63. New Molecules 

Yuto Hino, Shotaro Hayashi*

Mesityl-Appended 1,4-Bis(β-acrylonitrile)-2,5-dimethoxybenzene: Blue and Green Fluorescent Crystals from a Soluble Donor–Acceptor Molecular System

ChemistrySelect, Vol. XX, pp. XXX-XXX, 2022.

62. Organic Synthesis  

Mahiro Nakabayashi, Nagatoshi Nishiwaki, Akitaka Ito, Shotaro Hayashi,* Kento Iwai* 

Efficient Synthesis of α-Nitro-β-Dialdimine Ligands via Equilibrium– Controlling Approach

Tetrahedron Letters, Vol. XX, pp. XXX-XXX, 2022.

61. Crystal Engineering   

Shotaro Hayashi*

Elastic Molecular Crystals: Their Deformation-induced Reversible Unit Cell Changes with Specific Poisson Effect

Bulletin of the Chemical Society of Japan, Vol. 95, pp. 721-727, 2022.

10.1246/bcsj.20220040

 

     Selected Paper of Bulletin of the Chemical Society of Japan

60. Fluorescent Polymers

Haruka Yamauchi  ‡, Mahiro Nakabayashi , Maiko Kawada, Yuto Hino, Syunya Inayama, Hiroki Tanikubo, Shotaro Hayashi*

Synthesis of Acrylonitrile Side Chain-appended π-Conjugated Polymers by a Suzuki Cross-coupling Polycondensation and a Knoevenagel Condensation, and Their Optical Properties

Materials Advances, Vol. 3, pp. 3835-3841, 2022.

ma/d2ma00113f

 ‡ Authors with equal contribution.

     Selected as Outside Front Cover of Materials Advances

59. Networks  

Haruka Yamauchi, Atsushi Asano, Shotaro Hayashi* 

Synthesis of Covalent Boroxine Frameworks by Polycondensation of Tetrahydroxydiboron

HETEROCYCLES, Vol. 104, pp. 979-986, 2022.

27565/104/5

58. Flexible Molecular Crystals  

Shuai Zhao, Hiroshi Yamagishi, Osamu Oki, Yuta Ihara, Naoki Ichiji, Atsushi Kubo, Shotaro Hayashi,* Yohei Yamamoto*

Mechanically Flexible and Optically Tunable Organic Crystal Resonator

Advanced Optical Materials, Vol. 10, pp. 2101808, 2022.

10.1002/adom.20210180

57. Crystal Engineering   

Yuto Hino, Shotaro Hayashi*

Thermo-triggered Domino-like Single-Crystal-to-Single-Crystal Phase Transition from Face-to-edge to Face-to-face Packing of Anthracene

Chemistry-A European Journal, Vol. 27, pp. 17595-17600, 2021.

10.1002/chem.202103165

     Selected as Inside Front Cover of Chemistry-A European Journal

     プレスリリース「分子結晶でドミノの様な単結晶ー単結晶相転移の実現」2021年11月5日

     Selected as Hot Paper of Chemistry - A European Journal

56. Sensing   

Airong Qiagedeer, Hiroshi Yamagishi,* Shotaro Hayashi, Yohei Yamamoto*

Polymer Optical Microcavity Sensor for Volatile Organic Compounds with Distinct Selectivity toward Aromatic Hydrocarbons

ACS Omega, Vol. 6, pp. 21066-21070, 2021.

10.1021/acsomega.1c02749

55. New Molecules   

Shotaro Hayashi*

Cyano-substituted Oligo(p-phenylene-vinylene)s having Linear and Branched Octyloxy Groups: Control of Aggregation and Emitting Properties via C8 Alkyl Chain Difference

Molecular Systems Design & Engineering, Vol. 6, pp. 503-507, 2021.

me/d1me00020a

54. Crystal Engineering   

Shotaro Hayashi*

Curving Deformation-induced Photoluminescence Changes and Anisotropy Analysis in Elastic Organic Crystals

CrystEngComm, Vol. 23, pp. 5763-5767, 2021.

ce/d1ce00400j

53. Crystalline Polymers

Shotaro Hayashi*

Highly Crystalline and Efficient Red-emissive π-Conjugated Polymer Film: Tuning of Macrostructure for Light-emitting Properties

