kazuo Takimiya

CRYSTAL GROWTH & DESIGN　23　(8)　5941-5949　2023年7月

DOI： 10.1021/acs.cgd.3c00525 　

ISSN：1528-7483

eISSN：1528-7505
Uncovered Effects of thieno[2,3-b]thiophene Substructure in a Tetrathienoacene Backbone: Reorganization Energy and Intermolecular Interaction 査読有り

Kiseki Kanazawa, Kirill Bulgarevich, Kohsuke Kawabata, Kazuo Takimiya

CHEMISTRY OF MATERIALS　2022年12月

DOI： 10.1021/acs.chemmater.2c03160 　

ISSN：0897-4756

eISSN：1520-5002
What Defines a Crystal Structure? Effects of Chalcogen Atoms in 3,7-Bis(methylchalcogeno)benzo[1,2-b:4,5-b ']dichalcogenophene-Based Organic Semiconductors(dagger) 査読有り

Kazuo Takimiya, Kirill Bulgarevich, Kamon Sahara, Kiseki Kanazawa, Hiroyuki Takenaka, Kohsuke Kawabata

CHINESE JOURNAL OF CHEMISTRY　40　(21)　2546-2558　2022年11月

DOI： 10.1002/cjoc.202200302 　

ISSN：1001-604X

eISSN：1614-7065
"Heavy-atom effects" in the parent [1]benzochalcogenopheno[3,2-b][1]benzochalcogenophene system (vol 8, pg 15119, 2020) 査読有り

Chengyuan Wang, Mamatimin Abbas, Guillaume Wantz, Kohsuke Kawabata, Kazuo Takimiya

JOURNAL OF MATERIALS CHEMISTRY C　10　(32)　11810-11810　2022年8月

DOI： 10.1039/d2tc90146c 　

ISSN：2050-7526

eISSN：2050-7534
Effects of Conformation on Doping Efficiency in pi-Extended Bipyranylidene Molecules: Relationship between Molecular Structure and Electron-Doping Ability for Developing n-Type Organic Thermoelectrics

Takaya Matsuo, Kohsuke Kawabata, Kazuo Takimiya

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN　95　(7)　1047-1053　2022年7月

DOI： 10.1246/bcsj.20220124 　

ISSN：0009-2673

eISSN：1348-0634
Bandlike versus Temperature-IndependentCarrier Transport in IsomericDiphenyldinaphtho[2,3-b:2 ',3 '-f]thieno[3,2-b]thiophenes 査読有り

Kazuo Takimiya, Kirill Bulgarevich, Shingo Horiuchi, Aoi Sato, Kohsuke Kawabata

ACS MATERIALS LETTERS　4　(4)　675-681　2022年4月

DOI： 10.1021/acsmaterialslett.2c00084 　

eISSN：2639-4979
Packing structures of (trialkylsilyl)ethynyl-substituted dinaphtho[2,3-b:2 ',3 '-f]thieno[3,2-b]thiophenes (DNTTs): effects of substituents on crystal structures and transport properties 査読有り

Kazuo Takimiya, Sayaka Usui, Aoi Sato, Kiseki Kanazawa, Kohsuke Kawabata

JOURNAL OF MATERIALS CHEMISTRY C　10　(7)　2775-2782　2022年2月

DOI： 10.1039/d1tc04312a 　

ISSN：2050-7526

eISSN：2050-7534
Enantiopure 2-(2-ethylhexyl)dinaphtho[2,3-b:2 ',3 '-f]thieno[3,2-b]thiophenes: synthesis, single-crystal structure and a surprising lack of influence of stereoisomerism on thin-film structure and electronic properties 査読有り

Kenta Sumitomo, Yuta Sudo, Kiseki Kanazawa, Kohsuke Kawabata, Kazuo Takimiya

MATERIALS HORIZONS　9　(1)　444-451　2022年1月

DOI： 10.1039/d1mh01119g 　

ISSN：2051-6347

eISSN：2051-6355
Quinoid-Aromatic Resonance for Very Small Optical Energy Gaps in Small-Molecule Organic Semiconductors: A Naphthodithiophenedione-oligothiophene Triad System 査読有り

Kohsuke Kawabata, Kazuo Takimiya

CHEMISTRY-A EUROPEAN JOURNAL　27　(63)　15660-15670　2021年11月

DOI： 10.1002/chem.202102663 　

ISSN：0947-6539

eISSN：1521-3765
Highly Electron-Donating Bipyranylidene Derivatives: Potential n-Type Dopants for Organic Thermoelectrics 査読有り

