1
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Mori A, Pathak A, Watanabe S, Kunitake M. Chemical Recycling and Physical Tuning of Necklace-Shaped Polydimethylsiloxanes Bearing Anthracene Dimer Units. Macromol Rapid Commun 2024; 45:e2300658. [PMID: 38362957 DOI: 10.1002/marc.202300658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/25/2023] [Indexed: 02/17/2024]
Abstract
The problem of plastic waste in the environment calls for the development of new polymeric materials designed specifically for easy recycling at the end of their life cycle. Herein, a green polymer system comprising a series of necklace-shaped polydimethylsiloxanes bearing anthracene dimer units is developed. The polymers have low environmental impact and are easily recycled. Further, their flexibility and glass transition temperatures are easy to control. These necklace-shaped inorganic polymers are synthesized by photopolymerizing (dimerizing) anthracene-terminated oligo-dimethylsiloxane monomers. A key achievement of the present work is the successful chemical recovery of the monomers from the polymers through thermal depolymerization, enabling monomer-polymer recycling. By applying equilibrium polymerization with base catalysts, monomers with a controlled distributed chain length are synthesized from monomers with a constant chain length. The necklace-shaped polymers synthesized from these randomized monomers have amorphous structures and readily form transparent films. It is possible to modulate the thermal and mechanical properties of the polymers by controlling the average chain length of the polydimethylsiloxane between the anthracene dimers. This investigation presents a method for the synthesis and cyclic utilization of polymer materials with a wide range of applications, including plastics and elastomers.
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Affiliation(s)
- Atsuro Mori
- Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto, 860-8555, Japan
| | - Agamoni Pathak
- Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto, 860-8555, Japan
| | - Satoshi Watanabe
- Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan
| | - Masashi Kunitake
- Institute of Industrial Nanomaterials, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan
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2
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Fuchs K, Nizioł E, Ejfler J, Zierkiewicz W, Władyczyn A, John Ł. What do we know about bifunctional cage-like T 8 silsesquioxanes? Theory versus lab routine. Dalton Trans 2023; 52:16607-16615. [PMID: 37791497 DOI: 10.1039/d3dt02638h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
In this article, we explore theoretical validations of experimental findings pertaining to the classical corner-capping reactions of a commercially available heptaisobutyltrisilanol cage to mono-substituted phenylhepta(isobutyl)-POSS cages. Additionally, the process of opening a fully condensed cage is tracked to assess the possibility of isolating and separating the resulting isomers. The corner-capping reactions of potential silanotriols, both as monomers and dimers, and the impact of these structural motifs on their closing to bifunctional POSS cages are also investigated. Our studies highlight that analyzing experimental results alone, without incorporating complex theoretical investigations, does not offer a clear understanding of the reactions involving multiple simultaneously reacting substrates, which may also undergo further transformations, potentially complicating the conventional pathways of classic corner-opening/capping reactions.
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Affiliation(s)
- Kamila Fuchs
- Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland.
| | - Edyta Nizioł
- Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland.
| | - Jolanta Ejfler
- Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland.
| | - Wiktor Zierkiewicz
- Faculty of Chemistry, Wrocław University of Science and Technology, 27 Wybrzeże Wyspiańskiego, 50-370 Wrocław, Poland
| | - Anna Władyczyn
- Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland.
| | - Łukasz John
- Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland.
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3
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Novel hybrid composites based on double-decker silsesquioxanes functionalized by methacrylate derivatives and polyvinyl alcohol as potential materials utilized in biomedical applications. BIOMATERIALS ADVANCES 2023; 146:213290. [PMID: 36682203 DOI: 10.1016/j.bioadv.2023.213290] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 01/04/2023] [Accepted: 01/12/2023] [Indexed: 01/15/2023]
Abstract
The use of diverse biomaterials for regenerative medicine is constantly evolving. Therefore, looking for easy-to-scale-up materials in terms of preparation, less complex composition, and featuring structural and chemical stability seems justified. In this work, we report the preparation of double-decker silsesquioxane-based (DDSQ-based) composites, which, according to our best knowledge, have never been used as biomaterials. A family of methacrylate-substituted DDSQs was obtained starting from the previously reported hydroxyalkyl double-decker silsesquioxanes. In the resulting hybrids, methacrylate groups are attached to each other's lateral silicon atoms of DDSQ in trans positions, providing an excellent geometry for forming thin layers. In contrast to pure organic methacrylates, the covalent bonding of methacrylate derivatives to inorganic silsesquioxane core improves mechanics, cell adhesion, and migration properties. Furthermore, to increase the hydrophilicity of the resulting DDSQ-based hybrids, polyvinyl alcohol (PVA) was added. The entire system forms an easy-to-obtain two-component (DDSQ-PVA) composite, which was subjected without any upgrading additives to biological tests later in the research. The resulting biomaterials fulfill the requirements for potential medical applications. Human fibroblasts growing on prepared hybrid composites are characterized by proper spindle-shaped morphology, proliferation, and activation status similar to control conditions (cells cultured on PVA), as well as increased adhesion and migration abilities. The obtained results suggest that the prepared biomaterials may be used in regenerative medicine in the future.