Materials Advances, Vol. 1, pp. 632-638, 2020.

ma/d0ma00218f

     Selected as Back Cover of Materials Advances

     Highlighted in News and Topics @KUT

52. Elastic Organic Crystals

Shotaro Hayashi*, Fumitaka Ishiwari, Takanori Fukushima, Motomichi Tashiro, Yutaka Imamura, Michio Katouda 

Anisotropic Poisson’s Effect and Deformation-induced Fluorescence Change of Elastic 9,10-Dibromoanthrathene Single Crystals

Angewandte Chemie International Edition, Vol. 59, pp. 16195-16201, 2020.

10.1002/anie.202006474

51. Polycondensation

Kaoru Uegaki, Kazuhiro Nakabayashi, Shin-ichi Yamamoto, Toshio Koizumi, Shotaro Hayashi*

Donor–acceptor Random Regioregular π-Conjugated Copolymers based on Poly(3-hexylthiophene) with Unsymmetrical Monothienoisoindigo Units

RSC Advances, Vol. 10, pp. 19034-19040, 2020.

d0ra03557b

50. New Molecules

Toshiki Fujii, Susumu Tanaka, Shotaro Hayashi*, Hiroaki Imoto*, Kensuke Naka*

Dipyridinoarsole: A New Class of Stable and Modifiable Heteroatom-bridged Bipyridines

​Chemical Communications, Vol. 56, pp. 6035-6038, 2020.

10.1039/D0CC02389B

     Selected as Inside Front Cover of Chemical Communications

     Highlighted in News and Topics @KUT

49. Crystal Engineering   

Shotaro Hayashi*, Toshio Koizumi

Direction-specific Fluorescence of an Engineered Organic Crystal and Its Mechanically Induced Shaping-caused New Face Appearance

CrystEngComm, Vol. 21, pp. 5990-5994, 2019.

c9ce01002e

     Selected as Back Cover of CrystEngComm

48. Network Polymer Sensors

Shotaro Hayashi*, Shin-ichi Yamamoto, Koji Nishi, Atsushi Asano, Toshio Koizumi

Synthesis of Network Polymer Emitters: Tunable Detection of Chemicals by the Geometric Design

​Polymer Journal, Vol. 51, pp. 1055-1061, 2019.

s41428-019-0216-1

47. Polymer Synthesis

Toshio Koizumi*, Tsuyoshi Kameda, Hironori Saito, Ayumu Sato, Shotaro Hayashi

Facile Synthesis of ortho-Phenylene-based Conjugated Polymers through Transformation of Cross-conjugated Poly(2,3-diaryl[2]dendralene)s and their Optical Properties

Journal of Polymer Science, Part A: Polymer Chemistry, Vol.57, pp.827-832, 2019.

10.1002/pola.29333

46. Organic Synthesis

Shotaro Hayashi*, Minami Sakamoto, Fumitaka Ishiwari, Takanori Fukushima, Shin-ichi Yamamoto, Toshio Koizumi

A Versatile Scaffold for Facile Synthesis of Fluorescent Cyano-substituted Stilbenes

Tetrahedron, Vol.75, pp.1079-1084, 2019.

10.1016/j.tet.2019.01.012

45. Fluorescent Materials

Shotaro Hayashi*, Toshio Koizumi, Natsumi Kamiya

2,5-Dimethoxybenzene-1,4-dicarboxaldehyde: An Emissive Organic Crystal and Highly Efficient Fluorescent Waveguide

ChemPlusChem, Vol. 84, pp.247-251, 2019.

10.1002/cplu.201800597

 

     Selected as Cover Feature of ChemPlusChem

44. Flexible Organic Crystals

Shotaro Hayashi*, Shun-ya Yamamoto, Daisuke Takeuchi, Yutaka Ie, Koji Takagi*

Creating Elastic Organic Crystals of π‐Conjugated Molecules with Bending Mechanofluorochromism and Flexible Optical Waveguide

Angewandte Chemie International Edition, Vol. 57, pp.17002-17008, 2018.

