Publication / Tomoyuki Ikai : Yashima lab

日本語（in Japanese）

Published papers

91. 2,2'-Tethered Binaphthyl-Embedded One-Handed Helical Ladder Polymers: Impact of the Tether Length on Helical Geometry and Chiroptical Property: T. Ikai, N. Mishima, T. Matsumoto, S. Miyoshi, K. Oki, and E. Yashima; Angew. Chem., Int. Ed., 63, e202318712 (2024) DOI: 10.1002/anie.202318712. (Open Access)
Selected as VIP paper

90. Tandem Isomerization/α,β-Site-Selective and Enantioselective Addition Reactions of N-(3-Butynoyl)-3,5-dimethylpyrazole Induced by Chiral -Cu(II) Catalysts: W. Guo, M. Hori, Y. Ogura, K. Nishimura, K. Oki, T. Ikai, E. Yashima, and K. Ishihara; J. Am. Chem. Soc., 145, 27080-27088 (2023) DOI: 10.1021/jacs.3c10820. (Open Access)

89. Secondary Structure Modulation of Triptycene-Based One-Handed Helical Ladder Polymers through -Extension of Achiral Segments: T. Ikai, A. Tanaka, T. Shiotani, K. Oki, and E. Yashima; Org. Mater., 5, 184-190 (2023) DOI: 10.1055/a-2208-4389. (Open Access)
Special Issue on "Soluble Graphene Nanoarchitectures"

88. Control of One-Handed Helicity in Polyacetylenes: Impact of an Extremely Small Amount of Chiral Substituents: T. Ikai, Y. Morita, T. Majima, S. Takeda, R. Ishidate, K. Oki, N. Suzuki, H. Ohtani, H. Aoi, K. Maeda, K. Okoshi, and E. Yashima; J. Am. Chem. Soc., 145, 24862-24876 (2023) DOI: 10.1021/jacs.3c09308. (Open Access)

87. Optically-Pure Triptycene-Based Metallomacrocycles and Homochiral Self-Sorting Assisted by Ladder Formation: K. Oki, W. Zheng, E. Yashima, and T. Ikai; Chem. Commun., 59, 8989-8992 (2023), DOI: 10.1039/D3CC02259E. (Open Access)

86. One-Handed Helical Polyacetylenes Bearing Axially-Chiral 2-Arylpyridyl-N-Oxide Units for Efficient Chromatographic Enantioseparation of Chiral Aromatic and Aliphatic Alcohols: T. Ikai, M. Ito, K. Oki, N. Suzuki, and Eiji Yashima; Angew. Chem., Int. Ed., 62, e202306252 (2023) DOI: 10.1002/anie.202306252.
Selected as VIP paper

85. Remote Control of One-Handed Helicity in Polyacetylenes through Flexible Spacers in Water: Impact of the Spacer Length: T. Ikai, K. Nakamura, K. Mizumoto, K. Oki, and E. Yashima; Angew. Chem., Int. Ed., 62, e202301127 (2023) DOI: 10.1002/anie.202301127.
Selected as VIP paper

84. Defect-Free Synthesis of a Fully -Conjugated Helical Ladder Polymer and Resolution into a Pair of Enantiomeric Helical Ladders: T. Ikai, S. Miyoshi, K. Oki, R. Saha, Y. Hijikata, and E. Yashima; Angew. Chem., Int. Ed., 62, e202301962 (2023) DOI: 10.1002/anie.202301962.
Selected as VIP paper

83. Stereospecific Synthesis of Enantiopure [6]Helicene Containing a Seven-Membered Ring and [7]Helicene via Acid-Promoted Stepwise Alkyne Annulations of Doubly Axial-Chiral Precursors: T. Ikai, K. Oki, S. Yamakawa, and E. Yashima; Angew. Chem., Int. Ed., 62, e202217020 (2023) DOI: 10.1002/anie.202301836. (Open Access)

82. One-Handed Helical Tubular Ladder Polymers for Chromatographic Enantioseparation: W. Zheng, K. Oki, R. Saha, Y. Hijikata, E. Yashima, and T. Ikai; Angew. Chem., Int. Ed. , 62, e202218297 (2023) DOI: 10.1002/anie.202218297. (Open Access)