Takaya Matsuo, Kohsuke Kawabata, Kazuo Takimiya

ADVANCED ENERGY AND SUSTAINABILITY RESEARCH　2　(11)　2021年11月

DOI： 10.1002/aesr.202100084 　

ISSN：2699-9412
"Manipulation" of Crystal Structure by Methylthiolation Enabling Ultrahigh Mobility in a Pyrene-Based Molecular Semiconductor 査読有り

Kazuo Takimiya, Kirill Bulgarevich, Mamatimin Abbas, Shingo Horiuchi, Takuya Ogaki, Kohsuke Kawabata, Abduleziz Ablat

ADVANCED MATERIALS　33　(32)　2021年8月

DOI： 10.1002/adma.202102914 　

ISSN：0935-9648

eISSN：1521-4095
Crystal Structures of beta-Methylchalcogenated Tetrathienoacenes: From One-Dimensional pi-Stacking to Sandwich Pitched pi-Stacking Structure 査読有り

Kazuo Takimiya, Kiseki Kanazawa, Kohsuke Kawabata

CRYSTAL GROWTH & DESIGN　21　(7)　4055-4063　2021年7月

DOI： 10.1021/acs.cgd.1c00347 　

ISSN：1528-7483

eISSN：1528-7505
Nanoscale Thickness Control of Nanoporous Films Derived from Directionally Photopolymerized Mesophases

Omar Q. Imran, Na Kyung Kim, Lauren N. Bodkin, Gregory E. Dwulet, Xunda Feng, Kohsuke Kawabata, Menachem Elimelech, Douglas L. Gin, Chinedum O. Osuji

Advanced Materials Interfaces　8　(5)　2001977-2001977　2021年3月
出版者・発行元： Wiley
DOI： 10.1002/admi.202001977 　

ISSN：2196-7350

eISSN：2196-7350
Relating Selectivity and Separation Performance of Lamellar Two-Dimensional Molybdenum Disulfide (MoS2) Membranes to Nanosheet Stacking Behavior

Xinglin Lu, Uri R. Gabinet, Cody L. Ritt, Xunda Feng, Akshay Deshmukh, Kohsuke Kawabata, Masashi Kaneda, Sara M. Hashmi, Chinedum O. Osuji, Menachem Elimelech

Environmental Science & Technology　54　(15)　9640-9651　2020年8月4日
出版者・発行元： American Chemical Society (ACS)
DOI： 10.1021/acs.est.0c02364 　

ISSN：0013-936X

eISSN：1520-5851
Carbonyl-Terminated Quinoidal Oligothiophenes as p-Type Organic Semiconductors

Takato Asoh, Kohsuke Kawabata, Kazuo Takimiya

Materials　13　(13)　3020-3020　2020年7月6日
出版者・発行元： MDPI AG
DOI： 10.3390/ma13133020 　

eISSN：1996-1944

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A series of quinoidal oligothiophenes terminated with carbonyl groups (nTDs, n = 2–4) are studied as p-type organic semiconductors for the active materials in organic field-effect transistors (OFETs) both by the theoretical and experimental approaches. The theoretical calculations clearly show their high-lying highest occupied molecular orbital (HOMO) energy levels (EHOMOs), small reorganization energies for hole transport (λholes), and large contribution of sulfur atoms to HOMOs, all of which are desirable for p-type organic semiconductors. Thus, we synthesized nTDs from the corresponding aromatic oligothiophene precursors and then evaluated their physicochemical properties and structural properties. These experimental evaluations of nTDs nicely proved the theoretical predictions, and the largest 4TDs in the series (4,4′′′-dihexyl- and 3′,4,4″,4′′′-tetrahexyl-5H,5′′′H-[2,2′:5′,2″:5″,2′′′-quaterthiophene]-5,5′′′-dione) can afford solution-processed OFETs showing unipolar p-type behaviors and hole mobility as high as 0.026 cm2 V−1 s−1.
Crystal Structures of Dimethoxyanthracens: A Clue to a Rational Design of Packing Structures of π‐Conjugated Molecules

Kazuo Takimiya, Takuya Ogaki, Chengyuan Wang, Kohsuke Kawabata

Chemistry – An Asian Journal　15　(6)　915-919　2020年3月16日
出版者・発行元： Wiley
DOI： 10.1002/asia.201901756 　

ISSN：1861-4728

eISSN：1861-471X
Synthesis of Soluble Dinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophene (DNTT) Derivatives: One-Step Functionalization of 2-Bromo-DNTT

