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A01 Hiroaki Imoto

Hiroaki Imoto

Participating A01

Affiliation

Department of Chemistry and Materials Technology, Kyoto Institute of Technology

Position

Associate Professor

Contact

himoto@kit.ac.jp

HP

http://www.cis.kit.ac.jp/~kenaka/index.html

Research Project

Innovative asymmetric chemistry of organoarsenic compounds toward higher-ordered structures and highly-functionalized materials

Abstract

In this project, we are challenging for the development of practical synthetic methods for asymmetric organoarsenic compounds, which remain to be examined. Moreover, the higher-ordered structures and high functions will be investigated in detail. An arsenic atom has advantages in organic chemistry over other pnictogens because of its high steric and chemical stability. Additionally, the design of asymmetrical coordination spheres is simplified by utilizing arsenic-stereogenic compounds, in which the stereo-center itself has coordination ability. The precisely designed higher-ordered structure and versatile functions of transition metals will open new avenue toward further advancement of the science of coordination asymmetry.

Research Areas

Organic Synthesis, Polymer Chemistry, Material Science

Keywords

Organoarsenic Compounds, Chiral Ligand, Luminescent Material

2021

[41] Dibenzoarsacrowns: an experimental and computational study on the coordination behaviors,
Akifumi Sumida; Ryosuke Kobayashi; Takashi Yumura; Hiroaki Imoto; Kensuke Naka, Chem. Commun., 57, 2013 - 2016, 2021
DOI: 10.1039/D0CC07191A.
[40] 2,3‐Diarylbenzo[b]arsole: structural modification and polymerization for tuning of photophysical properties,
Kosuke Ishijima; Susumu Tanaka; Hiroaki Imoto; Kensuke Naka, , , 2021
DOI: 10.1002/chem.202005001.
[39] Superior light-resistant Dithieno[3,2-b:2′,3′-d]arsole-based polymers exhibiting ultrastable amplified spontaneous emission,
Chieko Yamazawa; Yoshinori Hirano; Hiroaki Imoto; Naoto Tsutsumi; Kensuke Naka, Chem. Commun., 57, 1595 - 1598, 2021
DOI: 10.1039/D0CC07521C.
[38] Arsenic‐bridged silafluorene and germafluorene as a novel class of mixed‐heteroatom‐bridged heterofluorenes,
Hiroshi Sasaki; Ippei Akioka; Hiroaki Imoto; Kensuke Naka, European Journal of Organic Chemistry, , 2021
DOI: 10.1002/ejoc.202001644.
[37] Dinuclear rhombic copper(I) iodide complexes with rigid bidentate arsenic ligands,
Ryosuke Kobayashi; Hyota Kihara; Takahiro Kusukawa; Hiroaki Imoto; Kensuke Naka, Chem. Lett., 50, 382 - 385, 2021
DOI: 10.1246/cl.200763.

