EIICHI KAYAHARA

Last Updated :2025/06/04

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Associate Professor
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)

Educational Activity

Course in Charge

  1. 2025, Undergraduate Education, First Semester, Special Study for Graduation
  2. 2025, Undergraduate Education, Second Semester, Special Study for Graduation

Research Activities

Academic Papers

  1. Synthesis of π-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
  2. Higher conductivity in doped ethylenedioxythiophene (EDOT) dimers with chalcogen-substituted end groups, Journal of Materials Chemistry C, 12(35), 13956-13965, 20240807
  3. 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
  4. Synthesis and physical properties of doubly-annulated [10] cycloparaphenylene, Bulletin of the Chemical Society of Japan, 97(1), 20240101
  5. Synthesis and characterization of novel hydrodigermenide and digermyne radical anion, Polyhedron, 244, 20231101
  6. Generation and Characterization of a Tetraradical Embedded in a Curved Cyclic Paraphenylene Unit, Chemistry - A European Journal, 29(42), 20230726
  7. A Donor-Acceptor 10-Cycloparaphenylene and Its Use as an Emitter in an Organic Light-Emitting Diode, Organic Letters, 25(6), 998-1002, 20230217
  8. Synthesis of Twisted [n]Cycloparaphenylene by Alkene Insertion, Angewandte Chemie - International Edition, 62(2), 20230109
  9. 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
  10. 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
  11. Synthesis and Properties of a Cyclohexa-2,7-anthrylene Ethynylene Derivative, Angewandte Chemie - International Edition, 60(2), 998-1003, 20210111
  12. 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
  13. 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
  14. Selective and gram-scale synthesis of [8]cycloparaphenylene, Journal of Organic Chemistry, 85(4), 2082-2091, 20200221
  15. 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
  16. Synthesis and reactions of carbon nanohoop, Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry, 77(11), 1147-1158, 20190101
  17. Synthesis and Physical Properties of Polyfluorinated Cycloparaphenylenes, Organic Letters, 20(18), 5973-5976, 20180921
  18. 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
  19. Near-Infrared Fluorescence from In-Plane-Aromatic Cycloparaphenylene Dications, Journal of Physical Chemistry A, 122(23), 5162-5167, 20180614
  20. Short-step synthesis of large cycloparaphenylenes, Chemistry Letters, 47(9), 1108-1111, 20180101
  21. Significant structural relaxations of excited [: N] cycloparaphenylene dications (n = 5-9), Physical Chemistry Chemical Physics, 20(46), 29207-29211, 20180101
  22. Gram-Scale Syntheses and Conductivities of [10]Cycloparaphenylene and Its Tetraalkoxy Derivatives, Journal of the American Chemical Society, 139(51), 18480-18483, 20171227
  23. 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
  24. Shortest Double-Walled Carbon Nanotubes Composed of Cycloparaphenylenes, ChemPlusChem, 82(7), 1015-1020, 20170801
  25. Shortest Double-Walled Carbon Nanotubes Composed of Cycloparaphenylenes, ChemPlusChem, 82(7), 20170801
  26. 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
  27. Size Dependence of [n]Cycloparaphenylenes (n=5–12) in Electrochemical Oxidation, Chemistry - An Asian Journal, 11(12), 1793-1797, 20160621
  28. Tetracyclo(2,7-carbazole)s: Diatropicity and Paratropicity of Inner Regions of Nanohoops, Journal of Organic Chemistry, 81(8), 3356-3363, 20160415
  29. 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
  30. 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
  31. 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
  32. Selective and Gram-Scale Synthesis of [6]Cycloparaphenylene, Synlett, 26(11), 1615-1619, 20150701
  33. Radical ions of cyclopyrenylene: Comparison of spectral properties with cycloparaphenylene, Journal of Physical Chemistry A, 119(18), 4136-4141, 20150507
  34. 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
  35. In-plane aromaticity in cycloparaphenylene dications: A magnetic circular dichroism and theoretical study, Journal of the American Chemical Society, 137(1), 82-85, 20150114
  36. Cycloparaphenylenes and Carbon Nanorings, Polycyclic Arenes and Heteroarenes: Synthesis, Properties, and Applications, 143-162, 20150101
  37. New organic chemistry of three-dimensional π-conjugated compounds, Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry, 72(9), 992-1005, 20140901
  38. Radical ions of cycloparaphenylenes: Size dependence contrary to the neutral molecules, Journal of Physical Chemistry Letters, 5(13), 2302-2305, 20140703
  39. 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
  40. Synthesis and characterization of [5]cycloparaphenylene, Journal of the American Chemical Society, 136(6), 2284-2287, 20140212
  41. Organoplatinum-mediated synthesis of cyclic π-conjugated molecules: Towards a new era of three-dimensional aromatic compounds, Chemical Record, 14(1), 84-100, 20140101
  42. Isolation and characterization of the cycloparaphenylene radical cation and dication, Angewandte Chemie - International Edition, 52(51), 13722-13726, 20131216
  43. Synthesis and physical properties of a ball-like three-dimensional π-conjugated molecule, Nature Communications, 4, 20131111
  44. Selective synthesis of [6]-, [8]-, and [10]cycloparaphenylenes, Chemistry Letters, 42(6), 621-623, 20130612
  45. Enhancement of the quinoidal character for smaller [n]cycloparaphenylenes probed by Raman spectroscopy, ChemPhysChem, 14(8), 1570-1572, 20130603
  46. Substituent effect on the antimony atom in organostibine-mediated living radical polymerization, Heteroatom Chemistry, 22(3-4), 307-315, 20110406
  47. 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
  48. 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
  49. 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
  50. Highly controlled living radical polymerization through dual activation of organobismuthines, Angewandte Chemie - International Edition, 46(8), 1304-1306, 20070702
  51. The examination of carbon nanotubes as an electrode material for fabrication of biosensors, Polymer Preprints, Japan, 55(1), 20061019
  52. Effects of organotellanyl groups on the degenerative chain transfer reaction of organotellurium compounds with carbon-centered radicals, Polymer Preprints, Japan, 55(1), 20061018
  53. Optimization of Organotellurium Transfer Agents for Highly Controlled Living Radical Polymerization, Macromolecules, 41(3), 527-529, 20080115