81. Amplification of Macromolecular Helicity of Poly(biphenylylacetylene)s Composed of a Small Amount of Chiral [5]Helicene Units: T. Ikai, S. Anzai, K. Oki, and E. Yashima; J. Polym. Sci. , 61, 912-919 (2023) DOI: 10.1002/pol.20220658.
Special Issue in honor of the 65th birthday of Prof. Takuzo Aida

80. Chiral and Achiral Pendant-Bound Poly(biphenylylacetylene)s Bearing Amide and/or Carbamate Groups: One-Handed Helix Formations and Chiral Recognition Abilities: T. Ikai, S. Okuda, M. Aizawa, and E. Yashima; Macromolecules, 55, 7023-7031 (2022) DOI: 10.1021/acs.macromol.2c01362

79. Catalytic One-Handed Helix Induction and Subsequent Static Memory of Poly(biphenylylacetylene)s Assisted by a Small Amount of Carboxy Groups Introduced at the Pendants: T. Ikai, S. Takeda, and E. Yashima; ACS Macro Lett., 11, 525-531 (2022) DOI: 10.1021/acsmacrolett.2c00136 (Open Access)

78. Consecutively Fused Single-, Double-, and Triple-Expanded Helicenes: W. Zheng, T. Ikai, K. Oki, and E. Yashima; Natural Sci., 2, e20210047 (2022) DOI: 10.1002/ntls.20210047 (Open Access)
Video abstract is available online: https://onlinelibrary.wiley.com/doi/10.1002/ntls.20210047

77. Supramolecular Helical Assemblies of Dirhodium(II) Paddlewheels with 1,4-Diazabicyclo[2.2.2]octane: A Remarkable Substituent Effect on the Helical Sense Preference and Amplification of the Helical Handedness Excess of Metallo-Supramolecular Helical Polymers: S. Okuda, N. Ousaka, T. Iwata, R. Ishida, A. Urushima, N. Suzuki, S. Nagano, T. Ikai, and E. Yashima; J. Am. Chem. Soc., 144, 2775-2792 (2022) DOI: 10.1021/jacs.1c12652 (Open Access)

76. Macromolecular Helicity Induction and Static Helicity Memory of Poly(Biphenylylacetylene)s Bearing Aromatic Pendant Groups and Their Use as Chiral Stationary Phases for High-Performance Liquid Chromatography: T. Ikai, S. Okuda, and E. Yashima; Chirality, 34, 306-316 (2022) DOI: 10.1002/chir.23399
Special Issue in honor of the 80th birthday of Prof. Yoshio Okamoto

75. Emergence of Highly Enantioselective Catalytic Activity in a Helical Polymer Mediated by Deracemization of Racemic Pendants: T. Ikai, M. Ando, M. Ito, R. Ishidate, N. Suzuki, K. Maeda, and E. Yashima; J. Am. Chem. Soc., 143, 12725-12735 (2021) DOI: 10.1021/jacs.1c05620

74. Synthesis of Single-Handed Helical Spiro-Conjugated Ladder Polymers through Quantitative and Chemoselective Cyclizations: W. Zheng, T. Ikai, and E. Yashima; Angew. Chem., Int. Ed., 60, 11294-11299 (2021) DOI: 10.1002/anie.202102885
Selected as VIP paper

73. Water-Mediated Reversible Control of Three-State Double-Stranded Titanium(IV) Helicates: N. Ousaka, M. Itakura, A. Nagasaka, M. Ito, T. Hattori, D. Taura, T. Ikai, and E. Yashima; J. Am. Chem. Soc., 143, 4346-4358 (2021) DOI: 10.1021/jacs.0c13351

72. One-Step Simultaneous Synthesis of Circularly Polarized Luminescent Multiple Helicenes Using a Chrysene Framework: T. Ikai, S. Yamakawa, N. Suzuki, and E. Yashima; Chem. Asian J., 16, 769-774 (2021) DOI: 10.1002/asia.202100035
Selected as Front Cover

71. Racemic Monomer-Based One-Handed Helical Polymer Recognizes Enantiomers through Auto-Evolution of Its Helical Handedness Excess: T. Ikai, T. Kurake, S. Okuda, K. Maeda, and E. Yashima; Angew. Chem., Int. Ed., 60, 4625-4632 (2021) DOI: 10.1002/anie.202014946
Selected as VIP paper and Frontispiece

