EIICHI KAYAHARA

Last Updated :2026/07/06

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Professor (Special Recognition)
Web Site
https://hiu-roc.webnode.jp
E-mail
kayaharahiroshima-u.ac.jp
Other Contact Details
1–3–1 Kagamiyama, Higashi-Hiroshima, Hiroshima, Japan, Japan
TEL : (+81)82-424-7417 FAX : (+81)

Basic Information

Major Professional Backgrounds

  • 2008, 2011, Japan Society for the Promotion of Science, JSPS Research Fellowship for Young Scientists (DC1)
  • 2011, 2014, Kyoto University, Institute for Chemical Research, Program-Specific Assistant Professor
  • 2014, 2025, Kyoto University, Institute for Chemical Research, Assistant Professor
  • 2022, 2025, Kyoto University, FusionPI
  • 2025, Hiroshima University, Graduate School of Advanced Science and Engineering, Associate Professor
  • 2025, Hiroshima University, Graduate School of Advanced Science and Engineering, Professor (Special Recognition)

Educational Backgrounds

  • Osaka City University, Department of Chemistry, Japan, 2006
  • Osaka City University, Graduate School of Science, Department of Molecular Materials Science, Japan, 2008
  • Kyoto University, Graduate School of Engineering, Department of Polymer Chemistry, Japan, 2011

Academic Degrees

  • Osaka City University
  • Kyoto University

Affiliated Academic Societies

  • KINKA CHEMICAL SOCIETY
  • The Society of Polymer Science, Japan
  • The Chemical Society of Japan

Educational Activity

Course in Charge

  1. 2026, Undergraduate Education, First Semester, Special Study for Graduation
  2. 2026, Undergraduate Education, Second Semester, Special Study for Graduation
  3. 2026, Undergraduate Education, First Semester, Chemical Experiments I
  4. 2026, Undergraduate Education, Second Semester, Chemical Experiments II
  5. 2026, Undergraduate Education, 3Term, Analytical Organic Chemistry
  6. 2026, Graduate Education (Master's Program) , 1Term, Introduction to Organic Chemistry
  7. 2026, Graduate Education (Master's Program) , First Semester, Exercises in Chemistry A
  8. 2026, Graduate Education (Master's Program) , Second Semester, Exercises in Chemistry B
  9. 2026, Graduate Education (Master's Program) , Year, Master's Thesis in Chemistry