10.1002/anie.201810422

     Selected as Infront Cover of Angewandte Chemie International Edition

        Highlighted in π造形科学ニュース Vol. 52 (現代化学)

43. Polycondensation

Shotaro Hayashi*, Shin-ichi Yamamoto, Toshio Koizumi

Study on Direct Arylation of Bithiophene with Dibromoxanthene: Detection of Polymer, Oligomeric and Cyclic Byproducts and Easy Separation of the Polymer

Materials Today Communications, Vol.17, pp.259-265, 2018.

10.1016/j.mtcomm.2018.09.008

 

42. Electropolymerization

Hiroaki Imoto, Chieko Yamazawa, Shotaro Hayashi*, Masami Aono, Kensuke Naka*

Electropolymerization of Dithieno[3,​2-​b:2',​3'-​d]​arsole

ChemElectroChem, Vol.5, pp.3357-3360, 2018.

10.1002/celc.201801069

     Selected as Cover Feature of ChemElectroChem

41. Supramolecules

Shotaro Hayashi*, Atsushi Takigami, Toshio Koizumi

Solvent Control over Supramolecular Gel Formation and Fluorescence for a Highly Crystalline π-Conjugated Polymer

Chemistry - An Asian Journal, Vol.13, pp.2014-2018, 2018.

10.1002/asia.201800941

     Selected as Cover Feature of Chemistry - An Asian Journal

40. Organic Synthesis

Shotaro Hayashi*, Ryosuke Hirai, Shin-ichi Yamamoto, Toshio Koizumi

A Simple Route to Unsymmetric Cyano-substituted Oligo(p-phenylene-vinylene)s

Chemistry Letters, Vol.47, pp.1003-1005, 2018.

10.1246/cl.180345

39. Flexible Organic Crystals

Shotaro Hayashi*, Toshio Koizumi

Mechanically Induced Shaping of Organic Single Crystals: Facile Fabrication of Fluorescent and Elastic Crystal Fibers

Chemistry - A European Journal, Vol.24, pp.8507-8512, 2018.

10.1002/chem.201801965

     Selected as Infront Species of Chemistry - A European Journal

38. Flexible Organic Crystals

Shotaro Hayashi*, Toshio Koizumi, Katsumi Kamiya

Elastic Bending Flexibility of Fluorescent Organic Single Crystal: New Aspects of Commonly Used Building Block “4,7-Dibromo-2,1,3-benzothiadiazole”

Crystal Growth & Design, Vol.17, pp.6158-6162, 2017.

10.1021/acs.cgd.7b00992

     新聞報道:日刊工業新聞 平成29年12月28日 

         「曲がる結晶材、防衛大が開発 力かけると変色」

     Web News:Yahoo! Japan News 平成29年12月31日 

           「防衛大、曲がる結晶材を開発 力かけると「転移」で屈曲」

     Web News:Goo News 平成29年12月31日 

           「力かけると変色、曲がる結晶材とは?」

 

37. Network Polymer Sensors

Shotaro Hayashi*, Yuki Togawa, Shin-ichi Yamamoto, Toshio Koizumi*, Koji Nishi, Atsushi Asano

Synthesis of π-Conjugated Network Polymers Based on Fluoroarene and Fluorescent Units via Direct Arylation Polycondensation and Their Porosity and Fluorescent Properties

Journal of Polymer Science, Part A: Polymer Chemistry, Vol.55, pp.3862-3867, 2017.

10.1002/pola.28770

36. Flexible Organic Crystals

Shotaro Hayashi*, Atsushi Asano, Natsumi Kamiya, Yoshinobu Yokomori, Takuto Maeda, Toshio Koizumi

Fluorescent Organic Single Crystals with Elastic Bending Flexibility: 1,4-Bis(thien-2-yl)-2,3,5,6-tetrafluorobenzene Derivatives

Scientific Reports, Vol.7, p.9453, 2017.

10.1038/s41598-017-09848-0.

35. Organic Synthesis

Shotaro Hayashi, Masayuki Kasuya, Junichi Machida, Toshio Koizumi*

From Propargylic Biscarbonate to Diaryl[n]dendralenes

Tetrahedron Letters, Vol. 58, pp. 2429-2432, 2017.

10.1016/j.tetlet.2017.05.016

34. Polymer Electronics

Shotaro Hayashi*, Shin-ichi Yamamoto, Toshio Koizumi

Effects of Molecular Weight on the Optical and Electrochemical Properties of EDOT-based π-Conjugated Polymers

Scientific Reports, Vol. 7, p. 1027, 2017.

