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Tajikawa R, Tokuami I, Nagao M, Okada A, Imoto H, Naka K. Phenyl-Substituted Cage Silsesquioxane-Based Star-Shaped Giant Molecular Clusters: Synthesis, Properties, and Surface Segregation Behavior. Langmuir 2024. [PMID: 38758730 DOI: 10.1021/acs.langmuir.4c01349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2024]
Abstract
The crystallinity, solubility, and physical properties of polyhedral oligomeric silsesquioxane (POSS) compounds are highly dependent on their organic substituents. We previously synthesized a series of isobutyl-substituted star-shaped POSS derivatives with aliphatic chain linkers of different length. In this study, we prepared C3- and C6-linked phenyl-substituted star-shaped POSS derivatives (3Ph-C3 and 3Ph-C6) by the hydrosilylation of heptaphenylallyl- and hexenyl-POSS (1a and 1b) and octadimethylsiloxy-Q8-silsesquioxane (Q8M8H) (2), respectively, and their properties were compared with those of the corresponding isobutyl-substituted derivatives (5iBu-C3 and 5iBu-C6). Although 3Ph-C6 was only soluble in chloroform and insoluble in tetrahydrofuran (THF) and toluene, 3Ph-C3 was soluble even in THF and toluene, suggesting that the shorter linkers of the derivative afford a wider range of solvents for dissolution. Differential scanning calorimetry analysis showed that 3Ph-C3 exhibited a baseline shift at 190 °C and an endothermic peak at 316 °C. However, no clear baseline shift was observed for 3Ph-C6. Thermogravimetric analysis showed that the shorter linker in the phenyl-substituted star-shaped POSS derivative significantly increased the decomposition temperature compared with the longer linker. The annealed cast film of 3Ph-C3 at 340 °C above its melting temperature formed a transparent film even after cooling to room temperature. However, an opaque whitish film was formed in the case of 3Ph-C6. Poly(methyl methacrylate) (PMMA) films containing 2 wt % 3Ph-C3 and 3Ph-C6 were prepared by casting their chloroform solutions onto glass substrates overnight at room temperature. The static water contact angle measurements and XPS analysis for the castings film containing 3Ph-C3 and 3Ph-C6 suggested that degree of the segregation amount of 3Ph-C3 was larger than that of 3Ph-C6. The shorter linker length in the phenyl-substituted star-shaped POSS derivative, 3Ph-C3, with its greater predicted solubility in PMMA, exhibited entropy-driven surface segregation.
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Affiliation(s)
- Rina Tajikawa
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Ichiyo Tokuami
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Mayu Nagao
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Arifumi Okada
- Faculty of Materials Science and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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2
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Shimoji H, Aoyama Y, Inage K, Nakamura M, Yanagihara T, Yuhara K, Kitagawa Y, Hasegawa Y, Ito S, Tanaka K, Imoto H, Naka K. Highly Efficient and Thermally Durable Luminescence of 1D Eu 3+ Coordination Polymers with Arsenic Bridging Ligands. Chemistry 2024:e202400615. [PMID: 38591237 DOI: 10.1002/chem.202400615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 04/08/2024] [Accepted: 04/08/2024] [Indexed: 04/10/2024]
Abstract
In this work, bisarsine oxides were evaluated as novel bridging ligands, aiming to develop practical and efficient luminescent lanthanide coordination polymers. We have synthesized one-dimensional (1D) Eu3+ coordination polymers that incorporate bisarsine oxide bridging ligands and hexafluoroacetylacetonate anions. These polymers exhibited a denser packing of chains compared to analogous polymers bridged with bisphosphine oxides. The coordination polymers demonstrated exceptional thermal stability and substantial emission quantum yields. Additionally, the bisarsine oxides induced a pronounced polarization effect, facilitating a sensitive electric dipole transition that yields considerably narrow band red emission. Remarkably, the Eu3+ coordination polymers with bisarsine oxides maintained intense emission even at 550 K. A distinctive feature of these polymers is their heating-induced emission enhancement observed when the temperature was increased from 300 K to 400 K.
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Affiliation(s)
- Haruki Shimoji
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
| | - Yuto Aoyama
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Kota Inage
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan
| | - Masashi Nakamura
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Takumi Yanagihara
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Kazuhiro Yuhara
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Yuichi Kitagawa
- Faculty of Engineering, Hokkaido University, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido, 001-0021, Japan
| | - Yasuchika Hasegawa
- Faculty of Engineering, Hokkaido University, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido, 001-0021, Japan
| | - Shunichiro Ito
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Kazuo Tanaka
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
- FOREST, JST, Honcho 4-1-8, Kawaguchi, Saitama, 332-0012, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
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Kikuchi K, Sei H, Okubo K, Tohnai N, Oka K, Dekura S, Kikuchi T, Imoto H, Naka K. Breathing Metal-Organic Frameworks Supported by an Arsenic-Bridged 4,4'-Bipyridine Ligand. Inorg Chem 2024; 63:4337-4343. [PMID: 38365195 DOI: 10.1021/acs.inorgchem.3c04570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2024]
Abstract
Bent ligands bridged by heteroatoms have drawn significant interest as supramolecular coordination architectures. Traditionally, divalent group 16 elements are preferred over trivalent group 15 elements because of the anticipated steric hindrance. In this study, we explore metal-organic frameworks (MOFs) based on dipyridinoarsoles (DPAs), 4,4'-bipyridines bridged with an arsenic atom. An MOF with methyl-substituted DPA collapsed upon solvent removal, whereas that with phenyl-substituted DPA demonstrated breathing behavior due to guest molecule adsorption/desorption. In contrast, MOFs using the phosphorus analogue dipyridinophosphole exhibit inferior adsorption and lack breathing behavior. This is the first study to investigate the interplay among substituents, bridging elements, and dynamic behavior in MOFs using bent group 15 ligands.