Research Activities

Academic Papers

  1. Revisiting the Photodegradation of the o-Nitrobenzyl Group via Elucidation of the Stability and Reactivity of o-Nitrosobenzaldehyde, Journal of Organic Chemistry, 91(23), 7799-7806, 20260601
  2. Carbenes Embedded in Cyclic Paraphenylenes: Detection, Ground-State Spin Multiplicity, and Mobius Aromaticity, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 148(6), 6544-6550, 20260218
  3. ★, Synthesis and Physical Properties of [n]Cycloparaphenylene Ketone (n = 6, 7, 8, and 10), Angewandte Chemie - International Edition, 20250611
  4. Synthesis of Octatrimethylsilyl-[8]cycloparaphenylene for Multifunctionalized Cycloparaphenylene, Journal of Organic Chemistry, 90(26), 8959-8965, 20250704
  5. ★, Synthesis of pi-Extended [1.1]Paracyclophanes, [1.1][n]PCP (n=2, 3, and 4), and Their Through-Space Conjugation, Chemistry - A European Journal, 31(1), 20250102
  6. Higher conductivity in doped ethylenedioxythiophene (EDOT) dimers with chalcogen-substituted end groups, Journal of Materials Chemistry C, 12(35), 13956-13965, 20240807
  7. Enhanced host–guest interaction between [10]cyclopara-phenylene ([10]CPP) and [5]CPP by cationic charges, Beilstein Journal of Organic Chemistry, 20, 436-444, 20240101
  8. ★, Synthesis and physical properties of doubly-annulated [10]cycloparaphenylene, Bulletin of the Chemical Society of Japan, 97(1), 20240101
  9. Synthesis and characterization of novel hydrodigermenide and digermyne radical anion, Polyhedron, 244, 20231101
  10. Generation and Characterization of a Tetraradical Embedded in a Curved Cyclic Paraphenylene Unit, Chemistry - A European Journal, 29(42), 20230726
  11. A Donor-Acceptor 10-Cycloparaphenylene and Its Use as an Emitter in an Organic Light-Emitting Diode, Organic Letters, 25(6), 998-1002, 20230217
  12. Synthesis of Twisted [n]Cycloparaphenylene by Alkene Insertion, Angewandte Chemie - International Edition, 62(2), 20230109
  13. Dynamic Au-C σ-Bonds Leading to an Efficient Synthesis of [ n]Cycloparaphenylenes (n = 9-15) by Self-Assembly, JACS Au, 2(8), 1857-1868, 20220822
  14. 1,3-Diradicals Embedded in Curved Paraphenylene Units: Singlet versus Triplet State and In-Plane Aromaticity, Journal of the American Chemical Society, 143(19), 7426-7439, 20210519
  15. Synthesis and Properties of a Cyclohexa-2,7-anthrylene Ethynylene Derivative, Angewandte Chemie - International Edition, 60(2), 998-1003, 20210111
  16. Ultrafast Exciton Self-Trapping and Delocalization in Cycloparaphenylenes: The Role of Excited-State Symmetry in Electron-Vibrational Coupling, Angewandte Chemie - International Edition, 59(39), 16989-16996, 20200921
  17. Syntheses of Tetrasubstituted [10]Cycloparaphenylenes by a Pd-catalyzed Coupling Reaction. Remarkable Effect of Strain on the Oxidative Addition and Reductive Elimination, Chemistry - An Asian Journal, 15(16), 2451-2455, 20200817
  18. Selective and gram-scale synthesis of [8]cycloparaphenylene, Journal of Organic Chemistry, 85(4), 2082-2091, 20200221
  19. Ultrafast Exciton Self-Trapping and Delocalization in Cycloparaphenylenes: The Role of Excited-State Symmetry in Electron-Vibrational Coupling, Angewandte Chemie International Edition, 59(39), 16989-16996, 20200921
  20. Size-Dependent Relaxation Processes of Photoexcited [n]Cycloparaphenylenes (n = 5-12): Significant Contribution of Internal Conversion in Smaller Rings, Journal of Physical Chemistry A, 123(22), 4737-4742, 20190606
  21. Synthesis and reactions of carbon nanohoop, Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry, 77(11), 1147-1158, 20190101
  22. Synthesis and Physical Properties of Polyfluorinated Cycloparaphenylenes, Organic Letters, 20(18), 5973-5976, 20180921
  23. ★, Strain-Induced Double Carbon–Carbon Bond Activations of Cycloparaphenylenes by a Platinum Complex: Application to the Synthesis of Cyclic Diketones, Angewandte Chemie - International Edition, 57(35), 11418-11421, 20180827
  24. Near-Infrared Fluorescence from In-Plane-Aromatic Cycloparaphenylene Dications, Journal of Physical Chemistry A, 122(23), 5162-5167, 20180614
  25. Short-step synthesis of large cycloparaphenylenes, Chemistry Letters, 47(9), 1108-1111, 20180101
  26. Significant structural relaxations of excited [: N] cycloparaphenylene dications (n = 5-9), Physical Chemistry Chemical Physics, 20(46), 29207-29211, 20180101
  27. Gram-Scale Syntheses and Conductivities of [10]Cycloparaphenylene and Its Tetraalkoxy Derivatives, Journal of the American Chemical Society, 139(51), 18480-18483, 20171227
  28. Bromination of Cycloparaphenylenes: Strain-Induced Site-Selective Bis-Addition and Its Application for Late-Stage Functionalization, Angewandte Chemie - International Edition, 56(35), 10428-10432, 20170821
  29. Shortest Double-Walled Carbon Nanotubes Composed of Cycloparaphenylenes, ChemPlusChem, 82(7), 1015-1020, 20170801