10.1038/s41598-017-01132-5

33. Polycondensation

Yoshihisa Kojima, Shotaro Hayashi*, Toshio Koizumi*

Palladium on Carbon (Pd/C)-Catalyzed Direct C-H Arylation Polycondensation of 3,4-Ethylenedioxythiophene with Various Dibromoarenes

Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 55, pp. 1183-1188, 2017.

10.1002/pola.28475

32. Polycondensation

Shotaro Hayashi*, Yoshihisa Kojima, Toshio Koizumi*

Direct Arylation Polycondensation of β-Unprotected Chalcogen Heteroles under Phosphine-free Conditions

Polymer, Vol. 113, pp. 214-220, 2017.

10.1016/j.polymer.2017.02.067

 

31. Organic Synthesis

Shotaro Hayashi*, Shin-ichi Yamamoto, Toshio Koizumi

A Cyclic Compound based on Xanthene-linked π-Dimer via Direct Arylation

Chemistry Letters, Vol. 46, pp. 200-203, 2017.

10.1246/cl.160930

30. Polycondensation

Shotaro Hayashi*, Yuki Togawa, Yoshihisa Kojima, Toshio Koizumi*

Direct Arylation of Fluoroarenes toward Linear, Bent-shaped and Branched π-Conjugated Polymers: Polycondensation and Post-polymerization Approaches

Polymer Chemistry, Vol. 7, pp. 5671-5686, 2016.

10.1039/C6PY01237J

     Selected as 物質・デバイス共同研究拠点顕著業績 平成28年8月

29. Polycondensation

Shotaro Hayashi*, Atsushi Takigami, Toshio Koizumi

Palladium-immobilized on Thiol-modified Silica Gel for an Effective Direct C-H Arylation

ChemPlusChem, Vol. 81, pp. 930-934, 2016.

10.1002/cplu.201600188

28. Polycondensation

Shotaro Hayashi*, Toshio Koizumi

Synthesis of Small Band Gap Poly[Bis-EDOT-Isoindigo] via Direct Arylation and Oxidative Electropolymerization, and Its Optoelectronic Properties

Electrochemistry, Vol. 84, pp. 570-573, 2016.

10.5796/electrochemistry.84.570

27. Flexible Organic Crystals

Shotaro Hayashi*, Toshio Koizumi

Elastic Organic Crystal of a Fluorescent π-Conjugated Molecule

Angewandte Chemie International Edition, Vol. 55, pp. 2701-2704, 2016.

10.1002/anie.201509319

     Highlighted in atras of Science, 12 April 2016

     新聞報道:日刊工業新聞 平成28年5月23日

         「防衛大、柔らかさ高分子樹脂並みの半導体材料向け有機単結晶を開発」

     テレビ出演:未来の起源(TBS)平成28年12月18日

     Highlighted in 高分子“Hot Topics”平成29年4月号

     Highlighted in π造形科学ニュース Vol. 39 (現代化学)

26. Polycondensation

Shotaro Hayashi*, Yuki Togawa, Jun Ashida, Koji Nishi, Atsushi Asano, Toshio Koizumi*

Synthesis of π-Conjugated Porous Polymers via Direct Arylation of Fluoroarenes with Three-arm Triazine

Polymer, Vol. 90, pp. 187-192, 2016.

10.1016/j.polymer.2015.11.056

 

25. Polycondensation

Shotaro Hayashi*, Toshio Koizumi

Chloride-promoted Pd-Catalyzed Direct C-H Arylation for Highly Efficient Phosphine-free Synthesis of π-Conjugated Polymers

Polymer Chemistry, Vol. 6, pp 5036-5039, 2015.

10.1039/c5py00871a

24. Polycondensation

Shotaro Hayashi*, Yoshihisa Kojima, Toshio Koizumi*

Highly Regioselective Pd/C-Catalyzed Direct Arylation toward Thiophene-based π-Conjugated Polymers

Polymer Chemistry, Vol. 6. pp 881-885, 2015.

