YOHHEI ADACHI

Last Updated :2025/04/03

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Assistant Professor
Web Site
https://orgmtrls.hiroshima-u.ac.jp/Ohshita_Group/Ohshita_Group-Home.html
E-mail
yadachihiroshima-u.ac.jp
Self-introduction
I am working on the synthesis and characterization of new pi-conjugated molecules incorporating typical elements such as boron.

Basic Information

Major Professional Backgrounds

  • 2017/04/01, 2020/03/31, Hiroshima University, Graduate School of Engineering, Assistant Professor
  • 2019/03/01, 2020/01/31, Rutgers University (USA), Postdoctoral Researcher (Host: Prof. Frieder Jakle)
  • 2022/09, 2023/03, KONICA MINOLTA, Technology development department, Researcher (Cross Appointment)
  • 2020/04/01, Hiroshima University, Graduate School of Advanced Science and Engineering, Assistant Professor

Educational Backgrounds

  • Hiroshima University, Graduate School of Engineering, Department of Applied Chemistry, Japan, 2015/09, 2017/03
  • Hiroshima University, Graduate School of Engineering, Department of Applied Chemistry, Japan, 2014/04, 2015/09
  • Hiroshima University, School of Engineering, Cluster 3, Japan, 2010/04, 2014/03

Academic Degrees

  • Hiroshima University
  • Hiroshima University

Educational Activity

  • [Bachelor Degree Program] School of Engineering : Cluster 3(Applied Chemistry, Biotechnology and Chemical Engineering) : Program of Applied Chemistry
  • [Master's Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Applied Chemistry Program
  • [Master's Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Smart Innovation Program
  • [Doctoral Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Applied Chemistry Program
  • [Doctoral Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Smart Innovation Program

Research Fields

  • Chemistry;Materials chemistry;Organic and hybrid materials

Research Keywords

  • Phosphorescent Materials Siloxanes Antifogging Materials CO2 Separation Membrane Water Separation Membrane Bismuth High refractive index polymer
  • Boron Conjugated polymer Fluoride Ion Sensing Solid-state fluorescence Organic dye Organic field-effect transistor Dye-sensitized solar cell Organic thin film solar cell Mechanofluorochromism

Affiliated Academic Societies

Educational Activity

Course in Charge

  1. 2025, Liberal Arts Education Program1, 2Term, General Chemistry
  2. 2025, Undergraduate Education, 4Term, Exercises in Organic Chemistry
  3. 2025, Undergraduate Education, First Semester, Chemical Experiments I
  4. 2025, Undergraduate Education, Year, Graduation Thesis
  5. 2025, Graduate Education (Master's Program) , 1Term, Special Exercises on Applied Chemistry A
  6. 2025, Graduate Education (Master's Program) , 2Term, Special Exercises on Applied Chemistry A
  7. 2025, Graduate Education (Master's Program) , 3Term, Special Exercises on Applied Chemistry B
  8. 2025, Graduate Education (Master's Program) , 4Term, Special Exercises on Applied Chemistry B
  9. 2025, Graduate Education (Master's Program) , Academic Year, Special Study on Applied Chemistry
  10. 2025, Graduate Education (Master's Program) , 1Term, Special Exercises on Smart Innovation A
  11. 2025, Graduate Education (Master's Program) , 2Term, Special Exercises on Smart Innovation A
  12. 2025, Graduate Education (Master's Program) , 3Term, Special Exercises on Smart Innovation B
  13. 2025, Graduate Education (Master's Program) , 4Term, Special Exercises on Smart Innovation B
  14. 2025, Graduate Education (Master's Program) , Academic Year, Special Study on Smart Innovation
  15. 2025, Graduate Education (Master's Program) , Academic Year, Special Study on Smart Innovation
  16. 2025, Graduate Education (Doctoral Program) , Academic Year, Special Study on Smart Innovation
  17. 2025, Graduate Education (Doctoral Program) , Academic Year, Special Study on Smart Innovation

