Google Scholar  &  Researcher ID

2024, March 5th updated

(* denotes corresponding authors,  † denotes equal contribution)

New [72] Crystal-structure control of molecular semiconductors by methylthiolation: towards ultrahigh mobility 

Kazuo Takimiya*,  Kirill Bulgarevich, Kohsuke Kawabata

Accounts of Chemical Research 2024, in press. [Open Access]

New [71] A Novel N-Type Molecular Dopant with A Closed-Shell Electronic Structure Applicable to the Vacuum-Deposition Process

Takaya Matsuo, Kohsuke Kawabata, Kazuo Takimiya*2311047

Advanced  Materials 2024, 2311047. [Open Access]

[70] Quinoidal Acenedichalcogenophenediones for Near-infrared-absorbing Organic Semiconductors: Effects of Chalcogen Atom Substitution on The Physicochemical and Carrier Transport Properties

Kohsuke Kawabata, Kazuo Takimiya*

Chemistry of Materials 2023, 35, 7628-7642.

[69] Methylthiolation of Acenes: Change of Crystal Structure from Herringbone to Rubrene-like Pitched π-Stacking Structure

Kiseki Kanazawa, Kirill Bulgarevich, Kohsuke Kawabata, Kazuo Takimiya*

Crystal Growth & Design 2023, 23, 5941-5949.

[68] Uncovered Effects of thieno[2,3-b]thiophene Substructure in a Tetrathienoacene Backbone: Reorganization Energy and Intermolecular Interaction

Kiseki Kanazawa, Kirill Bulgarevich, Kohsuke Kawabata, Kazuo Takimiya*

Chemistry of Materials 2023, 35, 280-288.

[67] 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 

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

Chinese Journal of Chemistry 2022, 40, 2546-2558.

[66] Effects of Conformation on doping efficiency in π-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 2022, 95, 1047-1053.

[65] Band-like versus temperature-independent carrier transport in isomeric diphenyldinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophenes (DPh-DNTTs) 

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

ACS Materials Letters 2022, 4, 675-681.

 [64] Enantiopure 2-(2-ethylhexyl)dinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophenes: synthesis, single crystal structure and surprising lack of influence of stereoisomerism on thin-film structure and electronic properties

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

Materials Horizons 2022, 9, 444-451.

 [63] 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 

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

Journal of Materials Chemistry C 2022, 10, 2775-2782.

 [62] Quinoid-aromatic Resonance for Very Small Optical Energy Gaps in Small-molecule Organic Semiconductors: a Naphthodithiophenedione-oligothiophene triad system

Kohsuke Kawabata, Kazuo Takimiya*

Chemistry -A European Journal- 2021, 27, 15660-15670. [Cover Feature]

[61] Highly Electron-donating Bipyranylidene Derivatives: Potential n-Type Dopants for Organic Thermoelectrics

Takaya Matsuo, Kohsuke Kawabata, Kazuo Takimiya*

Advanced Energy and Sustainability Research 2021, 2100084. [Open Access]

[60]  “Manipulation” of Crystal Structure by Methylthiolation Enabling Ultrahigh Mobility in a Pyrene-Based Molecular Semiconductor

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

Advanced Materials 2021, 33, 2102914 .  [Open Access] 

[59] Crystal Structures of β-Methylchalcogenated Tetrathienoacenes: From One-Dimensional π-Stacking to Sandwich Pitched π-Stacking Structure

Kazuo Takimiya*, Kiseki Kanazawa, and Kohsuke Kawabata

Crystal Growth and Design 2021, 21, 4055-4063.

[58] 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, and Chinedum O. Osuji*

Advanced Materials Interfaces 2021, 8, 2001977.

[57] Relating Selectivity and Separation Performance of Lamellar Two-Dimensional Molybdenum Disulfide (MoS2) Membranes to Nanosheet Stacking Behavior

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

Environmental Science & Technology 2020, 54, 9640-9651.  

[56] Carbonyl-terminated Quinoidal Oligothiophenes as p-Type Organic Semiconductors

Takato Asoh, Kohsuke Kawabata, Kazuo Takimiya*

Materials 2020, 13, 3020. [Open Access]

[55] “Heavy-atom Effects” in the Parent [1]Benzochalcogenopheno[3, 2-b][1]benzochalcogenophene System

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

Journal of Materials Chemistry C 2020, in press.  