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Affiliation(s)
- Kazuma Kikuchi
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroi Sei
- Center for Future Innovation (Cfi) and Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Kohei Okubo
- Center for Future Innovation (Cfi) and Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Norimitsu Tohnai
- Center for Future Innovation (Cfi) and Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Kouki Oka
- Center for Future Innovation (Cfi) and Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Shun Dekura
- The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kash iwanoha, Kashiwa, Chiba 277-8581, Japan
| | - Takashi Kikuchi
- Rigaku Corporation, 3-9-12 Matsubara-cho, Akishima-shi, Tokyo 196-8666, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- FOREST, JST, Honcho 4-1-8, Kawaguchi, Saitama 332-0012, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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Sumida A, Onishi T, Imoto H, Naka K. Synthesis, structures, and photophysical properties of π-extended arsaborins. Dalton Trans 2024; 53:1706-1713. [PMID: 38168688 DOI: 10.1039/d3dt03798c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
In this study, various (hetero)arene-fused arsaborins were synthesized. All the synthesized arsaborins were stable under ambient conditions and allowed for the chemical modification of the lone pair of the arsenic atom. Experimental and computational studies revealed that these compounds possessed planar structures and weak anti-aromatic properties. Fluorescence with large Stokes shifts was observed due to drastic structural relaxation at 298 K, whereas intense phosphorescence due to the heavy-atom effect of arsenic was observed at 77 K. Furthermore, a thiophene-fused derivative demonstrated a temperature-dependent emission color change in the solid state, attributable to the gradual alteration in the ratio of monomer fluorescence, excimer fluorescence, and phosphorescence.
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Affiliation(s)
- Akifumi Sumida
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Tomoharu Onishi
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
- FOREST, JST, Honcho 4-1-8, Kawaguchi, Saitama 332-0012, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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Kikuchi K, Imoto H, Naka K. Robust and highly emissive copper(I) halide 1D-coordination polymers with triphenylarsine and a series of bridging N-heteroaromatic co-ligands. Dalton Trans 2023; 52:11168-11175. [PMID: 37505189 DOI: 10.1039/d3dt00784g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Various 1D-coordination polymers with dinuclear rhombic {Cu2X2} cores (X = Br, I) were synthesized using a spontaneous evaporation method employing triphenylarsine (AsPh3) and six types of bidentate N-heteroaromatic co-ligands. The coordination polymers exhibited intense emission even at 298 K (quantum yield: up to 0.60), and their emission color was dependent on the N-heteroaromatic co-ligand. The emission efficiencies of these coordination polymers were higher than those of the discrete complexes with AsPh3 and monodentate N-heteroaromatic co-ligands reported in our previous work. In addition, the luminescence of these coordination polymers was more resistant to mechanical stimuli than that of the discrete ones.
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Affiliation(s)
- Kazuma Kikuchi
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Gashokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Gashokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Gashokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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Matsumura Y, Tanudjaja A, Fukushima M, Higuchi M, Ogino S, Ishidoshiro M, Irie Y, Imoto H, Naka K, Hifumi R, Inagi S, Tomita I. Parallel synthesis of donor-acceptor π-conjugated polymers by post-element transformation of organotitanium polymer. Des Monomers Polym 2023; 26:190-197. [PMID: 37426066 PMCID: PMC10327520 DOI: 10.1080/15685551.2023.2233228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 07/01/2023] [Indexed: 07/11/2023] Open
Abstract
The donor-acceptor type π-conjugated polymers having heterole units were prepared by the reaction of a regioregular organometallic polymer having both reactive titanacyclopentadiene and electron-donor thiophene-2,5-diyl units in the main chain with electrophiles such as diphenyltin dichloride, dichlorophenylphosphine, and diiodophenylarsine. For example, a polymer having electron-accepting phosphole unit was obtained in 54% yield whose number-average molecular weight (Mn) and molecular weight distribution (Mw/Mn) were estimated as 3,000 and 1.9, respectively. The obtained polymer exhibits a high highest occupied molecular orbital (HOMO) and low lowest unoccupied molecular orbital (LUMO) energy levels (-5.13 eV and -3.25 eV, respectively) due to the electron-donating thiophene and electron-accepting phosphole units. Reflecting upon the alternating structure of thiophene and phosphole, the polymer exhibits a band gap energy level (Eg) of 1.78 eV which is narrower than that of a derivative of poly(thiophene) (Eg = 2.25 eV).
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Affiliation(s)
- Yoshimasa Matsumura
- Department of Chemical Science and Engineering, Graduate School of Materials and Chemical Technology, Tokyo Institute of Technology, Yokohama, JAPAN
- Department of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology, Osaka, JAPAN
| | - Alvin Tanudjaja
- Department of Chemical Science and Engineering, Graduate School of Materials and Chemical Technology, Tokyo Institute of Technology, Yokohama, JAPAN
| | - Mizuki Fukushima
- Department of Chemical Science and Engineering, Graduate School of Materials and Chemical Technology, Tokyo Institute of Technology, Yokohama, JAPAN
| | - Makoto Higuchi
- Department of Chemical Science and Engineering, Graduate School of Materials and Chemical Technology, Tokyo Institute of Technology, Yokohama, JAPAN
| | - Shin Ogino
- Department of Chemical Science and Engineering, Graduate School of Materials and Chemical Technology, Tokyo Institute of Technology, Yokohama, JAPAN
| | - Makoto Ishidoshiro
- Graduate School of Science and Technology, Kyoto Institute of Technology, Kyoto, JAPAN
| | - Yasuyuki Irie
- Graduate School of Science and Technology, Kyoto Institute of Technology, Kyoto, JAPAN
| | - Hiroaki Imoto
- Graduate School of Science and Technology, Kyoto Institute of Technology, Kyoto, JAPAN
| | - Kensuke Naka
- Graduate School of Science and Technology, Kyoto Institute of Technology, Kyoto, JAPAN
| | - Ryoyu Hifumi
- Department of Chemical Science and Engineering, Graduate School of Materials and Chemical Technology, Tokyo Institute of Technology, Yokohama, JAPAN
| | - Shinsuke Inagi