70. Chiral Amplification of Supramolecular Coassemblies of Chiral and Achiral Acylhydrazine-Functionalized Biphenyls and Their Copolymers: T. Ikai, S. Kawabata, S. Okuda, N. Ousaka, and E. Yashima; Polym. J., 53, 1475-1480 (2021) DOI: 10.1038/s41428-021-00550-7

69. Cellulose Phenylcarbamate-Derived Hybrid Bead-Type Chiral Packing Materials for Efficient Chiral Recognition: G. Li, X. Dai, Y. Min, C. Yu, T. Ikai, L. Zhang, J. Shen, and Y. Okamoto; Cellulose, 28, 347-358 (2021) DOI: 10.1007/s10570-020-03514-x

68. Peripherally Donor-Installed 7,8-Diaza[5]helicenes as a Platform for Helical Luminophores: Y. Takeda, P. Data, B. Esser, Y. Ikari, T. Kaihara, S. Goto, M. Bovenkerk, D.C. Grenz, M. Ferreira, P. Stachelek, T. Yoshida, T. Ikai, N. Tohnai, and S. Minakata; Synthesis, 53, 1584-1596 (2020) DOI: 10.1055/a-1343-5810

67. Chiral Guest-Induced Catalytic Deracemization of a Spiroborate-Based Double-Stranded Helicate Bearing a Bisporphyrin Unit with Acids: M. Ito, T. Ikai, S. Yamamoto, D. Taura, N. Ousaka, and E. Yashima; Chem. Lett., 49, 1030-1033 (2020) DOI: 10.1246/cl.200352
Selected as Editor’s Choice and Inside Cover

66. Helical Assemblies of One-Dimensional Supramolecular Polymers Composed of Helical Macromolecules: Generation of Circularly Polarized Light Using an Infinitesimal Chiral Source: T. Ikai, M. Okubo, and Y. Wada; J. Am. Chem. Soc., 142, 3254-3261 (2020) DOI: 10.1021/jacs.9b13584

65. Catalytic One-Handed Helix-Induction and Memory of Amphiphilic Poly(Biphenylylacetylene)s in Water: T. Ikai, K. Mizumoto, R. Ishidate, W. R. Kitzmann, R. Ikeda, C. Yokota, K. Maeda, and E. Yashima; Giant, 2, 100016 (2020) DOI: 10.1016/j.giant.2020.100016
Highlighted in Giant, 2, 10015 (2020) by Prof. R.-M. Ho.

64. Helix-Sense-Selective Encapsulation of Helical Poly(lactic acid)s within a Helical Cavity of Syndiotactic Poly(methyl methacrylate) with Helicity Memory: T. Ikai, S. Kawabata, F. Mamiya, D. Taura, N. Ousaka, and E. Yashima; J. Am. Chem. Soc., 142, 21913-21925 (2020) DOI: 10.1021/jacs.0c11204
Selected as Supplementary Cover

63. Chiral/Achiral Copolymers of Biphenylylacetylenes Bearing Various Substituents: Chiral Amplification through Copolymerization Followed by Enhancement/Inversion and Memory of the Macromolecular Helicity: T. Ikai, R. Ishidate, K. Inoue, J. Kaygisiz, K. Maeda, and E. Yashima; Macromolecules, 53, 973-981 (2020) DOI: 10.1021/acs.macromol.9b02727

62. Optically Active Triptycenes Containing Hexa-peri-Hexabenzocoronene Units: Y. Wada, K. Shinohara, and T. Ikai; Chem. Commun., 55, 11386-11389 (2019) DOI: 10.1039/C9CC06025A

61. One-Step Synthesis of One-Dimensional Supramolecular Assemblies Composed of Helical Macromolecular Building Blocks: Y. Wada, K. Shinohara, H. Asakawa, S. Matsui, T. Taima, and T. Ikai; J. Am. Chem. Soc., 141, 13995-14002 (2019) DOI: 10.1021/jacs.9b07417

60. Helicity Induction and Memory Effect in Poly(biphenylylacetylene)s Bearing Various Functional Groups and Their Use as Switchable Chiral Stationary Phases for HPLC: R. Ishidate, T. Sato, T. Ikai, S. Kanoh, E. Yashima, and K. Maeda; Polym. Chem., 10, 6260-6268 (2019) DOI: 10.1039/C9PY01425J
Selected as Inside Front Cover

59. Triptycene-Based Ladder Polymers with One-Handed Helical Geometry: T. Ikai, T. Yoshida, K. Shinohara, T. Taniguchi, Y. Wada, and T.M. Swager; J. Am. Chem. Soc., 141, 4696-4703 (2019) DOI: 10.1021/jacs.8b13865