Kohsuke Kawabata, Sayaka Usui, Kazuo Takimiya

The Journal of Organic Chemistry　85　(1)　195-206　2020年1月3日
出版者・発行元： American Chemical Society (ACS)
DOI： 10.1021/acs.joc.9b02585 　

ISSN：0022-3263

eISSN：1520-6904
“Disrupt and induce” intermolecular interactions to rationally design organic semiconductor crystals: from herringbone to rubrene-like pitched π-stacking

Chengyuan Wang, Daisuke Hashizume, Masahiro Nakano, Takuya Ogaki, Hiroyuki Takenaka, Kohsuke Kawabata, Kazuo Takimiya

Chemical Science　11　(6)　1573-1580　2020年
出版者・発行元： Royal Society of Chemistry (RSC)
DOI： 10.1039/c9sc05902d 　

ISSN：2041-6520

eISSN：2041-6539

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<p>The rational design of organic semiconductor crystals is realized by β-methylthionation of acenedithiophenes through manipulating intermolecular interactions in a “disrupt and induce” manner.</p>
“Heavy-atom effects” in the parent [1]benzochalcogenopheno[3,2-b][1]benzochalcogenophene system

Chengyuan Wang, Mamatimin Abbas, Guillaume Wantz, Kohsuke Kawabata, Kazuo Takimiya

Journal of Materials Chemistry C　8　(43)　15119-15127　2020年
出版者・発行元： Royal Society of Chemistry (RSC)
DOI： 10.1039/d0tc01408g 　

ISSN：2050-7526

eISSN：2050-7534

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<p>Effects of the chalcogen atoms in [1]benzochalcogenopheno[3,2-<italic>b</italic>][1]benzochalcogenophenes (BXBXs), the key π-conjugated core structures in the development of superior organic semiconductors, are investigated.</p>
Selenium-Substituted beta-Methylthiobenzo[1,2-b:4,5-b ']dithiophenes: Synthesis, Packing Structure, and Transport Properties

Takenaka Hiroyuki, Ogaki Takuya, Wang Chengyuan, Kawabata Kohsuke, Takimiya Kazuo

CHEMISTRY OF MATERIALS　31　(17)　6696-6705　2019年9月10日

DOI： 10.1021/acs.chemmater.9b01187 　

ISSN：0897-4756
Precise nanofiltration in a fouling-resistant self-assembled membrane with water-continuous transport pathways 査読有り

Feng Xunda, Imran Qaboos, Zhang Yizhou, Sixdenier Lucas, Lu Xinglin, Kaufman Gilad, Gabinet Uri, Kawabata Kohsuke, Elimelech Menachem, Osuji Chinedum O

SCIENCE ADVANCES　5　(8)　2019年8月

DOI： 10.1126/sciadv.aav9308 　

ISSN：2375-2548
Single crystal texture by directed molecular self-assembly along dual axes. 査読有り

Feng X, Kawabata K, Cowan MG, Dwulet GE, Toth K, Sixdenier L, Haji-Akbari A, Noble RD, Elimelech M, Gin DL, Osuji CO

Nature materials　2019年6月

DOI： 10.1038/s41563-019-0389-1 　

ISSN：1476-1122
Next-generation nanofiltration membranes based on aligned and bicontinuous self-assembled systems 査読有り

Osuji Chinedum, Feng Xunda, Imran Qaboos, Kawabata Kohsuke, Lu Xinglin, Sixdenier Lucas, Kaufman Gilad, Gabinet Uri, Elimelech Menachem

ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY　257　2019年3月31日

ISSN：0065-7727
Thienoquinoidal System: Promising Molecular Architecture for Optoelectronic Applications 招待有り査読有り

Kazuo Takimiya, Kohsuke Kawabata

Journal of Synthetic Organic Chemistry, Japan　76　(11)　1176-1184　2018年11月
Controlling orientational order in block copolymers using low-intensity magnetic fields 査読有り

Manesh Gopinadhan, Youngwoo Choo, Kohsuke Kawabata, Gilad Kaufman, Xunda Feng, Xiaojun Di, Yekaterina Rokhlenko, Lalit H. Mahajan, Dennis Ndaya, Rajeswari M. Kasi, Chinedum O. Osuji

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA　114　(45)　E9437-E9444　2017年11月

DOI： 10.1073/pnas.1712631114 　

ISSN：0027-8424
Polymer Nanosheets from Supramolecular Assemblies of Conjugated Linoleic Acid-High Surface Area Adsorbents from Renewable Materials 査読有り