- Department of Chemical Science and Engineering, Graduate School of Materials and Chemical Technology, Tokyo Institute of Technology, Yokohama, JAPAN
| | - Ikuyoshi Tomita
- Department of Chemical Science and Engineering, Graduate School of Materials and Chemical Technology, Tokyo Institute of Technology, Yokohama, JAPAN
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Fujii T, Urushizaki A, Imoto H, Naka K. Syntheses and Photophysical Properties of Pnictogen‐ and Chalcogen‐Containing Diheteroanthracenes. ASIAN J ORG CHEM 2023. [DOI: 10.1002/ajoc.202300067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Affiliation(s)
- Toshiki Fujii
- Kyoto Institute of Technology: Kyoto Kogei Sen'i Daigaku Faculty of Molecular Chemistry and Engineering Kyoto JAPAN
| | - Aya Urushizaki
- Kyoto Institute of Technology: Kyoto Kogei Sen'i Daigaku Faculty of Molecular Chemistry and Engineering Kyoto JAPAN
| | - Hiroaki Imoto
- Kyoto Institute of Technology: Kyoto Kogei Sen'i Daigaku Faculty of Molecular Chemistry and Engineering Kyoto JAPAN
| | - Kensuke Naka
- Kyoto Institute of Technology Department of Chemistry and Materials Technoogy Goshokaido-cho, Matsugasaki, Sakyo-ku 606-8585 Kyoto JAPAN
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Sumida A, Ogawa K, Imoto H, Naka K. Steric and electronic effects of arsa-Buchwald ligands on Suzuki-Miyaura coupling reaction. Dalton Trans 2023; 52:2838-2844. [PMID: 36756968 DOI: 10.1039/d2dt04139a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The Suzuki-Miyaura coupling (SMC) reaction is one of the most commonly used cross-coupling reactions. Bulky biaryldialkyl monophosphine ligands, i.e., Buchwald ligands, are beneficial for the SMC reaction. We recently developed a synthetic procedure for arsa-Buchwald ligands, arsenic analogs of Buchwald ligands, and found that these ligands are effective for sterically hindered substrates because of facilitating the transmetalation step owing to the longer arsenic-palladium bond. However, the relationship between the structure and steric/electronic properties of the arsa-Buchwald ligands has not yet been studied in detail. In this study, a series of arsa-Buchwald ligands with various alkyl substituents were synthesized. The cyclopentyl group afforded the highest catalytic activity for the SMC reaction, particularly with sterically hindered substrates. Furthermore, the steric/electronic properties of the arsa-Buchwald ligands were computationally analyzed.
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Affiliation(s)
- Akifumi Sumida
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Kenta Ogawa
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan. .,Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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Iwasaki S, Imoto H, Naka K. Tuning emission color and efficiency of 1,2,5-triaryl-3,4-cycloalka[ c]arsoles. BCSJ 2023. [DOI: 10.1246/bcsj.20230006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Suzuka Iwasaki
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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Okamoto K, Imoto H, Naka K. Silsesquioxane cage-fused siloxane rings as a novel class of inorganic-based host molecules. BCSJ 2023. [DOI: 10.1246/bcsj.20220296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Keigo Okamoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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Fujii T, Kusukawa T, Imoto H, Naka K. Pnictogen-Bridged Diphenyl Sulfones as Photoinduced Pnictogen Bond Forming Emission Motifs. Chemistry 2023; 29:e202202572. [PMID: 36125391 DOI: 10.1002/chem.202202572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Indexed: 01/04/2023]
Abstract
In this study, pnictogen (Pn)-bridged diphenyl sulfones were synthesized as motifs for photoinduced dynamic rearrangement. The newly synthesized sulfones exhibited dual fluorescence at 298 K. Density functional theory calculations revealed that the longer-wavelength fluorescence was derived from the geometries after structural relaxation through photo-driven pnictogen bond formation between the O atom lone pair of the sulfonyl moiety and the antibonding orbital of the Pn-C bond. This is the first report on emission dynamics driven by pnictogen bond formation upon photoexcitation.
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Affiliation(s)
- Toshiki Fujii
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
| | - Takahiro Kusukawa
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan.,Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
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Karanasiou G, Grigoriadis G, Alexandraki A, Antoniades A, Brown C, Bucur A, Cipolla C, Economopoulou P, Foukakis T, Goossens J, Keramida K, Lakkas L, Marias K, Naka K, Papakonstantinou A, Pravettoni G, Ribnikar D, Šeruga B, Zacharia M, Tsiknakis M, Fotiadis D. A multimodal approach for the management of co-morbid cardiotoxicity in the elderly breast cancer patients. Eur J Cancer 2022. [DOI: 10.1016/s0959-8049(22)01456-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Fujii T, Kitagawa Y, Hasegawa Y, Imoto H, Naka K. Emission Properties of Eu(III) Complexes Containing Arsine and Phosphine Ligands with Annulated Structures. Inorg Chem 2022; 61:17662-17672. [DOI: 10.1021/acs.inorgchem.2c02757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Toshiki Fujii
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto606-8585, Japan
| | - Yuichi Kitagawa
- Faculty of Engineering and Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido060-8628, Japan
| | - Yasuchika Hasegawa
- Faculty of Engineering and Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido060-8628, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto606-8585, Japan
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto606-8585, Japan
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14
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Abstract
Despite their potential for several transition-metal-catalyzed reactions, arsenic ligands are poorly diversified. In this work, we developed an efficient synthetic methodology for AB2-type ligands, which is a typical motif in phosphorus systems, for example, in Buchwald ligands. The introduction of 1,2-benzenedithiol to tribromoarsine reduces the reactivity of two of the three reaction sites. After the substitution reaction with the first nucleophile involving the elimination of bromide, the substitution reaction with the second nucleophile produced AB2-type arsines through the elimination of the dithiolate anion. Among the various types of obtained AB2-type arsines, the arsa-Buchwald ligands, which are arsenic analogues of Buchwald ligands, were applied to the Suzuki-Miyaura cross-coupling reaction. Some of the arsa-Buchwald ligands showed activity comparable to that of the well-known Buchwald ligand, SPhos. Furthermore, the arsenic analogue of SPhos showed higher activity and stability than SPhos under open-air conditions.