2020

[36] Soluble and film-formable homopolymer tethering side-opened cage silsesquioxane pendants,
Yuri Sato; Hiroaki Imoto; Kensuke Naka, Journal of Polymer Science, 58, 10, 1456 - 1462, 2020
DOI: 10.1002/pol.20200161.
[35] Corner‐ and Side‐Opened Cage Silsesquioxanes: Structural Effects on the Materials Properties,
Hiroaki Imoto; Yukiho Ueda; Yuri Sato; Masashi Nakamura; Koji Mitamura; Seiji Watase; Kensuke Naka, Eur. J. Inog. Chem., 2020, 9, 737 - 742, 2020
DOI: 10.1002/ejic.201901182.
[34] Dithieno[3,4‐b:3’,4’‐d]arsole: a Novel Class of Hetero[5]radialenes,
Aya Urushizaki; Takashi Yumura; Yuichi Kitagawa; Yasuchika Hasegawa; Hiroaki Imoto; Kensuke Naka, European Journal of Organic Chemistry, 2020, 26, 3965 - 3970, 2020
DOI: 10.1002/ejoc.202000442.
[33] Systematic study on catalytic arsa-Wittig reaction,
Ryoto Inaba; Ikuo Kawashima; Toshiki Fujii; Takashi Yumura; Hiroaki Imoto; Kensuke Naka, Chem. Eur. J., 26, 59, 13400 - 13407, 2020
DOI: 10.1002/chem.202002792.
[32] Fundamental Study on Arsenic(III) Halides (AsX3: X = Br, I) toward Construction of C3-Symmetrical Monodentate Arsenic Ligands,
Susumu Tanaka; Masafumi Konishi; Hiroaki Imoto; Yuma Nakamura; Masatoshi Ishida; Hiroyuki Furuta; Kensuke Naka, Inorg. Chem., 59, 14, 9587 - 9593, 2020
DOI: 10.1021/acs.inorgchem.0c00598.
[31] Dipyridinoarsole: A new class of stable and modifiable heteroatom-bridged bipyridines,
Toshiki Fujii; Susumu Tanaka; Shotaro Hayshi; Hiroaki Imoto; Kensuke Naka, Chem. Commun., 56, 45, 6035 - 6038, 2020
DOI: 10.1039/D0CC02389B.

2019

[30] Polymers and Cyclic Compounds Based on a Side-Opening Type Cage-Silsesquioxane,
Hiroaki Imoto; Yuri Sato; Kensuke Naka, Journal of Polymer Science Part A: Polymer Chemistry, 57, 22, 2243 - 2250, 2019
DOI: 10.1002/pola.29513.
[29] Synthesis of metallosupramolecular polymers incorporating cage silsesquioxanes in the main chains,
Mari Hashimoto; Shunichi Fujii; Hiroaki Imoto; Kensuke Naka, Journal of Polymer Science Part A: Polymer Chemistry, 57, 22, 2260 - 2266, 2019
DOI: 10.1002/pola.29521.
[28] Construction of Bidentate Arsenic Ligand Library Starting from a Cyclooligoarsine,
Hiroaki Imoto; Masafumi Konishi; Shintaro Nishiyama; Hiroshi Sasaki; Susumu Tanaka; Takashi Yumura; Kensuke Naka, Chem. Lett., 48, 11, 1312 - 1315, 2019
DOI: 10.1246/cl.190540.
[27] Soluble Network Polymers Based on Trifunctional Open-Cage Silsesquioxanes,
Hiroaki Imoto; Ayano Ishida; Mari Hashimoto; Yoko Mizoue; Shin-ichi Yusa; Kensuke Naka, Chem. Lett., 48, 10, 1266 - 1269, 2019
DOI: 10.1246/cl.190536.
[26] Syntheses, Structures and Optical Properties of Diaminomaleimide Dimers and Polymer,
Hiroaki Imoto; Ryosuke Fujii; Kensuke Naka, European Journal of Organic Chemistry, 2019, 20, 3086 - 3092, 2019
DOI: 10.1002/ejoc.201900195.
[25] Dibenzoarsepins: Planarization of 8π‐Electron System in the Lowest Singlet Excited State,
Ikuo Kawashima; Hiroaki Imoto; Masatoshi Ishida; Hiroyuki Furuta; Shunsuke Yamamoto; Masaya Mitsuishi; Susumu Tanaka; Toshiki Fujii; Kensuke Naka, Angew. Chem. Int. Ed., 58, 34, 11686 - 11690, 2019
DOI: 10.1002/anie.201904882.
[24] Fluorinated Porous Molecular Crystals: Vapor-Triggered On-Off Switching of Luminescence and Porosit,
Hiroshi Sasaki; Hiroaki Imoto; Takashi Kitao; Takashi Uemura; Takashi Yumura; Kensuke Naka, Chem. Commun., 55, 46, 6487 - 6490, 2019
DOI: 10.1039/C9CC02309G.
[23] Palladium-Catalyzed Arylation of Open-Cage Silsesquioxanes toward Thermally Stable and Highly Dispersible Nanofillers,
Satoshi Wada; Hiroaki Imoto; Kensuke Naka, Bull. Chem. Soc. Jpn., 92, 5, 989 - 994, 2019
DOI: 10.1246/bcsj.2019-0027.
[22] One-pot strategy for synthesis of open-cage silsesquioxane monomers,
Ryoichi Katoh; Hiroaki Imoto; Kensuke Naka, Polymer Chemistry, 10, 18, 2223 - 2229, 2019
DOI: 10.1039/C9PY00036D.
[21] The Dawn of Functional Organoarsenic Chemistry,
Hiroaki Imoto; Kensuke Naka, Chem. Eur. J., 25, 8, 1883 - 1894, 2019
DOI: 10.1002/chem.201804114.
[20] Thermal Properties of Open-Cage Silsesquioxanes: The Effect of Substituents at the Corners and Opening Moieties,
Sota Yuasa; Yuri Sato; Hiroaki Imoto; Kensuke Naka, Bull. Chem. Soc. Jpn., 92, 1, 127 - 132, 2019
DOI: 10.1246/bcsj.20180257.