Xunda Feng, Kohsuke Kawabata, Dylan M. Whang, Chinedum O. Osuji

LANGMUIR　33　(40)　10690-10697　2017年10月

DOI： 10.1021/acs.langmuir.7b02467 　

ISSN：0743-7463
Induction of Helical Structure by Sesamin, and Production of Oriented Helical Polymer with Liquid Crystal Magneto-Electrochemical Polymerization 査読有り

Jiuchao Dong, Shigeki Nimori, Kohsuke Kawabata, Hiromasa Goto

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY　55　(11)　1894-1899　2017年6月

DOI： 10.1002/pola.28560 　

ISSN：0887-624X

eISSN：1099-0518
Dithienyl Acenedithiophenediones as New -Extended Quinoidal Cores: Synthesis and Properties 査読有り

Kohsuke Kawabata, Itaru Osaka, Masanori Sawamoto, Jose L. Zafra, Paula Mayorga Burrezo, Juan Casado, Kazuo Takimiya

CHEMISTRY-A EUROPEAN JOURNAL　23　(19)　4579-4589　2017年4月

DOI： 10.1002/chem.201605104 　

ISSN：0947-6539

eISSN：1521-3765
Highly Selective Vertically Aligned Nanopores in Sustainably Derived Polymer Membranes by Molecular Templating 査読有り

Xunda Feng, Kohsuke Kawabata, Gilad Kaufman, Menachem Elimelech, Chinedum O. Osuji

ACS NANO　11　(4)　3911-3921　2017年4月

DOI： 10.1021/acsnano.7b00304 　

ISSN：1936-0851

eISSN：1936-086X
Effects of branching position of alkyl side chains on ordering structure and charge transport property in thienothiophenedione- and quinacridone-based semiconducting polymers 査読有り

Kohsuke Kawabata, Masahiko Saito, Noriko Takemura, Itaru Osaka, Kazuo Takimiya

POLYMER JOURNAL　49　(1)　169-176　2017年1月

DOI： 10.1038/pj.2016.103 　

ISSN：0032-3896

eISSN：1349-0540
Very Small Bandgap pi-Conjugated Polymers with Extended Thienoquinoids 査読有り

Kohsuke Kawabata, Masahiko Saito, Itaru Osaka, Kazuo Takimiya

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　138　(24)　7725-7732　2016年6月

DOI： 10.1021/jacs.6b03688 　

ISSN：0002-7863
A Poly(ter(3,4-ethylenedioxythiophene)) Showing Concentric-circle Morphology Prepared by Electrochemical Synthesis in Smectic A Liquid Crystal under Vertical Strong Magnetic Field 査読有り

Hiroki Hayashi, Kohsuke Kawabata, Shigeki Nimori, Hiromasa Goto

CHEMISTRY LETTERS　45　(2)　170-172　2016年2月

DOI： 10.1246/cl.151066 　

ISSN：0366-7022

eISSN：1348-0715
Synthesis and optical properties of poly(phenylenethiophene)s bearing conjugated side chains 査読有り

Hirotsugu Kawashima, Kohsuke Kawabata, Aohan Wang, Hiromasa Goto

DESIGNED MONOMERS AND POLYMERS　18　(7)　661-668　2015年10月

DOI： 10.1080/15685551.2015.1070498 　

ISSN：1385-772X

eISSN：1568-5551
Thienothiophene-2,5-Dione-Based Donor-Acceptor Polymers: Improved Synthesis and Influence of the Donor Units on Ambipolar Charge Transport Properties 査読有り

Kohsuke Kawabata, Itaru Osaka, Masahiro Nakano, Noriko Takemura, Tomoyuki Koganezawa, Kazuo Takimiya

ADVANCED ELECTRONIC MATERIALS　1　(6)　2015年6月

DOI： 10.1002/aelm.201500039 　

ISSN：2199-160X
Thiophene-based chiral small bandgap pi-conjugated polymers: synthesis and optical properties 査読有り

Aohan Wang, Kohsuke Kawabata, Hiromasa Goto

DESIGNED MONOMERS AND POLYMERS　18　(4)　360-366　2015年5月

DOI： 10.1080/15685551.2015.1012625 　

ISSN：1385-772X

eISSN：1568-5551
Synthesis, Properties, and Doping Behavior of Optically Active Polythiophenes Bearing a Bornyl Group 査読有り

Atsushi Matsumura, Kohsuke Kawabata, Hiromasa Goto

MACROMOLECULAR CHEMISTRY AND PHYSICS　216　(9)　931-938　2015年5月

DOI： 10.1002/macp.201400594 　

ISSN：1022-1352

eISSN：1521-3935
Intramolecular charge transfer (ICT) of a chiroptically active conjugated polymer showing green colour 査読有り