  30. Synthesis and physical properties of [4]cyclo-3,7-dibenzo[ b, d ]thiophene and its S, S-dioxide, Canadian Journal of Chemistry, 95(4), 351-356, 20170101
  31. Size Dependence of [n]Cycloparaphenylenes (n=5–12) in Electrochemical Oxidation, Chemistry - An Asian Journal, 11(12), 1793-1797, 20160621
  32. Tetracyclo(2,7-carbazole)s: Diatropicity and Paratropicity of Inner Regions of Nanohoops, Journal of Organic Chemistry, 81(8), 3356-3363, 20160415
  33. Synthesis and Characterization of [n]CPP (n = 5, 6, 8, 10, and 12) Radical Cation and Dications: Size-Dependent Absorption, Spin, and Charge Delocalization, Journal of the American Chemical Society, 138(1), 338-344, 20160113
  34. Regioselective Synthesis and Characterization of Multinuclear Convex-Bound Ruthenium-[n]Cycloparaphenylene (n=5 and 6) Complexes, Angewandte Chemie - International Edition, 55(1), 302-306, 20160104
  35. Ligand-Controlled Synthesis of [3]- and [4]Cyclo-9,9-dimethyl-2,7-fluorenes through Triangle- and Square-Shaped Platinum Intermediates, Chemistry - A European Journal, 21(52), 18939-18943, 20151221
  36. Selective and Gram-Scale Synthesis of [6]Cycloparaphenylene, Synlett, 26(11), 1615-1619, 20150701
  37. Radical ions of cyclopyrenylene: Comparison of spectral properties with cycloparaphenylene, Journal of Physical Chemistry A, 119(18), 4136-4141, 20150507
  38. Practical Synthesis of [n]Cycloparaphenylenes (n=5, 7-12) by H2SnCl4-mediated aromatization of 1,4-dihydroxycyclo-2,5-diene Precursors, Chemistry - A European Journal, 21(15), 5742-5749, 20150407
  39. In-plane aromaticity in cycloparaphenylene dications: A magnetic circular dichroism and theoretical study, Journal of the American Chemical Society, 137(1), 82-85, 20150114
  40. Cycloparaphenylenes and Carbon Nanorings, Polycyclic Arenes and Heteroarenes: Synthesis, Properties, and Applications, 143-162, 20150101
  41. New organic chemistry of three-dimensional π-conjugated compounds, Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry, 72(9), 992-1005, 20140901
  42. Radical ions of cycloparaphenylenes: Size dependence contrary to the neutral molecules, Journal of Physical Chemistry Letters, 5(13), 2302-2305, 20140703
  43. Synthesis, characterization, and properties of [4]cyclo-2,7-pyrenylene: Effects of cyclic structure on the electronic properties of pyrene oligomers, Angewandte Chemie - International Edition, 53(25), 6430-6434, 20140616
  44. Synthesis and characterization of [5]cycloparaphenylene, Journal of the American Chemical Society, 136(6), 2284-2287, 20140212
  45. Organoplatinum-mediated synthesis of cyclic π-conjugated molecules: Towards a new era of three-dimensional aromatic compounds, Chemical Record, 14(1), 84-100, 20140101
  46. Isolation and characterization of the cycloparaphenylene radical cation and dication, Angewandte Chemie - International Edition, 52(51), 13722-13726, 20131216
  47. Synthesis and physical properties of a ball-like three-dimensional π-conjugated molecule, Nature Communications, 4, 20131111
  48. Selective synthesis of [6]-, [8]-, and [10]cycloparaphenylenes, Chemistry Letters, 42(6), 621-623, 20130612
  49. Enhancement of the quinoidal character for smaller [n]cycloparaphenylenes probed by Raman spectroscopy, ChemPhysChem, 14(8), 1570-1572, 20130603
  50. Substituent effect on the antimony atom in organostibine-mediated living radical polymerization, Heteroatom Chemistry, 22(3-4), 307-315, 20110406
  51. Synthesis of structurally well-controlled ω-vinylidene functionalized poly(alkyl methacrylate)s and polymethacrylonitrile by organotellurium, organostibine, and organobismuthine-mediated living radical polymerizations, Reactive and Functional Polymers, 69(7), 416-423, 20090701
  52. Development of an arylthiobismuthine cocatalyst in organobismuthine- mediated living radical polymerization: Applications for synthesis of ultrahigh molecular weight polystyrenes and polyacrylates, Journal of the American Chemical Society, 131(7), 2508-2513, 20090225
  53. Synthesis of structurally well-defined telechelic polymers by OrganostibineMediated living radical polymerization: In situ generation of functionalized chain-transfer agents and selective ω-end-group transformations, Chemistry - A European Journal, 15(4), 1018-1029, 20090112
  54. Optimization of Organotellurium Transfer Agents for Highly Controlled Living Radical Polymerization, Macromolecules, 41(3), 527-529, 20080115
  55. Highly controlled living radical polymerization through dual activation of organobismuthines, Angewandte Chemie - International Edition, 46(8), 1304-1306, 20070702
  56. The examination of carbon nanotubes as an electrode material for fabrication of biosensors, Polymer Preprints, Japan, 55(1), 20061019
  57. Effects of organotellanyl groups on the degenerative chain transfer reaction of organotellurium compounds with carbon-centered radicals, Polymer Preprints, Japan, 55(1), 20061018