Award of Education

  1. 2021/03/19

Research Activities

Academic Papers

  1. Insights into mechanistic interpretation of crystalline-state reddish phosphorescence of non-planar pi-conjugated organoboron compounds, CHEMICAL SCIENCE, 15(21), 8127-8136, 20240529
    Link to Paper Search Results by DOI
  2. Synthesis of Unsymmetrically Condensed Benzo- and Thienotriazologermoles, MOLECULES, 29(11), 2684, 20240605
    Link to Paper Search Results by DOI
  3. Conjugated Building Blocks Based on Electron-Deficient Thiaborin S-Oxides, ORGANOMETALLICS, 43(8), 829-839, 20240321
    Link to Paper Search Results by DOI
  4. Preparation of Polysilsesquioxane-Based CO2 Separation Membranes with Thermally Degradable Succinic Anhydride and Urea Units, SEPARATIONS, 11(4), 110, 20240402
    Link to Paper Search Results by DOI
  5. Synthesis and Properties of Boron-Containing Heteromerous Bistricyclic Aromatic Enes: Structural Effects on Thermodynamic Stability and Photoreactivity, CHEMISTRY-A EUROPEAN JOURNAL, 29(72), e202302370, 20231222
    Link to Paper Search Results by DOI
  6. Phosphorescence Properties of Boron/Bismuth Hybrid Conjugated Materials, CHEMISTRY-AN ASIAN JOURNAL, 19(7), e202301142, 20240319
    Link to Paper Search Results by DOI
  7. Group 15 Element (As, Sb, Bi)-Substituted Bibenzofurans with Noncovalent Conformational Locks for Enhanced Planarity, ORGANOMETALLICS, 42(23), 3397-3404, 20231121
    Link to Paper Search Results by DOI
  8. Dicyanovinyl-capped thiazologermoles with moderate donor-acceptor interaction as visible photoluminescence turn-on sensors for primary amines, DYES AND PIGMENTS, 219, 111550, 20230718
    Link to Paper Search Results by DOI
  9. Highly luminescent antiaromatic diborinines with fused thiophene rings, DALTON TRANSACTIONS, 52(27), 9389-9397, 20230711
    Link to Paper Search Results by DOI
  10. ★, Conjugated polymers with thiophene-fused thiaborin units and their strong intermolecular interactions, POLYMER JOURNAL, 55, 489-496, 20221116
  11. Synthesis and Optical Properties of Anthryl-substituted Tetracyclic Borepins, CHEMISTRY LETTERS, 51(6), 654-657, 20220421
  12. Preparation of D-A copolymers based on dithiazologermole and germaindacenodithiazole as weak electron donor units, POLYMER JOURNAL, 55, 797-805, 20230324
  13. Preparation of thermally stable 3-glycidyloxypropyl-POSS-derived polysilsesquioxane RO membranes for water desalination, JOURNAL OF MEMBRANE SCIENCE, 668, 121213, 20230215
    Link to Paper Search Results by DOI
  14. Preparation of urea- and isocyanurate-containing polysilsesquioxane membranes for CO2 separation, JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 106(1), 149-157, 20221217
    Link to Paper Search Results by DOI
  15. Synthesis of thiazole-condensed germoles with enhanced electron-deficient properties, DYES AND PIGMENTS, 203, 110333, 20220426
    Link to Paper Search Results by DOI
  16. Development of Highly Water-Permeable Robust PSQ-Based RO Membranes by Introducing Hydroxyethylurea-Based Hydrophilic Water Channels, ACS APPLIED MATERIALS & INTERFACES, 14(18), 21426-21435, 20220511
    Link to Paper Search Results by DOI
  17. Development of robust and high-performance polysilsesquioxane reverse osmosis membranes modified by SiO2 nanoparticles for water desalination, SEPARATION AND PURIFICATION TECHNOLOGY, 296, 121421, 20220901
    Link to Paper Search Results by DOI
  18. Synthesis of D-A polymers with a disilanobithiophene donor and a pyridine or pyrazine acceptor and their applications to dyesensitized solar cells, RSC ADVANCES, 5(46), 36673-36679, 2015
  19. Synthesis and Properties of Benzofuran-Fused Silole and Germole Derivatives: Reversible Dimerization and Crystal Structures of Monomers and Dimers, ORGANOMETALLICS, 35(14), 2327-2332, 2016
  20. ★, Synthesis of organic photosensitizers containing dithienogermole and thiadiazolo[3,4-c]pyridine units for dye-sensitized solar cells, DALTON TRANSACTIONS, 45(35), 13817-13826, 2016
  21. Development of type-I/type-II hybrid dye sensitizer with both pyridyl group and catechol unit as anchoring group for type-I/type-II dye-sensitized solar cell, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 18(44), 30662-30676, 2016
  22. Synthesis of pentamethyldisilanyl-substituted starlike molecule with triazine core and its application to dye-sensitized solar cells, JOURNAL OF ORGANOMETALLIC CHEMISTRY, 825, 63-68, 2016