[54] 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, 2020, 15, 915-919.

[53] "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, 2020, 11, 1573-1580. [Open Access] (Press release from RIKEN)

[52] 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, 2020, 85, 195-206.

[51] Precise nanofiltration in a fouling-resistant self-assembled membrane with water-continuous transport pathways

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

Science Advances, 2019, 5, 9308. [Open Access]

[50] Single crystal texture by directed molecular self-assembly along dual axes

Xunda Feng, Kohsuke Kawabata, Matthew G. Cowan, Gregory E. Dwulet, Kristof Toth, Lucas Sixdenier, Amir Haji-Akbari, Richard D. Noble, Menachem Elimelech, Douglas L. Gin, Chinedum O. Osuji* 

Nature Materials, 2019, 18, 1235-1243.

[49] Selenium-substituted β-methylthiobenzo[1,2-b:4,5-b']dithiophenes: synthesis, packing structure, and transport properties

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

Chemistry of Materials, 2019, 31, 6696-6705.

[48] Thienoquinoidal system: promising molecular architecture for optoelectronic applications

Kazuo Takimiya*, Kohsuke Kawabata

Journal of Synthetic Organic Chemistry, Japan 2018, 76, 1176-1184.

[47] Controlling orientational order in block copolymers using low intensity magnetic fields

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, 2017, 114, E9437-E9444.

[46] Polymer nanosheets from supramolecular assemblies of conjugated linoleic acid - high surface area adsorbents from renewable materials

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

Langmuir, 2017, 33, 10690-10697.

[45] Synthesis of electro-optically active polymer composite of poly[2,2'-bis(3,4-ethylenedioxythiophene)-alt-fluorene]/hydroxypropyl cellulose showing liquid crystal structure

Naoto Eguchi, Kohsuke Kawabata, Hiromasa Goto*

Express Polymer Letters 2017, 11, 846–851.

[44] Highly selective vertically aligned nanopores in sustainably derived polymer membranes by molecular templating

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

ACS Nano, 2017, 11, 3911-3921. [Open Access]    (Highlighted in Yale News site)

[43] Induction of helical structure by sesamin, and production of oriented helical polymer with liquid crystal magneto-electrochemical polymerization

Jiuchao Dong, Shigeki Nimori, Kohsuke Kawabata, Hiromasa Goto*

Journal of Polymer Science, Part A: Polymer Chemistry, 2017, 55, 1894-1899.

[42] Electrochemical polymerization of 4,4-dimethyl-2,2’-bithiophene in concentrated polymer liquid crystal solution

Naoto Eguchi, Kohsuke Kawabata, Hiromasa Goto*

Journal of Materials Science and Chemical Engineering, 2017, 5 (2), 64-70.

[41] Chiral-electroactive low-bandgap polymer composite

Naoto Eguchi, Kohsuke Kawabata, Hiromasa Goto*

Journal of Materials Science and Chemical Engineering, 2017, 5 (2), 1-10.

[40] Dithienyl acenedithiophenediones as new π-extended quinoidal cores: synthesis and properties

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

Chemistry - A European Journal 2017,  23, 4579-4589.  [Inside Cover]

[39] Effects of branching position of alkyl side chains on ordering structure and charge transport property in thienothiophenedioneand quinacridone-based semiconducting polymers

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

Polymer Journal 2017, 49, 169-176.

[38] Very small bandgap π-conjugated polymers with extended thienoquinoids

Kohsuke Kawabata*, Masahiko Saito, Itaru Osaka*, Kazuo Takimiya

Journal of the American Chemical Society 2016, 138, 7725-7732.

[37] A poly(ter(3,4-ethylenedioxythiophene)) showing concentric-circle morphology prepared by electrochemical synthesis in a smectic liquid crystal under vertical strong magnetic field

Hiroki Hayashi, Kohsuke Kawabata, Shigeki Nimori, Hiromasa Goto*

Chemistry Letters 2016, 45, 170-172.

[36] Synthesis and optical properties of poly(phenylenethiophene)s bearing conjugated side chains

Hirotsugu Kawashima, Kohsuke Kawabata, Aohan Wang, Hiromasa Goto*

Designed Monomers and Polymers 2015, 18, 661-668.