Hirotsugu Kawashima, Kohsuke Kawabata, Hiromasa Goto

JOURNAL OF MATERIALS CHEMISTRY C　3　(5)　1126-1133　2015年

DOI： 10.1039/c4tc02124j 　

ISSN：2050-7526

eISSN：2050-7534
Intramolecular charge transfer (ICT) of a chiroptically active conjugated polymer showing green colour (vol 3, pg 1126, 2015) 査読有り

Hirotsugu Kawashima, Kohsuke Kawabata, Hiromasa Goto

JOURNAL OF MATERIALS CHEMISTRY C　3　(5)　1142-1142　2015年

DOI： 10.1039/c5tc90019k 　

ISSN：2050-7526

eISSN：2050-7534
Synthesis and characterization of a novel donor-acceptor- donor chiral inducer and its application in electrochemical polymerization 査読有り

Jiuchao Dong, Kohsuke Kawabata, Hiromasa Goto

JOURNAL OF MATERIALS CHEMISTRY C　3　(9)　2024-2032　2015年

DOI： 10.1039/c4tc02489c 　

ISSN：2050-7526

eISSN：2050-7534
Water soluble polyaniline/polysaccharide composite: Polymerization, carbonization to yield carbon micro-bubbles 査読有り

Kuniharu Nakajima, Kohsuke Kawabata, Hiromasa Goto

SYNTHETIC METALS　194　47-51　2014年8月

DOI： 10.1016/j.synthmet.2014.04.015 　

ISSN：0379-6779
Catalysis direction selective asymmetric polymerization in chiral liquid crystal medium 査読有り

Tomokazu Iseki, Kohsuke Kawabata, Hirotsugu Kawashima, Hiromasa Goto

POLYMER　55　(1)　66-72　2014年1月

DOI： 10.1016/j.polymer.2013.12.009 　

ISSN：0032-3861

eISSN：1873-2291
Synthesis of chiral inducers having double stereogenic centers for electrochemical polymerization in cholesteric liquid crystal medium 査読有り

Tomokazu Iseki, Kohsuke Kawabata, Shigeki Nimori, Hiromasa Goto

SYNTHETIC METALS　187　217-223　2014年1月

DOI： 10.1016/j.synthmet.2013.11.017 　

ISSN：0379-6779
Synthesis and properties of a low-bandgap liquid crystalline pi-conjugated polymer 査読有り

Hiromasa Goto, Aohan Wang, Kohsuke Kawabata, Fan Yang

JOURNAL OF MATERIALS SCIENCE　48　(21)　7523-7532　2013年11月

DOI： 10.1007/s10853-013-7567-3 　

ISSN：0022-2461
Synthesis and characterisation of thieno[3,2-b]thiophene-based linear shaped liquid crystals 査読有り

Jiuchao Dong, Kohsuke Kawabata, Takahiro Seino, Fan Yang, Hiromasa Goto

LIQUID CRYSTALS　40　(11)　1455-1465　2013年11月

DOI： 10.1080/02678292.2013.835453 　

ISSN：0267-8292

eISSN：1366-5855
Mechanical orientation in thermotropic liquid crystal state and magnetic orientation in solvent evaporation process via lyotropic liquid crystal state of an amphotropic low-bandgap liquid-crystalline -conjugated polymer 査読有り

Hiromasa Goto, Aohan Wang, Shigeki Nimori, Kohsuke Kawabata

LIQUID CRYSTALS　40　(9)　1159-1166　2013年9月

DOI： 10.1080/02678292.2013.818168 　

ISSN：0267-8292

eISSN：1366-5855
Synthesis of a pyrimidine-based new chiral inducer for construction of cholesteric liquid crystal electrolyte solution and its electrochemical polymerization, and stimulated emission like interference 査読有り

Aohan Wang, Kohsuke Kawabata, Hirotsugu Kawashima, Hiromasa Goto

POLYMER　54　(15)　3821-3827　2013年7月

DOI： 10.1016/j.polymer.2013.04.053 　

ISSN：0032-3861

eISSN：1873-2291
Horizontal and Vertical Orientation of Polythiophenes by Electrochemical Polymerization in Magnetically Aligned Smectic Liquid Crystal 査読有り

Kohsuke Kawabata, Shigeki Nimori, Hiromasa Goto

ACS MACRO LETTERS　2　(7)　587-591　2013年7月

DOI： 10.1021/mz400213k 　

ISSN：2161-1653
Synthesis of polymers from chiral monomers in chiral liquid crystals 査読有り