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Affiliation(s)
- Akifumi Sumida
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.,Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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15
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Schultz J, Van Den Hoogen IJ, Kuneman JH, Sakellarios A, Nikopoulos S, Tsarapatsani K, Naka K, Michalis L, Fotiadis DI, Maaniitty T, Saraste A, Bax JJ, Knuuti J. Coronary computed tomography angiography based endothelial wall shear stress in normal coronary arteries. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Endothelial wall shear stress (ESS) is a biomechanical force which plays a key role in the formation and evolution of atherosclerotic lesions.
Purpose
This study aims to evaluate ESS in coronary arteries without atherosclerosis, and to assess various factors affecting ESS values.
Methods
Coronary computed tomography angiography (CCTA) images from patients with suspected coronary artery disease were analyzed to identify coronary arteries without atherosclerosis. Minimal and maximal ESS values were calculated for 3-mm segments with dedicated software. Segments were categorized according to lumen diameter tertiles into small (<2.6 mm), intermediate (2.6–3.2 mm) or large (≥3.2 mm) size classes. Normal ranges of minimal and maximal ESS values were calculated per vessel and vessel size.
Results
A total of 349 normal vessels from 168 patients (mean age 59.4±9.2 years, 39% men) were included. ESS was highest in the left anterior descending artery compared to the left circumflex and the right coronary arteries (2.3 Pa vs. 1.9 Pa vs. 1.6 Pa for minimal ESS, p<0.001 and 3.7 Pa vs. 3.0 Pa vs. 2.5 Pa for maximal ESS, p<0.001). ESS values were highest in small vessel segments compared to intermediate or large segments (3.8 Pa vs. 1.7 Pa vs. 1.2 Pa for minimal ESS, p<0.001 and 6.0 Pa vs. 2.6 Pa vs. 2.0 Pa for maximal ESS, p<0.001). Weak to moderate correlation was found between ESS and the distance from the ostium (ρ values ranging from 0.22 to 0.62 for different vessels).
Conclusion
We derived ESS values from the CCTA images for visually normal coronary arteries. ESS values depend strongly on the lumen diameter of the coronary vessel. The normal ranges of minimal and maximal ESS can be used in future studies, where ESS values in stenotic lesions are compared to the normal values derived in the present analysis.
Funding Acknowledgement
Type of funding sources: Foundation. Main funding source(s): Finnish Foundation for Cardiovascular Research
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Affiliation(s)
| | | | - J H Kuneman
- Leiden University Medical Center , Leiden , The Netherlands
| | | | | | | | - K Naka
- University of Ioannina , Ioannina , Greece
| | - L Michalis
- University of Ioannina , Ioannina , Greece
| | | | | | - A Saraste
- Turku University Hospital , Turku , Finland
| | - J J Bax
- Leiden University Medical Center , Leiden , The Netherlands
| | - J Knuuti
- Turku PET Centre , Turku , Finland
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16
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Iwasaki S, Miyake Y, Imoto H, Naka K. 1,2,5‐Triarylcycloalka[
c
]arsoles: Structural Effects of Fused‐cycloalkanes on Stability and Photophysical Properties. Chemistry 2022; 28:e202202084. [DOI: 10.1002/chem.202202084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Indexed: 11/07/2022]
Affiliation(s)
- Suzuka Iwasaki
- Faculty of Molecular Chemistry and Engineering Kyoto Institute of Technology Goshokaido-cho Matsugasaki, Sakyo-ku, Kyoto 606-8585 Japan
| | - Yusuke Miyake
- Faculty of Molecular Chemistry and Engineering Kyoto Institute of Technology Goshokaido-cho Matsugasaki, Sakyo-ku, Kyoto 606-8585 Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering Kyoto Institute of Technology Goshokaido-cho Matsugasaki, Sakyo-ku, Kyoto 606-8585 Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering Kyoto Institute of Technology Goshokaido-cho Matsugasaki, Sakyo-ku, Kyoto 606-8585 Japan
- Materials Innovation Lab Kyoto Institute of Technology Goshokaido-cho Matsugasaki, Sakyo-ku, Kyoto 606-8585 Japan
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17
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Takahara C, Iwasaki S, Kihara H, Miyake Y, Imoto H, Naka K. 4-Aryldithieno[3,2- b:2',3'- d]arsoles: effects of the As-substituent on the structure, photophysical properties, and stability. Dalton Trans 2022; 51:13734-13741. [PMID: 36004456 DOI: 10.1039/d2dt02051c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dithieno[3,2-b:2',3'-d]arsole (DTA) is one of the representative arsenic-containing conjugated units. In this work, the effects of the As-substituent on the structure, photophysical properties, and stability were investigated. Surprisingly, the As-substituent affected the structural relaxation and stability in the photo-excited state, while there was negligible effect in the ground state. Bulky substituents resulted in red-shifted emissions due to the relaxation of steric repulsion upon photo-excitation. In addition, the crystal structure highly affected the photo-degradation behaviors.
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Affiliation(s)
- Chisa Takahara
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Suzuka Iwasaki
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Hyota Kihara
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Yusuke Miyake
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan. .,Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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18
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Chishiro A, Akioka I, Sumida A, Oka K, Tohnai N, Yumura T, Imoto H, Naka K. Tetrachlorocatecholates of triarylarsines as a novel class of Lewis acids. Dalton Trans 2022; 51:13716-13724. [PMID: 36004500 DOI: 10.1039/d2dt02145e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pnictogen-mediated Lewis acidity is an emerging research subject in organic chemistry, supramolecular chemistry, etc. In contrast to the extensive studies on phosphorus and antimony, the diversity of arsenic-Lewis acids was quite limited. Herein, tetrachlorocatecholates of triarylarsines were newly synthesized. Their structures, electronic properties, and Lewis acidities were experimentally and computationally examined and compared with the corresponding phosphorus and antimony analogs. This is the first systematic study on the relationship between the structure and Lewis acidity of arsenic-mediated Lewis acids.