[35] Thienothiophene-2,5-dione-based donor-acceptor polymers; Improved synthesis and influence of the donor units on ambipolar charge transport properties

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

Advanced Electronic Materials 2015, 1, 1500039.

[34] Synthesis, properties, and doping behavior of optically active polythiophenes bearing a bornyl group

Matsumura, Atsushi, Kohsuke Kawabata, Hiromasa Goto*

Macromolecular Chemistry and Physics 2015, 216, 931-938.

[33] Thiophene-based chiral small bandgap π-conjugated polymers: synthesis and optical properties

Aohan Wang, Kohsuke Kawabata, Hiromasa Goto*

Designed Monomers and Polymers 2015, 18, 360-366.

[32] Synthesis and characterization of a novel donor-acceptor- donor chiral inducer and its application in electrochemical polymerization

Jiuchao Dong, Kohsuke Kawabata, Hiromasa Goto*

Journal of Materials Chemistry C 2015, 3, 2024-2032.

[31] Intramolecular charge transfer (ICT) of a chiroptically active conjugated polymer showing green colour

Hirotsugu Kawashima, Kohsuke Kawabata, Hiromasa Goto*

Journal of Materials Chemistry C 2015, 3, 1126-1133.

[30] Water soluble polyaniline/polysaccharide composite: Polymerization, carbonization to yield carbon micro-bubbles

Kuniharu Nakajima, Kohsuke Kawabata, Hiromasa Goto*

Synthetic Metals 2014, 194, 47-51.

[29] Synthesis of chiral inducers having double stereogenic centers for electrochemical polymerization in cholesteric liquid crystal medium

Tomokazu Iseki, Kohsuke Kawabata, Shigeki Nimori, Hiromasa Goto*

Synthetic Metals 2014, 187, 217-223.

[28] Catalysis direction selective asymmetric polymerization in chiral liquid crystal medium

Tomokazu Iseki, Kohsuke Kawabata, Hirotsugu Kawashima, Hiromasa Goto*

Polymer 2014, 55, 66-72.

[27] Synthesis and characterization of thieno[3,​2-​b]​thiophene-​based linear shaped liquid crystals

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

Liquid Crystals 2013, 40, 1455-1465.

[26] Synthesis and properties of low-bandgap liquid crystalline π-conjugated polymers

Hiromasa Goto*, Aohan Wang, Kohsuke Kawabata, Fan Yang

Journal of Materials Science 2013, 48, 7523-7532.

[25] 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 pi-conjugated polymer

Hiromasa Goto*, Aohan Wang, Shigeki Nimori, Kohsuke Kawabata

Liquid Crystals 2013, 40, 1159-1166.

[24] Synthesis of isothianaphthene (ITN)–and 3,4-ethylenedioxy-thiophene (EDOT) - based low-bandgap liquid crystalline conjugated polymers

Aohan Wang, Kohsuke Kawabata, and Hiromasa Goto*

Materials 2013, 6, 2218-2228. [Open Access]

[23] Horizontal and vertical orientation of polythiophenes by electrochemical polymerization in magnetically aligned smectic liquid crystal

Kohsuke Kawabata, Shigeki Nimori, Hiromasa Goto*

ACS Macro Letter 2013, 2, 587-591.

[22] Synthesis of a pyrimidine-based new chiral inducer for construction of cholesteric liquid crystal electrolyte solution and its electrochemical polymerization, and stimulation emission like interference

Aohan Wang, Kohsuke Kawabata, Hirotsugu Kawashima, Hiromasa Goto*

Polymer 2013, 54, 3821-3827.

[21] A possibility for generation of two species of charge carriers along main-chain and side-chains for a π-conjugated polymer

Yuki Kudo, Kohsuke Kawabata, Hiromasa Goto*

Journal of Physics: Conference Series 2013, 428, 012006.

[20] Optical activity of heteroaromatic conjugated polymer films prepared by asymmetric electrochemical polymerization in cholesteric liquid crystals: structurally induction function

Kohsuke Kawabata, Masaki Takeguchi, Hiromasa Goto*

Macromolecules 2013, 46, 2078-2091.

[19] Helical twisting power of three-ring chiral molecules and polymerization in cholesteric electrolyte solutions

Hitoshi Hayashi, Aohan Wang, Kohsuke Kawabata, Hiromasa Goto*

Materials Chemistry and Physics 2013, 137, 816-824.