2018

[19] As-Heteropentacenes: An Experimental and Computational Study on a Novel Class of Heteroacenes,
Hiroaki Imoto; Toshiki Fujii; Susumu Tanaka; Shunsuke Yamamoto; Masaya Mitsuishi; Takashi Yumura; Kensuke Naka, Org. Lett., 20, 18, 5952 - 5955, 2018
DOI: 10.1021/acs.orglett.8b02660.
[18] Electropolymerization of Dithieno[3,2‐b:2′,3′‐d]arsole,
Hiroaki Imoto; Chieko Yamazawa; Shotaro Hayashi; Masami Aono; Kensuke Naka, ChemElectroChem, 5, 22, 3357 - 3360, 2018
DOI: 10.1002/celc.201801069.
[17] Open-cage silsesquioxane necklace polymers having closed-cage silsesquioxane pendants,
Hiroaki Imoto; Ryoichi Katoh; Kensuke Naka, Polymer Chemistry, 9, 30, 4108 - 4112, 2018
DOI: 10.1039/C8PY00758F.
[16] Effect of Mono-Substituents in Heptaisobutyl-Substituted Polyhedral Octasilsesquioxanes on Orientationally Disordered Phase Transition,
Satoshi Morimoto; Hiroaki Imoto; Kenji Kanaori; Kensuke Naka, Bull. Chem. Soc. Jpn., 91, 9, 1390 - 1396, 2018
DOI: 10.1246/bcsj.20180156.
[15] Synthesis and properties of hyperbranched polymers by polymerization of an AB3-type incompletely condensed cage silsesquioxane (IC-POSS) monomer,
Sota Yuasa; Hiroaki Imoto; Kensuke Naka, Polymer Journal, 50, 9, 879 - 887, 2018
DOI: 10.1038/s41428-018-0071-5.
[14] Syntheses of dithienoarsole–containing polymers via Suzuki-Miyaura and Sonogashira-Hagihara coupling reactions,
Hiroaki Imoto; Chieko Yamazawa; Kensuke Naka, Chem. Lett., 47, 7, 887 - 890, 2018
DOI: 10.1246/cl.180298.
[13] Development of macromolecules and supramolecules based on silicon and arsenic chemistries,
Hiroaki Imoto, Polymer Journal, 50, 9, 837 - 846, 2018
DOI: 10.1038/s41428-018-0068-0.
[12] Peraryl Arsoles: Practical Synthesis, Electronic Structures, and Solid-State Emission Behaviors,
Hiroaki Imoto; Aya Urushizaki; Ikuo Kawashima; Kensuke Naka, Chem. Eur. J., 24, 35, 8797 - 8803, 2018
DOI: 10.1002/chem.201801589.
[11] Beads-on-String-Shaped Poly(azomethine) Applicable for Solution Processing of Bilayer Devices Using a Same Solvent,
Shunichi Fujii; Saori Minami; Kenji Urayama; Yu Suenaga; Hiroyoshi Naito; Orito Miyashita; Hiroaki Imoto; Kensuke Naka, ACS Macro Letters, 7, 641 - 645, 2018
DOI: 10.1021/acsmacrolett.8b00271.
[10] Substituent-Dependent Stimuli Recognition of Luminescent Gold(I) Chloride Complexes Based on Diarsenic Ligands,
Hiroaki Imoto; Shintaro Nishiyama; Kensuke Naka, Bull. Chem. Soc. Jpn., 91, 3, 349 - 354, 2018
DOI: 10.1246/bcsj.20170330.
[9] Self-association behavior of amphiphilic molecules based on incompletely condensed cage silsesquioxanes and poly(ethylene glycol)s,
Hiroaki Imoto; Ryoichi Katoh; Tomoko Honda; Shin-ichi Yusa; Kensuke Naka, Polymer Journal, 50, 4, 337 - 345, 2018
DOI: 10.1038/s41428-017-0021-7.
[8] Fabrication of Composite Films with Poly(methyl methacrylate) and Incompletely Condensed Cage-Silsesquioxane Fillers,
Sota Yuasa; Yuri Sato; Hiroaki Imoto; Kensuke Naka, Journal of Applied Polymer Science, 135, 12, 46033, 2018
DOI: 10.1002/app.46033.
[7] 3,4-Diaminomaleimide Dyes: Simple Luminophores with Efficient Orange-Red Emission in the Solid State,
Hiroaki Imoto; Ryosuke Fujii; Kensuke Naka, Eur. J. Org. Chem., 6, 837 - 843, 2018
DOI: 10.1002/ejoc.201701479.