58. Synthesis of Helical π-Conjugated Polymers Bearing Pyridine N-Oxide Pendants and Asymmetric Allylation of Aldehydes in the Helical Cavity: T. Ikai and T. Yoshida; Org. Biomol. Chem., 17, 8537-8540 (2019) DOI: 10.1039/C9OB01828J

57. Synthesis of a One-Handed Helical Polythiophene: A New Approach Using an Axially Chiral Bithiophene with a Fixed Syn-Conformation: T. Ikai, K. Takayama, Y. Wada, S. Minami, C. Apiboon, and K. Shinohara; Chem. Sci., 10, 4890-4895 (2019) DOI: 10.1039/C9SC00342H

56. Helicity Induction and Its Static Memory of Poly(biphenylylacetylene)s Bearing Pyridine N-Oxide Groups and Their Use as Asymmetric Organocatalysts: M. Ando, R. Ishidate, T. Ikai, K. Maeda, and E. Yashima; J. Polym. Sci., Part A: Polym. Chem., 57, 2481-2490 (2019) DOI: 10.1002/pola.29501

55. Dithiocarbamate-Modified Cellulose Resins: A Novel Adsorbent for Selective Removal of Arsenite from Aqueous Media: K. Nakakubo, H. Hasegawa, M. Ito, K. Yamazaki, M. Miyaguchi, F.B. Biswas, T. Ikai, and K. Maeda; J. Hazard. Mater., 380, 120816 (2019) DOI: 10.1016/j.jhazmat.2019.120816

54. Direct Detection of Minute- and Crypto-chirality of Tertiary and Quaternary Hydrocarbons and Isotopically Chiral Compounds by a Helical Polyacetylene through Chiral Amplification and Memory: K. Maeda, D. Hirose, N. Okoshi, K. Shimomura, Y. Wada, T. Ikai, S. Kanoh, and E. Yashima; J. Am. Chem. Soc., 140, 3270-3276 (2018) DOI: 10.1021/jacs.7b10981
Selected as Front Cover and highlighted in JACS Spotlights.

53. Circularly Polarized Luminescent Triptycene-Based Polymers: T. Ikai, T. Yoshida, S. Awata, Y. Wada, K. Maeda, M. Mizuno, and T.M. Swager; ACS Macro Lett., 7, 364-369 (2018) DOI: 10.1021/acsmacrolett.8b00106

52. Chiral Amplification in π-Conjugated Helical Polymers with Circularly Polarized Luminescence: T. Ikai, S. Shimizu, S. Awata, and K. Shinohara; Macromolecules, 51, 2328－2334 (2018) DOI: 10.1021/acs.macromol.8b00229

51. Optically Active Distorted Cyclic Triptycenes: Chiral Stationary Phases for HPLC: T. Ikai, N. Nagata, S. Awata, Y. Wada, K. Maeda, M. Mizuno, and T.M. Swager; RSC Adv., 8, 20483-20487 (2018) DOI: 10.1039/C8RA04434A

50. Helicity Control of π-Conjugated Foldamers Containing D-Glucose-Based Single Enantiomeric Units as a Chiral Source: T. Ikai, S. Minami, S. Awata, S. Shimizu, T. Yoshida, M. Okubo, and K. Shinohara; Polym. Chem., 9, 5504-5510 (2018) DOI: 10.1039/C8PY01436A

49. Synthesis of a Helical π-Conjugated Polymer with Dynamic Hydrogen-Bonded Network in the Helical Cavity and Its Circularly Polarized Luminescence Property: T. Ikai, S. Awata, and K. Shinohara; Polym. Chem., 9, 1541-1546 (2018) DOI: 10.1039/C7PY01867C
Selected as Front Cover

48. Static Memory of Enantiomeric Helices Induced in a Poly(biphenylylacetylene) by a Single Enantiomer Assisted by Temperature- and Solvent-Driven Helix Inversion: K. Maeda, K. Shimomura, T. Ikai, S. Kanoh, and E. Yashima; Macromolecules, 50, 7801-7806 (2017) DOI: 10.1021/acs.macromol.7b01955