  23. Dithienogermole-containing D-pi-A-pi-A Photosensitizers for Dye-sensitized Solar Cells, CHEMISTRY LETTERS, 46(3), 310-312, 2017
  24. Synthesis, optical and electrochemical properties, and photovoltaic performance of a panchromatic and near-infrared (D)(2-pi-A) type BODIPY dye with pyridyl group or cyanoacrylic acid, RSC ADVANCES, 7(22), 13072-13081, 2017
  25. Preparation of Dithienogermole-containing Polysilsesquioxane Films for Sensing Nitroaromatics, CHEMISTRY LETTERS, 46(4), 438-441, 2017
  26. Synthesis of dithienogermole-containing polythiophenes, SYNTHETIC METALS, 227, 87-92, 2017
  27. Studies on Spherically Distributed LUMO and Electron-Accepting Properties of Caged Hexakis(germasesquioxanes), ORGANOMETALLICS, 36(14), 2536-2540, 2017
  28. ★, Hybrid conjugated polymers with alternating dithienosilole or dithienogermole and tricoordinate boron units, POLYMER CHEMISTRY, 9(3), 291-299, 20180121
  29. Modification of TiO2 Surface by Disilanylene Polymers and Application to Dye-Sensitized Solar Cells, INORGANICS, 6(1), 3, 20171226
  30. ★, Synthesis and Properties of Benzo[d]dithieno[b,f]borepins, ORGANOMETALLICS, 37(6), 869-881, 20180221
  31. Optical and Photosensitizing Properties of Spiro (dipyridinogermole)(dithienogermole)s with Eletron-Donating Amino and Electron-Withdrawing Pyridinothiadiazole Substituents, CHEMISTRYSELECT, 3(30), 8604-8609, 20180808
  32. Hydrophobic modification of SiO2 surface by aminosilane derivatives, COMPOSITE INTERFACES, 26(1), 15-25, 20190426
    Link to Paper Search Results by DOI
  33. Hydrophobic modification of SiO2 surface with disilanobiphenyl and disilanobithiophene and the application to pentacene-based organic transistors, COMPOSITE INTERFACES, 26(3), 221-231, 20190304
    Link to Paper Search Results by DOI
  34. Preparation and reactions of 4,4-dilithiodithienogermole, JOURNAL OF ORGANOMETALLIC CHEMISTRY, 883, 47-51, 20190315
    Link to Paper Search Results by DOI
  35. ★, Intramolecular Energy Transfer in Dithienogermole Derivatives, CHEMISTRY-A EUROPEAN JOURNAL, 25(19), 4974-4983, 20190401
    Link to Paper Search Results by DOI
  36. Synthesis, Properties, and Complex Formation of Antimony- and Bismuth-Bridged Bipyridyls, ORGANOMETALLICS, 38(7), 1516-1523, 20190408
    Link to Paper Search Results by DOI
  37. Synthesis of Pyridinothienogermoles as Unsymmetrically Condensed Germoles, ORGANOMETALLICS, 38(7), 1606-1613, 20190408
    Link to Paper Search Results by DOI
  38. Luminescent Di- and Tetranuclear Gold Complexes of Bis(diphenylphosphinyl)-Functionalized Dipyrido-Annulated N-Heterocyclic Carbene, INORGANIC CHEMISTRY, 58(9), 6328-6335, 20190506
    Link to Paper Search Results by DOI
  39. Bis(diphenylphosphinyl)-functionalized dipyrido-annulated NHC towards copper(i) and silver(i), DALTON TRANSACTIONS, 48(32), 12250-12256, 20190828
    Link to Paper Search Results by DOI
  40. Helical assembly of a dithienogermole exhibiting switchable circularly polarized luminescence, CHEMICAL COMMUNICATIONS, 55(71), 10607-10610, 20190914
    Link to Paper Search Results by DOI
  41. Synthesis and optical properties of polymers with bithiophene condensed with disilacyclohexadiene rings and benzothiadiazole, JOURNAL OF ORGANOMETALLIC CHEMISTRY, 900, 20191101
    Link to Paper Search Results by DOI
  42. Direct comparison of dithienosilole and dithienogermole as pi-conjugated linkers in photosensitizers for dye-sensitized solar cells, DALTON TRANSACTIONS, 48(44), 16671-16678, 20191128
    Link to Paper Search Results by DOI
  43. NIR-shielding films based on PEDOT-PSS/polysiloxane and polysilsesquioxane hybrid, JOURNAL OF APPLIED POLYMER SCIENCE, 137(7), 20200215
    Link to Paper Search Results by DOI
  44. Synthesis of nonplanar bipyridyls bridged by disilane and disiloxane and their phosphorescent copper complexes, APPLIED ORGANOMETALLIC CHEMISTRY, 34(1), 20200111
    Link to Paper Search Results by DOI
  45. The Substituent Effect of Bridged Triarylamine Helicenes on Light-emitting and Charge Transfer Properties, CHEMISTRY LETTERS, 49(5), 457-460, 20200227
    Link to Paper Search Results by DOI
  46. Synthesis and optical properties of compounds via platinum-catalyzed hydrosilylation of triethynyltriazine and silyl-substituted oligothiophenes, JOURNAL OF ORGANOMETALLIC CHEMISTRY, 917, 121275, 20200409
    Link to Paper Search Results by DOI