Satoshi Ohkawa, Fan Yang, Kohsuke Kawabata, Hiromasa Goto

JOURNAL OF APPLIED POLYMER SCIENCE　128　(6)　3586-3591　2013年6月

DOI： 10.1002/app.38561 　

ISSN：0021-8995
Synthesis of Isothianaphthene (ITN) and 3,4-Ethylenedioxy-Thiophene (EDOT)-Based Low-Bandgap Liquid Crystalline Conjugated Polymers 査読有り

Aohan Wang, Kohsuke Kawabata, Hiromasa Goto

MATERIALS　6　(6)　2218-2228　2013年6月

DOI： 10.3390/ma6062218 　

ISSN：1996-1944

eISSN：1996-1944
Optical activity of heteroaromatic conjugated polymer films prepared by asymmetric electrochemical polymerization in cholesteric liquid crystals: Structural function for chiral induction 査読有り

Kohsuke Kawabata, Masaki Takeguchi, Hiromasa Goto

Macromolecules　46　(6)　2078-2091　2013年3月26日

DOI： 10.1021/ma400302j 　

ISSN：0024-9297
Small carbon forms from polyaniline/metal 査読有り

Hiromasa Goto, Atsushi Yokoo, Masaki Takeguchi, Kohsuke Kawabata

International Journal of Polymeric Materials and Polymeric Biomaterials　62　(8)　426-432　2013年3月22日

DOI： 10.1080/00914037.2012.721412 　

ISSN：0091-4037 1563-535X
Preparation of Phenylenevinylene Derivatives Having Fluorescence and Chiral Induction Function 査読有り

Hiromasa Goto, Kohsuke Kawabata

Journal of Dispersion Science and Technology　34　(3)　311-321　2013年3月

DOI： 10.1080/01932691.2012.666139 　

ISSN：0193-2691 1532-2351
Helical twisting power of three-ring chiral molecules and polymerization in cholesteric electrolyte solutions 査読有り

Hitoshi Hayashi, Aohan Wang, Kohsuke Kawabata, Hiromasa Goto

MATERIALS CHEMISTRY AND PHYSICS　137　(3)　816-824　2013年1月

DOI： 10.1016/j.matchemphys.2012.10.017 　

ISSN：0254-0584
A possibility for generation of two species of charge carriers along main-chain and side-chains for a pi-conjugated polymer 査読有り

Yuki Kudo, Kohsuke Kawabata, Hiromasa Goto

XXIST INTERNATIONAL SYMPOSIUM ON THE JAHN-TELLER EFFECT 2012　428　2013年

DOI： 10.1088/1742-6596/428/1/012006 　

ISSN：1742-6588
Dynamically Controllable Emission of Polymer Nanofibers: Electrofluorescence Chromism and Polarized Emission of Polycarbazole Derivatives 査読有り

Kohsuke Kawabata, Hiromasa Goto

CHEMISTRY-A EUROPEAN JOURNAL　18　(47)　15065-15072　2012年11月

DOI： 10.1002/chem.201201471 　

ISSN：0947-6539
Synthesis and optical properties of 1,1-binaphthyl-thiophene alternating copolymers with main chain chirality 査読有り

Kohsuke Kawabata, Hiromasa Goto

JOURNAL OF MATERIALS CHEMISTRY　22　(44)　23514-23524　2012年11月

DOI： 10.1039/c2jm35594a 　

ISSN：0959-9428

eISSN：1364-5501
Synthesis and double doping behavior of a poly(p-phenylenevinylene)s bearing conjugated side chains 査読有り

Hirotsugu Kawashima, Kohsuke Kawabata, Hiromasa Goto

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY　50　(8)　1530-1538　2012年4月

DOI： 10.1002/pola.25919 　

ISSN：0887-624X
Liquid Crystalline pi-Conjugated Copolymers Bearing a Pyrimidine Type Mesogenic Group. (vol 2, pg 22, 2009) 査読有り

Kohsuke Kawabata, Hiromasa Goto

MATERIALS　5　(1)　156-156　2012年1月

DOI： 10.3390/ma5010156 　

ISSN：1996-1944
Synthesis of a low-bandgap polymer bearing side groups containing phenoxy radicals 査読有り

Yu Innami, Rafael H. L. Kiebooms, Tamotsu Koyano, Masaaki Ichinohe, Satoshi Ohkawa, Kohsuke Kawabata, Masataka Kawamatsu, Kiyoto Matsuishi, Hiromasa Goto

JOURNAL OF MATERIALS SCIENCE　46　(20)　6556-6562　2011年10月

DOI： 10.1007/s10853-011-5602-9 　

ISSN：0022-2461
Light driven asymmetric polymerization: an approach for tele-control reaction 査読有り