47. Chromatographic Enantioseparation by Poly(biphenylylacetylene) Derivatives with Memory of Both Axial Chirality and Macromolecular Helicity: R. Ishidate, T. Ikai, S. Kanoh, E. Yashima, and K. Maeda; Chirality, 29, 120-129 (2017) DOI: 10.1002/chir.22687
Selected as Front Cover

46. Chiral Triptycene-Pyrene π-Conjugated Chromophores with Circularly Polarized Luminescence: T. Ikai, Y. Wada, S. Awata, C. Yun, K. Maeda, M. Mizuno, and T.M. Swager; Org. Biomol. Chem., 15, 8440-8447 (2017) DOI: 10.1039/C7OB02046E

45. A Cellulose-Based Chiral Fluorescent Sensor for Aromatic Nitro Compounds with Central, Axial and Planar Chirality: T. Ikai, D. Suzuki, K. Shinohara, K. Maeda, and S. Kanoh; Polym. Chem., 8, 2257-2265 (2017) DOI: 10.1039/C7PY00285H

44. Helical Folding of π-Conjugated Polymers Bearing Glucose-Linked Biphenyl Units in the Main Chain: Application to Circularly Polarized Luminescence Materials: T. Ikai, S. Shimizu, T. Kudo, K. Maeda, and S. Kanoh; Bull. Chem. Soc. Jpn., 90, 910-918 (2017) DOI: 10.1246/bcsj.20170122

43. Cellulose Derivatives Bearing Pyrene-Based π-Conjugated Pendants with Circularly Polarized Luminescence in Molecularly Dispersed State: T. Ikai, Y. Kojima, K. Shinohara, K. Maeda, and S. Kanoh; Polymer, 117, 220-224 (2017) DOI: 10.1016/j.polymer.2017.04.032

42. Chiral Stationary Phases Consisting of π-Conjugated Polymers Bearing Glucose-Linked Biphenyl Units: Reversible Switching of Resolution Abilities Based on a Coil-to-Helix Transition: T. Ikai, S. Awata, T. Kudo, R. Ishidate, K. Maeda, and S. Kanoh; Polym. Chem., 8, 4190-4198 (2017) DOI: 10.1039/C7PY00804J
Selected as Back Cover

41. A mechanistic Insight into the Organocatalytic Properties of Imidazolium-Based Ionic Liquids and a Positive Co-solvent Effect on Cellulose Modification Reactions in an Ionic Liquid: R. Kakuchi, R. Ito, S. Nomura, H. Abroshan, K. Ninomiya, T. Ikai, K. Maeda, H.J. Kim, and K. Takahashi; RSC Adv., 7, 9423-9430 (2017) DOI: 10.1039/C6RA28659C

40. Synthesis of Thieno[3,4-b]thiophene-Based Donor Molecules with Phenyl Ester Pendants for Organic Solar Cells: Control of Photovoltaic Properties via Single Substituent Replacement: Y. Wada, Y. Asada, T. Ikai, K. Maeda, T. Kuwabara, K. Takahashi, and S. Kanoh; ChemistrySelect, 1, 703-709 (2016) DOI: 10.1002/slct.201600205

39. Chiral Recognition Ability of an Optically Active Poly(diphenylacetylene) as a Chiral Stationary Phase for HPLC: K. Maeda, M. Maruta, K. Shimomura, T. Ikai, and S. Kanoh; Chem. Lett., 45, 1063-1065 (2016) DOI: 10.1246/cl.160542

38. Synthesis of Optically Active Poly(diphenylacetylene)s Using Polymer Reactions and an Evaluation of Their Chiral Recognition Abilities as Chiral Stationary Phases for HPLC: K. Maeda, M. Maruta, Y. Sakai, T. Ikai, and S. Kanoh; Molecules, 21, 1487-1500 (2016) DOI: 10.3390/molecules21111487

37. Development of Amylose- and β-Cyclodextrin-Based Chiral Fluorescent Sensors Bearing Terthienyl Pendants: T. Ikai, C. Yun, Y. Kojima, D. Suzuki, K. Maeda, and S. Kanoh; Molecules, 21, 1518-1529 (2016) DOI: 10.3390/molecules21111518

36. Impact of a Minority Enantiomer on the Polymerization of Alanine-Based Isocyanides with an Oligothiophene Pendant: T. Ikai, Y. Wada, Y. Takagi, and K. Shinohara; Polym. Chem., 7, 7057-7067 (2016) DOI: 10.1039/C6PY01351A
Selected as Front Cover