  47. ★, Extended conjugated borenium dimers via late stage functionalization of air-stable borepinium ions, CHEMICAL COMMUNICATIONS, 56(38), 5119-5122, 20200416
    Link to Paper Search Results by DOI
  48. Synthesis and properties of hypervalent electron-rich pentacoordinate nitrogen compounds, CHEMICAL SCIENCE, 11(19), 5082-5088, 20200422
    Link to Paper Search Results by DOI
  49. Synthesis of spiro(dipyridinogermole)(dithienogermole)-copper complexes, JOURNAL OF ORGANOMETALLIC CHEMISTRY, 921, 121297, 20200520
    Link to Paper Search Results by DOI
  50. Crystal Structures and Phosphorescent Properties of Group 14 Dipyridinometalloles and Their Copper Complexes, CHEMPLUSCHEM, 85(8), 1912-1918, 20200826
    Link to Paper Search Results by DOI
  51. Optical Properties of Silicon Nanosheets Modified with Triphenylamine and Quinoline Units: Charge and Energy Transfer from Conjugated Substituents to the Catenated Silicon Backbone, JOURNAL OF PHYSICAL CHEMISTRY C, 124(31), 17347-17351, 20200708
    Link to Paper Search Results by DOI
  52. Photo-energy Transfer in sigma-pi Conjugated Polysilanes Prepared by Platinum-catalyzed Reactions of Arylacetylenes with Layered Polysilane, CHEMISTRY LETTERS, 49(10), 1174-1177, 20200704
    Link to Paper Search Results by DOI
  53. Synthesis of spiro(dipyridinogermole)(dithienogermole)-copper complexes, JOURNAL OF ORGANOMETALLIC CHEMISTRY, 921, 121297, 20200520
  54. Optical Properties of Silicon Nanosheets Modified with Triphenylamine and Quinoline Units: Charge and Energy Transfer from Conjugated Substituents to the Catenated Silicon Backbone, JOURNAL OF PHYSICAL CHEMISTRY C, 124(31), 17347-17351, 20200708
  55. Complexation of B(C6F5)(3) and 9,10-Dicyanoanthracene: Dual Role of Borane as Spatial and Electronic Tuner, CHEMISTRY LETTERS, 49(9), 1022-1025, 202009
    Link to Paper Search Results by DOI
  56. Complexation of B(C6F5)(3) and 9,10-Dicyanoanthracene: Dual Role of Borane as Spatial and Electronic Tuner, CHEMISTRY LETTERS, 49(9), 1022-1025, 2020
  57. Photo-energy Transfer in sigma-pi Conjugated Polysilanes Prepared by Platinum-catalyzed Reactions of Arylacetylenes with Layered Polysilane, CHEMISTRY LETTERS, 49(10), 1174-1177, 20200704
  58. ★, Thiophene-based twisted bistricyclic aromatic ene with tricoordinate boron: a new n-type semiconductor, CHEMICAL COMMUNICATIONS, 57(11), 20210113
  59. ★, Optical Characteristics of Hybrid Macrocycles with Dithienogermole and Tricoordinate Boron Units, CHEMISTRY-A EUROPEAN JOURNAL, 27(10), 3306-3314, 20210202
  60. Synthesis of spirodithienogermole with triphenylamine units as a dopant-free hole-transporting material for perovskite solar cells, JOURNAL OF MATERIALS CHEMISTRY C, 9(6), 2001-2007, 20210108
  61. ★, Effect of the conjugation pathway on the electronic structures of p-pi* conjugated polymers with fused borepin units, POLYMER CHEMISTRY, 12(23), 3471-3477, 20210621
    Link to Paper Search Results by DOI
  62. Preparation of polysilsesquioxane reverse osmosis membranes for water desalination from tris[(ethoxysilyl)alkyl]amines by sol-gel process and interfacial polymerization, APPLIED ORGANOMETALLIC CHEMISTRY, 35(11), e6374, 20210718
    Link to Paper Search Results by DOI
  63. Synthesis and optical properties of disiloxane-linked decathiophene and dodecathiophene polymers, POLYMER JOURNAL, 54(1), 91-96, 20210924
    Link to Paper Search Results by DOI
  64. Development of Highly Water-Permeable Robust PSQ-Based RO Membranes by Introducing Hydroxyethylurea-Based Hydrophilic Water Channels, ACS APPLIED MATERIALS & INTERFACES, 14(18), 21426-21435, 20220429
  65. Development of PSQ-RO membranes with high water permeability by copolymerization of bis[3-(triethoxysilyl)propyl]amine and triethoxy (3-glycidyloxypropyl)silane, JOURNAL OF MEMBRANE SCIENCE, 644, 120162, 20220215
    Link to Paper Search Results by DOI
  66. m-Phenylene linked macrocycle composed of electron-rich dithienogermole and electron-deficient tricoordinate boron units, POLYMER, 239, 124404, 20220117
    Link to Paper Search Results by DOI
  67. Optical Properties of Boron-Incorporated Analogues of Tetrathienoanthracene, ORGANOMETALLICS, 41(10), 1225-1231, 20220523
    Link to Paper Search Results by DOI
  68. Preparation of amine- and ammonium-containing polysilsesquioxane membranes for CO2 separation, POLYMER JOURNAL, 54(7), 875-882, 20220324
    Link to Paper Search Results by DOI