2017

[6] Arsenic Halogenation of 9-Arsafluorene and Utilization for As−C Bond Formation Reaction,
Susumu Tanaka; Hiroaki Imoto; Takashi Yumura; Kensuke Naka, Organometallics, 36, 9, 1684 - 1687, 2017
DOI: 10.1021/acs.organomet.7b00198.
[5] Platinum(II) Dihalide Complexes with 9-Arsafluorenes: Effects of Ligand Modification on the Phosphorescent Properties,
Hiroaki Imoto; Hiroshi Sasaki; Susumu Tanaka; Takashi Yumura; Kensuke Naka, Organometallics, 36, 14, 2605 - 2611, 2017
DOI: 10.1021/acs.organomet.7b00233.
[4] POSS Solid Solutions Exhibiting Orientationally Disordered Phase Transition,
Satoshi Morimoto; Hiroaki Imoto; Kensuke Naka, Chem. Commun., 53, 66, 9273 - 9276, 2017
DOI: 10.1039/C7CC04443G.
[3] Control of Aurophilic Interaction: Conformations and Electronic Structures of One-Dimensional Supramolecular Architectures,
Hiroaki Imoto; Shintaro Nishiyama; Takashi Yumura; Seiji Watase; Kimihiro Matsukawa; Kensuke Naka, Dalton Trans., 46, 25, 8077 - 8082, 2017
DOI: 10.1039/C7DT01383C.
[2] Multi-Mode Emission Color Tuning of Dithieno[3,2-b:2',3'-d]arsoles,
Hiroaki Imoto; Ikuo Kawashima; Chieko Yamazawa; Susumu Tanaka; Kensuke Naka, J. Mater. Chem. C, 5, 27, 6697 - 6703, 2017
DOI: 10.1039/C7TC01989K.
[1] Rh-Catalyzed Direct Arylation of a Polyhedral Oligomeric Silsesquioxane,
Hiroaki Imoto; Satoshi Wada; Kensuke Naka, Dalton Trans., 46, 19, 6168 - 6171, 2017
DOI: 10.1039/C7DT01106G.