35. Chiral Fluorescent Sensors Based on Cellulose Derivatives Bearing Terthienyl Pendants: T. Ikai, D. Suzuki, Y. Kojima, C. Yun, K. Maeda, and S. Kanoh; Polym. Chem., 7, 4793-4801 (2016) DOI: 10.1039/C6PY00967K

34. Synthesis and Chiroptical Properties of a π-Conjugated Polymer Containing Glucose-Linked Biphenyl Units in the Main Chain Capable of Folding into a Helical Conformation: T. Ikai, S. Shimizu, S. Awata, T. Kudo, T. Yamada, K. Maeda, and S. Kanoh; Polym. Chem., 7, 7522-7529 (2016) DOI: 10.1039/C6PY01759B

33. Achieving High ON/OFF Ratio and Good Stability in Organic Nonvolatile Resistive Memory Devices with Polyisocyanide Bearing Oligothiophene: Y. Sakuragawa, Y. Takagi, T. Ikai, K. Maeda, T.T. Dao, H. Sakai, and H. Murata; Jpn. J. Appl. Phys., 55, 03DC10 (2016) DOI: 10.7567/JJAP.55.03DC10

32. Influence of 4-Fluorophenyl Pendants in Thieno[3,4-b]thiophene-benzo[1,2-b:4,5-b’]dithiophene-Based Polymers on the Performance of Photovoltaics: T. Yamamoto, T. Ikai, S. Katori, T. Kuwabara, K. Maeda, T. Koganezawa, K. Takahashi, and S. Kanoh; J. Polym. Sci., Part A: Polym. Chem., 53, 1586-1593 (2015) DOI: 10.1002/pola.27589

31. Macromolecular Helicity Induction and Memory in a Poly(biphenylylacetylene) Bearing an Ester Group and Its Application to a Chiral Stationary Phase for High-performance Liquid Chromatography: R. Ishidate, K. Shimomura, T. Ikai, S. Kanoh, and K. Maeda; Chem. Lett., 44, 946-948 (2015) DOI: 10.1246/cl.150299

30. Synthesis of Polyisocyanides Bearing Oligothiophene Pendants: Higher-Order Structural Control through Pendant Framework Design: T. Ikai, Y. Takagi, K. Shinohara, K. Maeda, and S. Kanoh; Polym. J., 47, 625-630 (2015) DOI: 10.1038/pj.2015.42

29. Thieno[3,4-b]thiophene-Benzo[1,2-b:4,5-b’]dithiophene-Based Polymers Bearing Optically Pure 2-Ethylhexyl Pendants: Synthesis and Application in Polymer Solar Cells: T. Ikai, R. Kojima, S. Katori, T. Yamamoto, T. Kuwabara, K. Maeda, K. Takahashi, and S. Kanoh; Polymer, 56, 171-177 (2015) DOI: 10.1016/j.polymer.2014.11.033

28. Efficient and Rapid Direct Transesterification Reactions of Cellulose with Isopropenyl Acetate in Ionic Liquids: R. Kakuchi, M. Yamaguchi, T. Endo, Y. Shibata, K. Ninomiya, T. Ikai, K. Maeda, and K. Takahashi; RSC Adv., 5, 72071-72074 (2015) DOI: 10.1039/C5RA14408F

27. Switchable Enantioseparation Based on Macromolecular Memory of a Helical Polyacetylene in the Solid State: K. Shimomura, T. Ikai, S. Kanoh, E. Yashima, and K. Maeda; Nature Chem., 6, 429-434 (2014) DOI: 10.1038/nchem.1916
Listed as "Highly Cited Papers" in Web of Science

26. Chiral Amplification in Polymer Brushes Consisting of Dynamic Helical Polymer Chains through the Long-Range Communication of Stereochemical Information: K. Maeda, S. Wakasone, K. Shimomura, T. Ikai, and S. Kanoh; Macromolecules, 47, 6540-6546 (2014) DOI: 10.1021/ma501612e

25. Fine Tuning of Frontier Orbital Energy Levels in Dithieno[3,2-b:2',3'-d]silole-Based Copolymers Based on the Substituent Effect of Phenyl Pendants: T. Ikai, T. Kudo, M. Nagaki, T. Yamamoto, K. Maeda, and S. Kanoh; Polymer, 55, 2139-2145 (2014) DOI: 10.1016/j.polymer.2014.03.021