Publications such as books

  1. 2017/12/19, Main Group Strategies towards Functional Hybrid Materials, Germanium and Tin in Conjugated Organic Materials, Wiley, 2017, 12, Scholarly Book, Joint work, English, Y Adachi, J Ohshita, 9781119235972, 515

Invited Lecture, Oral Presentation, Poster Presentation

  1. Optical Properties of Conjugated 7- and 6-Membered Ring Systems with Boron, Yohei Adachi, 2022 Japan-US nanohybrid workshop, 2022/11/29, With Invitation, English, Prof. Joji Ohshita, Hiroshima University Prof. Takahiro Gunji , Tokyo Science University Prof. Yoshiro Kaneko, Kagoshima University Prof. Kevin Noonan , Carnegie Mellon University Prof. Jeffrey Pyun , The University of Arizona, Mishima, Japan
    Related URL

Awards

  1. 2018/12/21, IPC2018 Poster Award: NPG Asia Materials Award, IPC2018, Synthesis and Properties of Benzo[d]dithieno[b,f]borepins and Their Polymers

External Funds

Acceptance Results of Competitive Funds

  1. 2023/04, 2024/03
  2. KAKENHI(Grant-in-Aid for Early-Career Scientists), 2022, 2023
  3. Adaptable and Seamless Technology transfer Program through targetdriven R&D(A-STEP), 2022//1/0/, 2024//0/3/
  4. Grant-in-Aid for Early-Career Scientists, Development of organic chromic materials utilizing the characteristics of heteroatoms, 2022/04/01, 2024/03/31
  5. Adaptable and Seamless Technology transfer Program through targetdriven R&D(A-STEP), 2020/11/02, 2022/03/31
  6. 2021/10, 2022/09
  7. Adaptable and Seamless Technology transfer Program through targetdriven R&D(A-STEP), 2020/11/02, 2022/03/31
  8. 2020, 2021
  9. 2018/04/01, 2019/03/31
  10. KAKENHI(Grant-in-Aid for Early-Career Scientists), 2019, 2021
  11. KAKENHI(Grant-in-Aid for Research Activity Start-up), 2017, 2018

Social Activities

History as Peer Reviews of Academic Papers

  1. 2023, International Journal of Polymer Analysis and Characterization, Others, 1
  2. 2023, Polymer Journal, Others, 1
  3. 2023, Inorg. Chem., Others, 1
  4. 2023, Aggregate, Others, 1
  5. 2023, Chem. Eur. J, Others, 1
  6. 2023, J. Photochem. Photobiol. A, Others, 1
  7. 2023, Asian Journal of Organic Chemistry, Others
  8. 2022, Organic Letters, Others, 1
  9. 2022, European Journal of Organic Chemistry, Others, 1
  10. 2022, Aggregate, Others, 1
  11. 2022, ACS Appl. Energy Mater., Others, 2
  12. 2021, Chem. Asian. J, Others, 1
  13. 2021, Polymer Journal, Others, 1
  14. 2020, Chem. Eur. J, Others, 1
  15. 2020, New Journal of Chemistry, Others, 1
  16. 2020, J. Photochem. Photobiol. A, Others, 2