Hiromasa Goto, Kohsuke Kawabata

POLYMER CHEMISTRY　2　(5)　1098-1106　2011年

DOI： 10.1039/c0py00396d 　

ISSN：1759-9954
Polymerization in Liquid Crystal Medium: Preparation of Polythiophene Derivatives Bearing a Bulky Pyrimidine Substituent 査読有り

Satoshi Ohkawa, Reina Ohta, Kohsuke Kawabata, Hiromasa Goto

POLYMERS　2　(4)　393-406　2010年12月

DOI： 10.3390/polym2040393 　

ISSN：2073-4360
Electrosynthesis of 2,7-linked polycarbazole derivatives to realize low-bandgap electroactive polymers 査読有り

Kohsuke Kawabata, Hiromasa Goto

SYNTHETIC METALS　160　(21-22)　2290-2298　2010年11月

DOI： 10.1016/j.synthmet.2010.08.023 　

ISSN：0379-6779
Electrochemical preparation of an electroactive polymer poly(dodecyloxy dibenzothiophene) (polyDDBTh) from hydroxyl dibenzothiophene (HDBTh) as a bioconverted monomer 査読有り

Hiromasa Goto, Yong-Soo Jeong, Kohsuke Kawabata, Masaki Takada, Takuya Kotanagi, Hideyuki Shigemori, Nobuhiko Nomura

JOURNAL OF APPLIED ELECTROCHEMISTRY　40　(1)　191-195　2010年1月

DOI： 10.1007/s10800-009-9994-z 　

ISSN：0021-891X
Uniaxially ordered conjugated polymer film prepared by electrochemical polymerization in a nematic liquid crystal with rubbing orientation method showing redox-driven tunable dichroism 査読有り

Kohsuke Kawabata, Hiroyuki Yoneyama, Hiromasa Goto

POLYMER CHEMISTRY　1　(10)　1606-1608　2010年

DOI： 10.1039/c0py00279h 　

ISSN：1759-9954
Periodic Structure in a Fluorene-based Polymer Prepared by Electrochemical Polymerization 査読有り

Kohsuke Kawabata, Hiromasa Goto

CHEMISTRY LETTERS　38　(7)　706-707　2009年7月

DOI： 10.1246/cl.2009.706 　

ISSN：0366-7022

eISSN：1348-0715
Liquid Crystalline pi-Conjugated Copolymers Bearing a Pyrimidine Type Mesogenic Group 査読有り

Kohsuke Kawabata, Hiromasa Goto

MATERIALS　2　(1)　22-37　2009年3月

DOI： 10.3390/ma2010022 　

ISSN：1996-1944
Preparation of Furan-Based Monomers and Asymmetric Electrochemical Polymerization in Cholesteric Liquid Crystals: Optical Activity and Selective Reflection 査読有り

Kohsuke Kawabata, Hiroyuki Yoneyama, Hiromasa Goto

MOLECULAR CRYSTALS AND LIQUID CRYSTALS　515　3-15　2009年

DOI： 10.1080/15421400902987636 　

ISSN：1542-1406
Visualization of nematic liquid crystal director by alignment of pi-conjugated polymer nanotubes 査読有り

Hiromasa Goto, Kohsuke Kawabata

MACROMOLECULES　41　(13)　4551-4554　2008年7月

DOI： 10.1021/ma800455v 　

ISSN：0024-9297
Preparation of iridescent-reflective poly(furan-co-phenylene)s by electrochemical polymerization in a cholesteric liquid crystal medium 査読有り

Hiroyuki Yoneyama, Kohsuke Kawabata, Akitsu Tsujimoto, Hiromasa Goto

ELECTROCHEMISTRY COMMUNICATIONS　10　(7)　965-969　2008年7月

DOI： 10.1016/j.elecom.2008.04.021 　

ISSN：1388-2481
Cholesteric liquid crystal inductive asymmetric polymerisation of thiophene monomers 査読有り