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Affiliation(s)
- Akane Chishiro
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Ippei Akioka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Akifumi Sumida
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Kouki Oka
- Center for Future Innovation (Cfi) and Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Norimitsu Tohnai
- Center for Future Innovation (Cfi) and Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takashi Yumura
- Faculty of Material Science and Technology, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan. .,Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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19
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Tsuji S, Kobayashi K, Fujii T, Imoto H, Naka K, Aso Y, Ohara H, Tanaka T. Polymers with Pendant Water‐soluble Tetrafluorobenzene Sulfonic Acid Activated Esters: Synthesis, Stability, and Use for Glycopolymers in Water. MACROMOL CHEM PHYS 2022. [DOI: 10.1002/macp.202200072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sotaro Tsuji
- Department of Biobased Materials Science Graduate School of Science and Technology Kyoto Institute of Technology Matsugasaki, Sakyo‐ku Kyoto 606–8585 Japan
| | - Kazuma Kobayashi
- Department of Biobased Materials Science Graduate School of Science and Technology Kyoto Institute of Technology Matsugasaki, Sakyo‐ku Kyoto 606–8585 Japan
| | - Toshiki Fujii
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Matsugasaki, Sakyo‐ku Kyoto 606–8585 Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Matsugasaki, Sakyo‐ku Kyoto 606–8585 Japan
- Materials Innovation Lab Kyoto Institute of Technology Matsugasaki, Sakyo‐ku Kyoto 606–8585 Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Matsugasaki, Sakyo‐ku Kyoto 606–8585 Japan
- Materials Innovation Lab Kyoto Institute of Technology Matsugasaki, Sakyo‐ku Kyoto 606–8585 Japan
| | - Yuji Aso
- Department of Biobased Materials Science Graduate School of Science and Technology Kyoto Institute of Technology Matsugasaki, Sakyo‐ku Kyoto 606–8585 Japan
| | - Hitomi Ohara
- Department of Biobased Materials Science Graduate School of Science and Technology Kyoto Institute of Technology Matsugasaki, Sakyo‐ku Kyoto 606–8585 Japan
| | - Tomonari Tanaka
- Department of Biobased Materials Science Graduate School of Science and Technology Kyoto Institute of Technology Matsugasaki, Sakyo‐ku Kyoto 606–8585 Japan
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20
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Kihara H, Imoto H, Naka K. Synthesis of main-chain-type triphenylarsine polymers. Polym J 2022. [DOI: 10.1038/s41428-022-00653-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Abstract
Heteroatom-fused π-conjugated molecules have attracted considerable attention, and various elements for such fusion have been investigated. Herein, we focused on pnictogen-fused heterofluorenes. The structures, reactivity with O2 and I2, coordination ability to AuCl, and photophysical properties were systematically studied to better understand the effects of pnictogen atoms on the nature of π-conjugated molecules.
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Affiliation(s)
- Ryoto Inaba
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kouki Oka
- Center for Future Innovation (CFI) and Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takahiro Iwami
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Yusuke Miyake
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kunihiko Tajima
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.,Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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22
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23
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Igarashi A, Imoto H, Naka K. Polymethacrylates containing cage-silsesquioxanes in the side chains: effects of cage and linker structures on film properties. Polym Chem 2022. [DOI: 10.1039/d1py01709h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Polymers in which cage-silsesquioxanes were tethered through urethane linkers, were newly synthesized. The free-standing films were supported by the hydrogen bonding networks. Their properties were dependent on the cage structure.
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Affiliation(s)
- Amato Igarashi
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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24
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Yukiyasu J, Inaba R, Yumura T, Imoto H, Naka K. Rational design of arsine catalysts for arsa-Wittig reaction. Org Chem Front 2022. [DOI: 10.1039/d2qo01480g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
An acyclic arsine catalyst has been developed for the room-temperature catalytic arsa-Wittig reaction. The reaction mechanism has been computationally analyzed.
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Affiliation(s)
- Junya Yukiyasu
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Ryoto Inaba
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Takashi Yumura
- Faculty of Material Science and Technology, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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25
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Kamitani T, Imoto H, Naka K. Soluble and processable thermoplastic hybrid polyimides containing POSS in main chains. Polym Chem 2022. [DOI: 10.1039/d2py00980c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The combination of 3,13-bis(3-aminopropyl)-double-decker-shaped-silsesquioxane and a fluorinated dianhydride produces a flexible polyimide with a low Tg, high heat resistance, and excellent solvent solubility. The fluorinated dianhydride loosened the interchain packing to suppress CT interactions, leading to the formation of a colorless polyimide.
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Affiliation(s)
- Tasuku Kamitani
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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26
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Nagao M, Hayashi T, Imoto H, Naka K. Unsymmetric Dumbbell-Shaped Polyhedral Oligomeric Silsesquioxane (POSS) Compound as a Single-Component POSS Hybrid. Langmuir 2021; 37:14777-14784. [PMID: 34882423 DOI: 10.1021/acs.langmuir.1c02906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Dumbbell-shaped polyhedral oligomeric silsesquioxane (POSS) derivatives, in which two POSS units are linked through a bridge, have attracted attention in the last decade. Here, we prepared an unsymmetric dumbbell-shaped POSS derivative (3Ph-iBu) in which isobutyl- and phenyl-substituted POSS units are linked by a disiloxane unit and compared its thermal properties with those of the corresponding symmetric isobutyl- and phenyl-substituted dumbbell-shaped POSS derivatives (3iBu-iBu and 3Ph-Ph, respectively). The symmetric isobutyl- and phenyl-substituted dumbbell-shaped POSS derivatives, 3iBu-iBu and 3Ph-Ph, were almost completely phase-separated during a mixing process. This phase separation is due to the limited solubility of phenyl-substituted POSS compounds, which are only soluble in tetrahydrofuran (THF) and insoluble in hydrocarbons such as n-hexane and toluene, while the isobutyl-substituted POSS derivatives exhibit a wider spectrum of soluble solvents. The unsymmetric dumbbell-shaped POSS, 3Ph-iBu, showed hybrid properties of solubility in solvents and thermal behaviors. Differential scanning calorimetric (DSC) analysis showed that enthalpy of the phase transition of 3Ph-iBu was significantly lower than those of the mixture of 3iBu-iBu and 3Ph-Ph. No apparent melting behavior was observed above the phase transition. The thermal degradation of the weakest isobutyl substituents improves in the present single-component hybrid structure.