10.1039/C4PY01426J

     Selected as Back Cover of Polymer Chemistry Issue 6

     Highlighted in Polymer Chemistry Blog “Paper of the week”

 

23. Polymer Materials

Shotaro Hayashi*, Toshio Koizumi

Solubility Switching of Fluorescent Polymer Films via Lewis Acid-Base Vapor Treatments

Journal of Polymer Science Part A; Polymer Chemistry, Vol. 52. pp 3142-3145, 2014.

10.1002/pola.27366

22. Polymer Synthesis

Shinsuke Inagi*, Noriyuki Kaihatsu, Shotaro Hayashi, Toshio Fuchigami

Facile Synthesis of a Variety of Triarylamine-based Conjugated Polymers and Tuning of Their Optoelectronic Properties

Synthetic Metals, Vol. 187, pp. 81-85, 2014.

10.1016/j.synthmet.2013.10.024

21. Polymer Materials

Shotaro Hayashi*, Atsushi Asano, Toshio Koizumi

Trifluoroborate-Modification of Both Pyridine and N-Alkyldiarylamine-Based π-Conjugated Polymer Films: Tuning the Electronic Communication and the Mean Conjugated Length Based on Two Types of Nitrogen in the Conjugated Main Segments

RSC Advances, Vol. 3, pp. 7375-7380, 2013.

10.1039/c3ra40945g

 

20. Electropolymerization

Shotaro Hayashi*, Toshio Koizumi

From Thiopheneboroles to Boron-containing Conjugated Macromolecules via Electropolymerization

Electrochemistry, Vol. 81, No.5, pp. 340-342, 2013.

10.5796/electrochemistry.81.340

 

19. Electropolymerization

Shotaro Hayashi*, Toshio Koizumi

Two Synthetic Approaches from Di(thien-2-yl)-2,5-pyridine to a BF3-Modified Polymer Film

Chemistry Letters, Vol. 41, No.9, pp. 979-981, 2012.

10.1246/cl.2012.979

18. Polycondensation

Shotaro Hayashi*, Noriyuki Nishioka, Hironari Nishiyama, Toshio Koizumi

π-Conjugated Alternating Copolymer Based on the 3,5-Dinitro-9-fluorenone for Electron-Acceptor Type Materials

Synthetic Metals, Vol. 162, pp. 1485-1489, 2012.

10.1016/j.synthmet.2012.06.029

17. Polycondensation

Noriyuki Nishioka, Shotaro Hayashi, Toshio Koizumi*

Pd(0)-Catalyzed Synthesis of Cross-Conjugated Polymers and Their Transformation to Linear-Conjugated Polymers by Diels-Alder Reaction

Angewandte Chemie International Edition, Vol. 51. pp 3682-3685, 2012.

10.1002/anie.201200303

     Highlighted in Organometallic Chemistry News, 10 June 2012

16. Electropolymerization

Shotaro Hayashi*, Toshio Koizumi

From Benzodiazaborole-based Compound to Donor-Acceptor Polymer via Electropolymerization

Polymer Chemistry, Vol. 3, pp. 613-616, 2012.

10.1039/C2PY00563H

15. Polymer Materials

Shotaro Hayashi*, Atsushi Asano, Toshio Koizumi

Modification of Pyridine-based Conjugated Polymer Films via Lewis Acid: Halochromism, Characterization and Macroscopic Gradation Patterning

Polymer Chemistry, Vol. 2, pp. 2764-2766, 2011.

10.1039/C1PY00363A

     Selected as Front Cover of Polymer Chemistry Issue 12

14. Electroorganic Synthesis

Axel Kirste, Shotaro Hayashi, Gregor Schnakenburg, Itamar M. Malkowsky, Florian Stecker, Andreas Fischer, Toshio Fuchigami, Siegfrid R. Waldvogel*

Highly Selective Electrosynthesis of Biphenoles on Graphite Electrodes in Fluorinated Media

Chemistry: A European Journal, Vol. 17, pp. 14164-14169, 2011.

10.1002/chem.201102182

 

13. Electrochemical Polymer Reaction

Shotaro Hayashi, Shinsuke Inagi*, Toshio Fuchigami*

Efficient Electrochemical Polymer Halogenation using Thin Layered Cell

Polymer Chemistry, Vol. 2, pp. 1632-1637, 2011.