24. Synthesis of Polysaccharide Derivatives Bearing Bromobenzoate Pendants for Use as Chiral Auxiliaries: T. Ikai, K. Kimura, K. Maeda, and S. Kanoh; React. Funct. Polym., 82, 52-57 (2014) DOI: 10.1016/j.reactfunctpolym.2014.06.001

23. Helical Polymer Brushes with a Preferred-Handed Helix-Sense Triggered by a Terminal Optically Active Group in the Pendant: K. Maeda, S. Wakasone, K. Shimomura, T. Ikai, and S. Kanoh; Chem. Commun., 48, 3342-3344 (2012) DOI: 10.1039/c2cc00024e

22. Synthesis of Seleno[3,4-c]pyrrole-4,6-Dione-Based Polymers for Polymer Solar Cells: T. Ikai, A.K.M.F. Azam, M. Kuzuba, T. Kuwabara, K. Maeda, K. Takahashi, and S. Kanoh; Synth. Met, 162, 1707-1712 (2012) DOI: 10.1016/j.synthmet.2012.07.003

21. Synthesis and Characterization of Thieno[3,4-b]thiophene-Based Copolymers Bearing 4-Substituted Phenyl Ester Pendants: Facile Fine-Tuning of HOMO Energy Levels: T. Yamamoto, T. Ikai, M. Kuzuba, T. Kuwabara, K. Maeda, K. Takahashi, and S. Kanoh; Macromolecules, 44, 6659-6662 (2011) DOI: 10.1021/ma201501g

20. Synthesis and Chiral Recognition Ability of A Poly(phenylenevinylene)-Encapsulated Amylose Derivative: K. Tamura, N. S. M. Sam, T. Ikai, Y. Okamoto, and E. Yashima; Bull. Chem. Soc. Jpn., 84, 741-747 (2011) DOI: 10.1246/bcsj.20110074
Highlighted as Selected Paper

19. Chiral Recognition Ability of Cellulose Derivatives Bearing Pyridyl and Bipyridyl Residues as Chiral Stationary Phases for High-Performance Liquid Chromatography: Y. Katoh, Y. Tsujimoto, C. Yamamoto, T. Ikai, M. Kamigaito, and Y. Okamoto; Polym. J., 43, 84-90 (2011) DOI: 10.1038/pj.2010.108

18. Synthesis of Polysaccharide Derivatives Bearing Pyridine N-Oxide Groups and Their Use as Asymmetric Organocatalysts: T. Ikai, M. Moro, K. Maeda, and S. Kanoh; React. Funct. Polym., 71, 1055-1058 (2011) DOI: 10.1016/j.reactfunctpolym.2011.07.010

17. Immobilization and Chiral Recognition of 3,5-Dimethylphenylcarbamates of Cellulose and Amylose Bearing 4-(Trimethoxysilyl)phenylcarbamate Groups: S. Tang, T. Ikai, M. Tsuji, and Y. Okamoto; Chirality, 22, 165-172 (2010) DOI: 10.1002/chir.20722

16. Immobilization of 3,5-Dimethylphenyl-Carbamates of Cellulose and Amylose onto Silica Gel Using (3-Glycidoxypropyl)triethoxysilane as Linker: S. Tang, T. Ikai, M. Tsuji, and Y. Okamoto; J. Sep. Sci., 33, 1255-1263 (2010) DOI: 10.1002/jssc.200900711

15. Enantioseparation Using Amylose Esters as Chiral Stationary Phases for High-Performance Liquid Chromatography: Y. Sugiura, C. Yamamoto, T. Ikai, M. Kamigaito, and Y. Okamoto; Polym. J., 42, 31-36 (2010) DOI: 10.1038/pj.2009.300

14. Synthesis and Immobilization of Amylose Derivatives Bearing a 4-tert-Butylbenzoate Group at the 2-Position and 3,5-Dichlorophenylcarbamate/3-(Triethoxysilyl)propylcarbamate Groups at 3-and 6-Positions as Chiral Packing Material for HPLC: J. Shen, T. Ikai, X. Shen, and Y. Okamoto; Chem. Lett., 39, 442-444 (2010) DOI: 10.1246/cl.2010.442

13. Synthesis and Chiral Recognition of Novel Amylose Derivatives Containing Regioselectively Benzoate and Phenylcarbamate Groups: J. Shen, T. Ikai, and Y. Okamoto; J. Chromatogr. A, 1217, 1041-1047 (2010) DOI: 10.1016/j.chroma.2009.07.027