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Affiliation(s)
- Mayu Nagao
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Taihei Hayashi
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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27
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Abstract
The Stille coupling reaction is one of the most important coupling reactions. It is well known that the triphenylarsine ligand can accelerate the reaction rate of Stille coupling. However, other arsine ligands have never been investigated for the Stille coupling reaction so far. In this work, we prepared 13 kinds of C3-symmetrical tertiary arsine ligands and discovered that tri(p-anisyl)arsine is the best ligand for the reaction of tributylvinyltin and p-iodoanisole. The reaction mechanism was studied by dispersion-corrected density functional theory calculations to demonstrate the energetic feasibility of the Stille coupling reactions mediated by tri(p-anisyl)arsine.
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Affiliation(s)
- Akane Chishiro
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Masafumi Konishi
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Ryoto Inaba
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Takashi Yumura
- Faculty of Material Science and Technology, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan. .,Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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28
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Kikuchi K, Sumida A, Imoto H, Naka K. Phosphorescent Metallacrown Ethers Enchained Through Coordination of Arsafluorene to Platinum(II) Dihalide. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kazuma Kikuchi
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
| | - Akifumi Sumida
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
- Materials Innovation Lab, Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
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29
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Okamoto K, Igarashi A, Imoto H, Naka K. Reversible addition‐fragmentation chain transfer cyclopolymerization of dimethacryloyl open‐cage silsesquioxane. Journal of Polymer Science 2021. [DOI: 10.1002/pol.20210705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Keigo Okamoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology Kyoto Institute of Technology Kyoto Japan
| | - Amato Igarashi
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology Kyoto Institute of Technology Kyoto Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology Kyoto Institute of Technology Kyoto Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology Kyoto Institute of Technology Kyoto Japan
- Materials Innovation Lab Kyoto Institute of Technology Kyoto Japan
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30
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Abstract
Macrocyclic π-skeletons containing a thiazole moiety were synthesized via MacDonald [3 + 1]-type condensation. The construction of thiazolochlorin 1a and thiazoloporphyrin 1b depended on the conformation of the thiazole moieties, and their 18π-systems expanded along the molecular y and x axes, respectively. In particular, the structure of thiazolochlorin 1a was studied in detail using 2D nuclear magnetic resonance methods. The optical properties in solution were measured and discussed based on both experimental data and computational studies.
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Affiliation(s)
- Takeo Nakano
- Material Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.,Research Center for Negative Emission Technologies (K-NETs), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan.,International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Material Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.,Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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31
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Affiliation(s)
- Hyota Kihara
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
- Materials Innovation Lab Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
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32
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Affiliation(s)
- Suzuka Iwasaki
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
| | - Hyota Kihara
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
- Materials Innovation Lab Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
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Nakano T, Sumida A, Naka K. Mechanochromic Properties of Boron‐Difluoride Complexes Bearing π‐Expanded Pyridine Ligands: Effects of π‐Conjugated Skeletons and Halogen Atoms. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100407] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Takeo Nakano
- Material Innovation Lab Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585 Japan
- Research Center for Negative Emission Technologies Kyushu University 744 Moto-oka, Nishi-ku Fukuoka 819-0395 Japan
- International Institute for Carbon-Neutral Energy Research (WPI−I2CNER) Kyushu University 744 Moto-oka, Nishi-ku Fukuoka 819-0395 Japan
| | - Akifumi Sumida
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585 Japan
| | - Kensuke Naka
- Material Innovation Lab Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585 Japan
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585 Japan
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Shichibu Y, Zhang F, Chen Y, Konishi M, Tanaka S, Imoto H, Naka K, Konishi K. Diarsine- vs diphosphine-protected Au 13 clusters: Effect of subtle geometric differences on optical property and electronic structure. J Chem Phys 2021; 155:054301. [PMID: 34364349 DOI: 10.1063/5.0059607] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
In the design of ligand-protected metal clusters, the choice of protecting ligands is a critical factor because they can profoundly affect the nuclearity, geometry, and electronic structures to afford a diverse range of cluster compounds. Here, we report the synthesis of two novel diarsine-protected Au13 clusters ([Au13L5Cl2]3+, L = diarsine) and compare these clusters with diphosphine analogs in terms of the core geometry and optical properties. In the crystal structure, the cluster bearing C3-bridged diarsines {[Au13(dpap)5Cl2]3+, 3} had an apparently identical icosahedral Au13 core to [Au13(dppe)5Cl2]3+ (1) with C2-bridged diphosphines, but slight structural differences associated with the bridging unit of the ligands were found. Despite similar icosahedral Au13 cores 1 and 3, their absorption and photoluminescence profiles were evidently different. Theoretical calculations revealed that the subtle deformation of the Au13 icosahedron, rather than the coordinating atoms (As or P), notably influences the electronic structure to cause the difference in the absorption profiles.