Hiromasa Goto, Fumihiro Togashi, Akitsu Tsujimoto, Reina Ohta, Kohsuke Kawabata

LIQUID CRYSTALS　35　(7)　847-856　2008年

DOI： 10.1080/02678290802227276 　

ISSN：0267-8292

︎全件表示 ︎最初の5件までを表示

産業財産権 6

ジピラニリデン化合物

瀧宮和男, 川畑公輔, 松尾崇也, 新見一樹

産業財産権の種類: 特許権
芳香族化合物の製造方法

瀧宮和男, 川畑公輔, 岩田智史, 前田健太郎, 貞光雄一

産業財産権の種類: 特許権
高分子化合物、該高分子化合物からなる有機半導体材料並びに該高分子化合物を有する有機半導体及び有機トランジスタ

川畑公輔, 尾坂格, 瀧宮和男

産業財産権の種類: 特許権
フェニルアルコキシ二置換アセチレンン系重合体

後藤博正, 工藤友紀, 川畑公輔

産業財産権の種類: 特許権
エレクトロ蛍光クロミズムを示す高分子ナノファイバー

後藤博正, 川畑公輔

産業財産権の種類: 特許権
ネマチック液晶電解液を用いた共役高分子膜の製造法と光学的異方性を有する共役高分子膜

川畑公輔, 後藤博正

産業財産権の種類: 特許権

︎全件表示 ︎最初の5件までを表示

共同研究・競争的資金等の研究課題 4

三方晶系極性有機結晶の構築とバルク光起電流効果デバイスへの応用

瀧宮和男, 川畑公輔, 中村優男

2025年6月27日～ 2028年3月31日
”結晶構造マニュピレーション”：ペリ縮合多環芳香族の高性能有機半導体化

瀧宮和男, 川畑公輔

2023年4月1日～ 2026年3月31日
近赤外有機半導体の創製

瀧宮和男, 川畑公輔, 大垣拓也, 澤本尚典

提供機関：Japan Society for the Promotion of Science

制度名：Grants-in-Aid for Scientific Research

研究種目：Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

研究機関：Tohoku University

2019年10月7日～ 2023年3月31日

詳細を見る詳細を閉じる

COVID-19の影響のため、今年度計画していたフランス・ボルドー大学での共同実験はすべて実施できなかったため、国内での材料合成とデバイス評価体制の構築に注力した。具体的には、川畑が中心となり、可溶性アセンジチオフェンジオン系材料の開発を実施し、ベンゾジカルコゲノフェノジオン（フラン、チオフェン、およびセレノフェン）系に加え、ナフトジチオフェンジオン系について周辺ドナー部位を順次変化させることで、近赤外吸収領域を制御しつつ、新材料を得ることに成功している。これらの新規材料の半導体特性は電界効果トランジスタ構造により評価されており、近赤外吸収のみならず比較的良好なキャリア輸送特性を持つことを確認している。これに加え、薄膜における分子凝集様式を変化させることで吸収領域の制御を行うことにもチャレンジし、キノイド骨格中央部に適切にアルキル基を導入することで、J会合体様の凝集が実現でき、比較的小さな分子であるにもかかわらず1000nmを超える長波長吸収を実現できることが明らかにできた。更に単結晶構造解析により、アルキル基がどのように分子集合体構造に影響を及ぼすのかも明らかにできており、本分子設計における構造化学的な意義を見出すだけでなく、さらなる長波長吸収の実現に向けて極めて有用な手法であることも確認している。一方、ナフトチオフェンジイミド系においては、澤本を中心に効率的合成法の開発を検討し、市販のナフタレンジイミド誘導体から効率的なチオフェン環構築法とCH活性化を経るカップリング反応によりオリゴマー半導体を効率的に合成する手法を確立できている。一方、太陽電池およびフォトディテクタ素子の作製・評価技術についてはフランス・ボルドー大チームと打ち合わせを進めており、特に太陽電池については新たに開発した近赤外吸収材料を用いて7%程度の光電変換効率が実現できることを確認している。
アセンジカルコゲノフェンジオン骨格を有する有機近赤外フォトディテクター材料の開発

川畑公輔

提供機関：Japan Society for the Promotion of Science

制度名：Grants-in-Aid for Scientific Research

研究種目：Grant-in-Aid for Early-Career Scientists

研究機関：Tohoku University

2019年4月1日～ 2021年3月31日

詳細を見る詳細を閉じる

近赤外光受光素子に利用可能な近赤外吸収有機半導体の開発を目的とし、アセンジカルコゲノフェンジオンと呼ばれる、縮環キノイド構造を基盤とするドナー-アクセプター-ドナー型の有機半導体の合成と評価を行った。合成した一連の有機半導体は中性閉殻分子であるにも関わらず、薄膜における吸収帯が1000 nmから1800 nmにも及ぶ近赤外吸収を示した。この薄膜を活性層とした有機電界効果トランジスタは大気中で安定な電荷輸送を示し、電荷移動度が最大で0.2 cm2/Vs程度の良好な半導体特性を示し、本縮環キノイド構造が近赤外吸収有機半導体における有望なビルディングユニットであることを明らかにした。