12. Preparation and HPLC Application of Chiral Stationary Phase from 4-tert-Butylphenylcarbamates of Cellulose and Amylose Immobilized onto Silica Gel: J.-q. Li, T. Ikai, and Y. Okamoto; J. Sep. Sci., 32, 2885-2891 (2009) DOI: 10.1002/jssc.200900206

11. A Maltooctaose Derivative (“Acyclodextrin”) as a Chiral Stationary Phase for Enantioselective Gas Chromatography: G. Sicoli, I. Tomoyuki, L. Jicsinszky, and V. Schurig; Eur. J. Org. Chem., 4241-4244 (2008) DOI: 10.1002/ejoc.200800508

10. Organic-Inorganic Hybrid Materials for Efficient Enantioseparation Using Cellulose 3,5-Dimethylphenylcarbamate and Tetraethyl Orthosilicate: T. Ikai, C. Yamamoto, M. Kamigaito, and Y. Okamoto; Chem. - Asian. J., 3, 1494-1499 (2008) DOI: 10.1002/asia.200800022

9. Calix[4]arene-Based Bis[2]catenanes: Synthesis and Chiral Resolution: O. Molokanova, A. Bogdan, M.O. Vysotsky, M. Bolte, T. Ikai, Y. Okamoto, and V. Boehmer; Chem. - Eur. J., 13, 6157-6170 (2007) DOI: 10.1002/chem.200601814

8. Preparation and Chiral Recognition Ability of Crosslinked Beads of Polysaccharide Derivatives: T. Ikai, C. Yamamoto, M. Kamigaito, and Y. Okamoto; J. Sep. Sci, 30, 971-978 (2007) DOI: 10.1002/jssc.200600438

7. Immobilization of Polysaccharide Derivatives onto Silica Gel. Facile Synthesis of Chiral Packing Materials by Means of Intermolecular Polycondensation of Triethoxysilyl Groups: T. Ikai, C. Yamamoto, M. Kamigaito, and Y. Okamoto; J. Chromatogr. A, 1157, 151-158 (2007) DOI: 10.1016/j.chroma.2007.04.054

6. Efficient Immobilization of Cellulose Phenylcarbamate Bearing Alkoxysilyl Group onto Silica Gel by Intermolecular Polycondensation and Its Chiral Recognition: T. Ikai, C. Yamamoto, M. Kamigaito, and Y. Okamoto; Chem. Lett., 35, 1250-1251 (2006) DOI: 10.1246/cl.2006.1250

5. High-Performance Liquid Chromatographic Enantioseparations on Capillary Columns Containing Crosslinked Polysaccharide Phenylcarbamate Derivatives Attached to Monolithic Silica: B. Chankvetadze, T. Kubota, T. Ikai, C. Yamamoto, M. Kamigaito, N. Tanaka, K. Nakanishi, and Y. Okamoto; J. Sep. Sci., 29, 1988-1995 (2006) DOI: 10.1002/jssc.200500388

4. Enantioseparation by HPLC Using Phenylcarbonate, Benzoylformate, p-Toluenesulfonylcarbamate, and Benzoylcarbamates of Cellulose and Amylose as Chiral Stationary Phases: T. Ikai, C. Yamamoto, M. Kamigaito, and Y. Okamoto; Chirality, 17, 299-304 (2005) DOI: 10.1002/chir.20168

3. Cellulose Derivative-Based Beads as Chiral Stationary Phase for HPLC: T. Ikai, R. Muraki, C. Yamamoto, M. Kamigaito, and Y. Okamoto; Chem. Lett., 33, 1188-1189 (2004) DOI: 10.1246/cl.2004.1188

2. High-Performance Liquid Chromatographic Enantio Separations on Monolithic Silica Columns Containing a Covalently Attached 3,5-Dimethylphenylcarbamate Derivative of Cellulose: B. Chankvetadze, T. Ikai, C. Yamamoto, and Y. Okamoto; J. Chromatogr. A, 1042, 55-60 (2004) DOI: 10.1016/j.chroma.2004.05.011

1. Rational Synthesis of Multicyclic Bis[2]catenanes: A. Bogdan, M.O. Vysotsky, T. Ikai, Y. Okamoto, and V. Bohmer; Chem. - Eur. J., 10, 3324-3330 (2004) DOI: 10.1002/chem.200400195