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Affiliation(s)
- Yukatsu Shichibu
- Graduate School of Environmental Science, Hokkaido University, North 10 West 5, Sapporo 060-0810, Japan
| | - Fan Zhang
- Graduate School of Environmental Science, Hokkaido University, North 10 West 5, Sapporo 060-0810, Japan
| | - Yuxiang Chen
- Graduate School of Environmental Science, Hokkaido University, North 10 West 5, Sapporo 060-0810, Japan
| | - Masafumi Konishi
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Susumu Tanaka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Katsuaki Konishi
- Graduate School of Environmental Science, Hokkaido University, North 10 West 5, Sapporo 060-0810, Japan
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35
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Lee H, Nakamura S, Imoto H, Naka K. Reversible pH Responsive Aggregation Behavior of Size-Controlled Calcium Carbonate Composite Nanoparticles by Phytic Acid in Aqueous Solution. Langmuir 2021; 37:7712-7719. [PMID: 34024095 DOI: 10.1021/acs.langmuir.1c00744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Composite colloidal nanoparticles were prepared by a carbonate controlled-addition method in the presence of phytic acid, in which an aqueous ammonium carbonate solution was added into an aqueous solution of phytic acid and CaCl2. The number-average particle size of the colloidal particles was 76 ± 18 nm formed by using the molar ratio [phytic acid]/[Ca2+] = 0.5 from the complexation time of 1 h. The composite nanoparticles were stable for more than 5 days in the suspension under the quiescent condition. After isolation of the nanoparticles by ultrafiltration, the dried samples could be redispersed in water. Effects of the complexation times of the aqueous solution of phytic acid and CaCl2 and the molar ratio ([phytic acid]/[Ca2+]) were studied. Increasing the concentration of the calcium reagents as well as increasing the complexation times increased the particle sizes. The minimum and maximum average particle sizes of 29 and 142 nm were obtained. The plot of the transmittance at 350 nm of the aqueous solution of the dispersion against pH values after addition of 0.05 M HCl for 6 h showed that, by gradually increasing turbidity with decreasing pH from 9.6 to 7.3, precipitates were recognized at below pH 7.5, and turbidity decreased with further decreasing pH beyond 7.2. Dynamic light scattering analysis showed that the particle diameters increased from 90 to 200 nm with decreasing pH from 9.6 to 7.2. When increasing the pH from 6.2, the precipitate was redispersed and the turbidity increased to a pH of 7.4. No precipitates were observed above a pH of 7.4. These results suggest that the present phytic acid stabilized nanoparticles exhibit pH-dependent reversible precipitation and redispersion without degradation under slightly acidic conditions.
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Affiliation(s)
- Haekyung Lee
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Shiho Nakamura
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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Fujii T, Kitagawa Y, Hasegawa Y, Imoto H, Naka K. Drastic Enhancement of Photosensitized Energy Transfer Efficiency of a Eu(III) Complex Driven by Arsenic. Inorg Chem 2021; 60:8605-8612. [PMID: 34087071 DOI: 10.1021/acs.inorgchem.1c00577] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this study, we focused on arsenic as a new potential motif for the ligand design of high-efficiency, luminous lanthanide complexes. A Eu3+ complex bearing triphenylarsine oxide had a photosensitized energy-transfer efficiency 7.9 times higher than that of a Eu3+ complex bearing triphenylphosphine oxide. This is mainly due to the heavy-atom effect of arsenic, which was supported by evaluating the photoluminescence spectra of their corresponding Gd3+ complexes.
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Affiliation(s)
- Toshiki Fujii
- Faculty of Molecular Chemistry and Engineering and Materials Innovation Lab, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Yuichi Kitagawa
- Faculty of Engineering and Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Yasuchika Hasegawa
- Faculty of Engineering and Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering and Materials Innovation Lab, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering and Materials Innovation Lab, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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37
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Sumida A, Imoto H, Naka K. Turn-on type sensing of methanol vapor by a luminescent platinum(II) dichloride complex with 21-dibenzoarsacrown-7. Dalton Trans 2021; 50:6682-6687. [PMID: 33908533 DOI: 10.1039/d1dt01133b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The development of turn-on detection sensors for methanol vapor remains challenging in materials science. Methanol sensing materials are generally based on vapor-triggered color changes or are turn-off types. Additionally, in general, the selectivity for methanol is limited, and the recyclability is low. Turn-on type sensing, high selectivity, rapid response time, and recyclability are favorable for achieving real-time detection systems. Herein, platinum(ii) dihalide (PtX2, X = Cl, Br, and I) complexes with 21-dibenzoarsacrown-7 were synthesized and their structures were characterized by single-crystal diffraction analysis. The PtCl2 complex showed intense emission when capturing methanol molecules in the crystalline matrix. In addition, this sensing system possessed high selectivity for methanol vapor and required facile recycling procedures.
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Affiliation(s)
- Akifumi Sumida
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan. and Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan. and Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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38
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Kobayashi R, Inaba R, Imoto H, Naka K. Multi-Mode Switchable Luminescence of Tetranuclear Cubic Copper(I) Iodide Complexes with Tertiary Arsine Ligands. BCSJ 2021. [DOI: 10.1246/bcsj.20210005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ryosuke Kobayashi
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Ryoto Inaba
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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39
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Nakano T, Sumida A, Naka K. Synthesis and Characterization of Boron Difluoride Complexes Bearing π-Expanded Pyridine Ligands as Organic Fluorochromes. J Org Chem 2021; 86:5690-5701. [DOI: 10.1021/acs.joc.1c00201] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Takeo Nakano
- Material Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Akifumi Sumida
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Material Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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40
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Ishijima K, Tanaka S, Imoto H, Naka K. 2,3-Diarylbenzo[b]arsole: Structural Modification and Polymerization for Tuning of Photophysical Properties. Chemistry 2021; 27:4676-4682. [PMID: 33415783 DOI: 10.1002/chem.202005001] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/20/2020] [Indexed: 11/09/2022]
Abstract
2,3-Diarylbenzo[b]arsoles were synthesized from zirconacycles and diiodophenylarsine. The structural modification to the luminophore was attained through diarylacetylene precursors, Suzuki-Miyaura coupling, and oxidation of the arsenic atom. The emission properties were controlled according to these modifications. The 2,3-diarylbenzo[b]arsoles showed aggregation-induced emission enhancement; the stronger emission was observed in the solid states than in solutions. In addition, Suzuki-Miyaura polycondensation and olefin metathesis polymerization produced main- and side-chain polymers, respectively. The resultant polymers showed different emission behaviors such as aggregation caused quenching and aggregation induced emission enhancement.
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Affiliation(s)
- Kosuke Ishijima
- Faculty of Molecular Chemistry and Engineering, Graduate School of, Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
| | - Susumu Tanaka
- Faculty of Molecular Chemistry and Engineering, Graduate School of, Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of, Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan.,Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of, Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan.,Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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41
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Sumida A, Kobayashi R, Yumura T, Imoto H, Naka K. Dibenzoarsacrowns: an experimental and computational study on the coordination behaviors. Chem Commun (Camb) 2021; 57:2013-2016. [PMID: 33416057 DOI: 10.1039/d0cc07191a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Dibenzoarsacrowns have been synthesized as a novel class of heteroatom-fused crown ethers. The dibenzoarsacrowns can size-selectively capture alkali metal cations, and the arsenic atoms chemoselectively coordinated to gold(i) chloride (AuCl) due to the soft Lewis acid-base interaction. It is notable that the AuCl complex of 21-dibenzoarsacrown-7 further encapsulated Na+ with the enhanced association constant from bare 21-dibenzoarsacrown-7. The positive allosteric effect was studied computationally.