10.1039/C1PY00150G

12. Electrochemical Polymer Reaction

Shinsuke Inagi*, Kazuya Koseki, Shotaro Hayashi, Toshio Fuchigami*

Electrochemical Tuning of the Optoelectronic Properties of a Fluorene-Based Conjugated Polymer

Langmuir, Vol. 26 (24), pp. 18631-18633, 2010.

10.1021/la104099q

 

11. Supramolecules

Shotaro Hayashi, Shinsuke Inagi*, Toshio Fuchigami*

Macrostructural Order and Optical Properties of Polyfluorene-Based Polymer Film

Polymer Journal, Vol. 42, pp. 772-775, 2010.

pj201058

10. Electropolymerization

Shinsuke Inagi, Takahiro Yamaguchi, Shotaro Hayashi, Kazuya Koseki, Toshio Fuchigami*

Electropolymerization of 9,9-Difluorofluorene in BF3-OEt2 toward a Photostable n-Type Material

Electrochemistry Communications, Vol. 12 (5), pp. 661-663, 2010.

10.1016/j.elecom.2010.02.025

9. Electrochemical Polymer Reaction

Shinsuke Inagi, Kenta Hosaka, Shotaro Hayashi, Toshio Fuchigami*

Solid-Phase Halogenation of a Conducting Polymer Film via Electrochemical Polymer Reaction

Journal of the Electrochemical Society, Vol. 157 (5), pp. E88-E91, 2010.

10.1149/1.3364926

8. Electrochemical Polymer Reaction

Shotaro Hayashi, Shinsuke Inagi, Toshio Fuchigami*

Electrochemical Modification of a Fluorene-Carbazole Alternating Copolymer toward a Novel Donor-Acceptor Type Conjugated Polymer

Electrochemistry, Vol. 78 (2), pp. 114-117, 2010.

10.5796/electrochemistry.78.114

7. Electrochemical Polymer Reaction

Shotaro Hayashi, Shinsuke Inagi, Kenta Hosaka, Toshio Fuchigami*

Post-Functionalization of Poly(3-hexylthiophene) via Anodic Chlorination

Synthetic Metals, Vol. 159, pp. 1792-1795, 2009.

10.1016/j.synthmet.2009.05.028

6. Electrochemical Polymer Reaction

Shinsuke Inagi, Shotaro Hayashi, Kenta Hosaka, Toshio Fuchigami*

Facile Functionalization of a Thiophene-Fluorene Alternating Copolymer via Electrochemical Polymer Reaction

Macromolecules, Vol. 42 (12), pp. 3881-3883, 2009.

10.1021/ma900561f

5. Electrochemical Polymer Reaction

Shotaro Hayashi, Shinsuke Inagi, Toshio Fuchigami*

Synthesis of 9-Substituted Fluorene Copolymers via Chemical and Electrochemical Polymer Reaction and Their Optoelectronic Properties

Macromolecules, Vol. 42 (12), pp. 3755-3760, 2009.

10.1021/ma900358x

 

     Highlighted in Synfacts 2009, 11, 1214.

 

4. Electrochemical Polymer Reaction

Shinsuke Inagi, Shotaro Hayashi, Toshio Fuchigami*

Electrochemical Polymer Reaction: Selective Fluorination of Poly(fluorene) Derivative

Chemical Communications, No. 13, pp. 1718-1720, 2009.

10.1039/b822510a 

3. Polymer Synthesis

Kaoru Adachi, Satoshi Honda, Shotaro Hayashi, Yasuyuki Tezuka*

ATRP-RCM Synthesis of Cyclic Diblock Copolymers

Macromolecules, Vol. 41 (21), pp. 7898-7903, 2008.

10.1021/ma801363n

2. Polymer Synthesis

Shotaro Hayashi, Kaoru Adachi, Yasuyuki Tezuka*

ATRP-RCM Synthesis of 8-Shaped Poly(methyl acrylate) via 4-Armed Star Telechelics

Polymer Journal, Vol. 40 (6), pp. 572-576, 2008.

pj200892

1. Polymer Synthesis

Shotaro Hayashi, Kaoru Adachi, Yasuyuki Tezuka*

An Efficient Route to Cyclic Polymers by ATRP–RCM Process

Chemistry Letters, Vol. 36 (8), pp. 982-983, 2007.

10.1246/cl.2007.982