[18] Synthesis of polymers from chiral monomers in chiral liquid crystals

Satoshi Ohkawa, Fan Yang, Kohsuke Kawabata, Hiromasa Goto*

Journal of Applied Polymer Science 2013, 128, 3586-3591.

[17] Small carbon forms from polyaniline/metal

Hiromasa Goto*, Atsushi Yokoo, Masaki Takeguchi, Kohsuke Kawabata

International Journal of Polymeric Materials and Polymeric Biomaterials 2013, 62, 426-432.

[16] Preparation of phenylenevinylene derivatives having fluorescence and chiral induction function

Hiromasa Goto*, Kohsuke Kawabata

Journal of Dispersion Science and Technology 2013, 34, 311-321.

[15] Synthesis and optical properties of 1,1-binaphthol-thiophene alternating copolymers with main chain chirality

Kohsuke Kawabata, Hiromasa Goto*

Journal of Materials Chemistry 2012, 22, 23514-23524.

[14] Dynamic emission controllable polymer nanofibers ― Electro-fluorescence chromism and polarized emission of polycarbazole derivatives

Kohsuke Kawabata, Hiromasa Goto*

Chemistry - A European Journal 2012, 18, 15065-15072.

[13] Synthesis and double doping behavior of a poly(p-phenylenevinylene)s bearing conjugated side chains

Hirotsugu Kawashima, Kohsuke Kawabata, Hiromasa Goto*

Journal of Polymer Science Part A: Polymer Chemistry 2012, 50, 1530–1538.

[12] Synthesis of a low-bandgap polymer bearing side groups containing phenoxy radicals

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

Journal of Materials Science 2011, 46, 6556-6562.

[11] Light driven asymmetric polymerization: an approach for tele-control reaction

Hiromasa Goto*, Kohsuke Kawabata

Polymer Chemistry 2011, 2, 1098-1106.

[10] Polymerization in liquid crystal medium: Preparation of polythiophene derivatives bearing a bulky pyrimidine substituent

Satoshi Ohkawa, Reina Ohta, Kohsuke Kawabata, Hiromasa Goto*

Polymers 2010, 2, 393-406. [Open Access]

[9] Uniaxially ordered conjugated polymer film prepared by electrochemical polymerization in a nematic liquid crystal with rubbing orientation method showing redox-driven tunable dichroism

Kohsuke Kawabata, Hiroyuki Yoneyama, Hiromasa Goto*

Polymer Chemistry 2010, 1, 1606-1608.

[8] Electrosynthesis of 2,7-linked polycarbazole derivatives to realize low-bandgap electroactive polymers

Kohsuke Kawabata, Hiromasa Goto*

Synthetic Metals 2010, 160, 2290-2298.

[7] Electrochemical preparation of an electroactive polymer poly(dodecyloxy dibenzothiophene) (polyDDBTh) from hydroxyl dibenzothiophene (HDBTh) as a bioconverted monomer

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

Journal of Applied Electrochemistry 2010, 40, 191-195.

[6] Periodic structure in a fluorene-based polymer prepared by electrochemical polymerization

Kohsuke Kawabata, Hiromasa Goto*

Chemistry Letters 2009, 38, 706-707.

[5] Preparation of furan-based monomers and asymmetric electrochemical polymerization in cholesteric liquid crystals: optically activity and selective reflection

Kohsuke Kawabata, Hiroyuki Yoneyama, Hiromasa Goto*

Molecular Crystals and Liquid Crystals 2009, 515, 3-15.

[4] Liquid crystalline π-conjugated copolymers bearing a pyrimidine type mesogenic group

Kohsuke Kawabata, Hiromasa Goto*

Materials 2009, 2, 22-37. [Open Access]

[3] Preparation of iridescent-reflective poly(furan-co-phenylene)s by electrochemical polymerization in a cholesteric liquid crystal medium

Hiroyuki Yoneyama, Kohsuke Kawabata, Akitsu Tsujimoto, Hiromasa Goto*

Electrochemistry Communications 2008, 10, 965-969.

[2] Visualization of nematic liquid crystal director by alignment of π-conjugated polymer nanotubes

Hiromasa Goto*, Kohsuke Kawabata

Macromolecules 2008, 41, 4551-4554.

[1] Cholesteric liquid crystal inductive asymmetric polymerization of thiophene monomers

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

Liquid Crystal 2008, 35, 847-856.