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Affiliation(s)
- Akifumi Sumida
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
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42
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Sasaki H, Akioka I, Imoto H, Naka K. Arsenic‐Bridged Silafluorene and Germafluorene as a Novel Class of Mixed‐Heteroatom‐Bridged Heterofluorenes. European J Org Chem 2021. [DOI: 10.1002/ejoc.202001644] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Hiroshi Sasaki
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
| | - Ippei Akioka
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
- Materials Innovation Lab Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
- Materials Innovation Lab Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
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43
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Yamazawa C, Hirano Y, Imoto H, Tsutsumi N, Naka K. Superior light-resistant dithieno[3,2-b:2',3'-d]arsole-based polymers exhibiting ultrastable amplified spontaneous emission. Chem Commun (Camb) 2021; 57:1595-1598. [PMID: 33480894 DOI: 10.1039/d0cc07521c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Herein, by amplified spontaneous emission measurements, dithieno[3,2-b:2',3'-d]arsole (DTA)-bithiophene (DTA-BT) and DTA-ethynylbenzene (DTA-EB) polymer films exhibited considerable photostability under continuous pulsed pumping excitation for at least 15 h at the pumping energies, 28.9 and 20.7 μJ, respectively, showing an outstanding high light-resistance among the polymer-based gain media.
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Affiliation(s)
- Chieko Yamazawa
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
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Affiliation(s)
- Ryosuke Kobayashi
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hyota Kihara
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Takahiro Kusukawa
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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45
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Affiliation(s)
- Takeo Nakano
- Material Innovation Lab Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
| | - Akifumi Sumida
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
| | - Kensuke Naka
- Material Innovation Lab Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
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46
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Akioka I, Sumida A, Urushizaki A, Imoto H, Naka K. Front Cover: (
p‐
(Diphenylarsino)phenyl)diphenylphosphine as a Novel Template for Heterodinuclear Complexes (2/2021). ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202000699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ippei Akioka
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan) (HI) (KN
| | - Akifumi Sumida
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan) (HI) (KN
| | - Aya Urushizaki
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan) (HI) (KN
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan) (HI) (KN
- Materials Innovation Lab Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan) (HI) (KN
- Materials Innovation Lab Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
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47
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Igarashi A, Ueda Y, Katoh R, Imoto H, Naka K. Highly selective mono‐functionalization of open‐cage silsesquioxane toward film‐formable homopolymer. Journal of Polymer Science 2021. [DOI: 10.1002/pol.20200710] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Amato Igarashi
- Faculty of Molecular Chemistry and Engineering Kyoto Institute of Technology Kyoto Japan
| | - Yukiho Ueda
- Faculty of Molecular Chemistry and Engineering Kyoto Institute of Technology Kyoto Japan
| | - Ryoichi Katoh
- Faculty of Molecular Chemistry and Engineering Kyoto Institute of Technology Kyoto Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering Kyoto Institute of Technology Kyoto Japan
- Materials Innovation Lab Kyoto Institute of Technology Kyoto Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering Kyoto Institute of Technology Kyoto Japan
- Materials Innovation Lab Kyoto Institute of Technology Kyoto Japan
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48
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Kobayashi R, Yumura T, Imoto H, Naka K. Homo- and hetero-metallophilicity-driven synthesis of highly emissive and stimuli-responsive Au(i)–Cu(i) double salts. Chem Commun (Camb) 2021; 57:5382-5385. [DOI: 10.1039/d1cc01316e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Discrete complex salts having Au···Au and Au···Cu interactions were obtained as three crystalline polymorphs exhibiting various emission colors with high efficiency. Solvent vapor caused crystal-to-crystal transition, changing the emission color.
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Affiliation(s)
- Ryosuke Kobayashi
- Faculty of Molecular Chemistry and Engineering
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Takashi Yumura
- Faculty of Material Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
- Materials Innovation Lab
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
- Materials Innovation Lab
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Ueda Y, Imoto H, Okada A, Xu H, Yamane H, Naka K. Hybrid polyurethanes composed of isobutyl-substituted open-cage silsesquioxane in the main chains: synthesis, properties and surface segregation in a polymer matrix. Polym Chem 2021. [DOI: 10.1039/d1py00329a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The resulting polyurethanes exhibited excellent optical transparency and surface hydrophobicity and acted as effective surface modifiers in poly(methyl methacrylate) (PMMA) by surface segregation.
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Affiliation(s)
- Yukiho Ueda
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto
- Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto
- Japan
| | - Arifumi Okada
- Faculty of Materials Science and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto
- Japan
| | - Huaizhong Xu
- Faculty of Fiber Science and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto
- Japan
| | - Hideki Yamane
- Faculty of Fiber Science and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto
- Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto
- Japan
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Ishida A, Fujii S, Sumida A, Kamitani T, Minami S, Urayama K, Imoto H, Naka K. Supramolecular organogel formation behaviors of beads-on-string shaped poly(azomethine)s dependent on POSS structures in the main chains. Polym Chem 2021. [DOI: 10.1039/d1py00346a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Organogel formation was observed for isobutyl-substituted cage octasilsesquioxane (T8) in the main-chain type polyazomethines, while precipitates instead of gel formation were observed for phenyl-substituted double-decker-shaped silsesquioxanes (DDSQ)-poly(azomethine)s.
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Affiliation(s)
- Ayano Ishida
- Faculty of Molecular Chemistry and Engineering
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Shunichi Fujii
- Faculty of Molecular Chemistry and Engineering
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Akifumi Sumida
- Faculty of Molecular Chemistry and Engineering
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Tasuku Kamitani
- Faculty of Molecular Chemistry and Engineering
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Saori Minami
- Faculty of Material Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Kenji Urayama
- Faculty of Material Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
- Materials Innovation Lab
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