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4
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Gon M, Tanaka K, Chujo Y. Recent Progresses on Designable Hybrids with Stimuli-Responsive Optical Properties Originating from Molecular Assembly Concerning Polyhedral Oligomeric Silsesquioxane. Chem Asian J 2022; 17:e202200144. [PMID: 35322576 DOI: 10.1002/asia.202200144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/18/2022] [Indexed: 11/10/2022]
Abstract
In this review, we describe recent progresses on the stimuli-responsive hybrid materials based on polyhedral oligomeric silsesquioxane (POSS) and their applications as a chemical sensor. In particular, we explain the unique functions originating from molecular assembly concerning POSS-containing soft materials mainly from our studies. POSS has an inorganic cubic core composed of silicon-oxygen (Si-O) bonds and organic substituents at each vertex. Owing to intrinsic properties of POSS, such as high thermal stability, rigidity, and low chemical reactivity, various robust hybrid materials have been developed. From the numerous numbers of POSS hybrids, we herein focus on the environment-sensitive optical materials in which molecular assembly of POSS itself and functional units connected to POSS should be a key factor for expressing material properties. We also explain the mechanisms of chemical sensors originating from these stimuli-responsive optical properties. Stimuli-responsive excimer emission and pollutant detectors, nanoplastic sensors with the water-dispersive POSS networks, trans fatty acid sensors, turn-on luminescent sensors for aerobic condition and fluoride anion sensors are described. We also mention the mechanochromic polyurethane hybrids and the thermally-durable mechanochromic luminescent materials. The roles of the unique optical properties from soft materials composed of rigid POSS, which doesn't have significant light-absorption and emission properties in the visible region, are surveyed.
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Affiliation(s)
- Masayuki Gon
- Kyoto University: Kyoto Daigaku, Polymer Chemistry, Kyoto University, Katsura Nishikyo-ku, 615-8510, Kyoto, JAPAN
| | - Kazuo Tanaka
- Kyoto University, Graduate School of Engineering, Department of Polymer Chemistry, Katsura, Nishikyo-ku, 615-8510, Kyoto, JAPAN
| | - Yoshiki Chujo
- Kyoto University: Kyoto Daigaku, Polymer chemistry, Kyoto University, Katsura Nishikyo-ku, 615-8510, Kyoto, JAPAN
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5
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Jin L, Hong C, Li X, Sun Z, Feng F, Liu H. Corner-opening and corner-capping of mono-substituted T 8 POSS: product distribution and isomerization. Chem Commun (Camb) 2022; 58:1573-1576. [PMID: 35014992 DOI: 10.1039/d1cc06258a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We applied chromatographic and spectroscopic techniques to revisit the product distribution of the corner-opening and corner-capping reactions of monosubstituted T8 POSS. The monosubstituted Si is more likely to be removed than the remaining seven Si atoms during the corner-opening. After the corner-capping, the yield of monosubstituted T8 POSS is much higher than the yields of the ortho- and meta-isomers of disubstituted T8 POSS, and the para-isomer is negligible.
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Affiliation(s)
- Liang Jin
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China.
| | - Chengyang Hong
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China.
| | - Xiangqian Li
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China.
| | - Zhiyan Sun
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China.
| | - Fengfeng Feng
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China.
| | - Hao Liu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China.
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6
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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] [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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7
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Supramolecular organogel of polyureas containing POSS units in the main chain: dependence on the POSS and comonomer structures. Polym J 2021. [DOI: 10.1038/s41428-021-00578-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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8
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POSS cage-scrambling-induced gelation of POSS-pendant random copolymers catalyzed by fluoride anions. Polym J 2021. [DOI: 10.1038/s41428-021-00523-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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9
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Preparation of Soluble POSS-Linking Polyamide and Its Application in Antifogging Films. MATERIALS 2021; 14:ma14123178. [PMID: 34207665 PMCID: PMC8229800 DOI: 10.3390/ma14123178] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 06/05/2021] [Accepted: 06/07/2021] [Indexed: 11/22/2022]
Abstract
In this study, we prepared a polyhedral oligomeric silsesquioxane (POSS)-linking polyamide (POSS polyamide) by a polycondensation of ammonium-functionalized POSS (POSS-A) and carboxyl-functionalized POSS (POSS-C) in dehydrated dimethyl sulfoxide (DMSO) using 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC) and N-hydroxysuccinimide (NHS) as condensing agents. The obtained POSS polyamide was soluble in various highly polar solvents, and it could form a self-standing film. FT-IR, 1H NMR, and 29Si NMR analyses showed that POSS polyamide is a polymer in which POSS-A and POSS-C are linked almost linearly by amide bonds. Furthermore, the cast film obtained by heat-treating the polymer at 150 °C for 30 min exhibited excellent transparency and hard-coating (pencil scratch test: 5H) and antifogging properties (evaluation by water vapor exposure).
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10
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Tsukada S, Ogawa T, Susami Y, Yamamoto K, Gunji T. Easy and environmentally friendly synthesis method for T 8H (HSiO 3/2) 8. PHOSPHORUS SULFUR 2021. [DOI: 10.1080/10426507.2020.1833332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Satoru Tsukada
- Department of Materials Science, Graduate School of Engineering, Chiba University, Chiba, Japan
| | - Takuya Ogawa
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, Chiba, Japan
| | - Yuma Susami
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, Chiba, Japan
| | - Kazuki Yamamoto
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, Chiba, Japan
| | - Takahiro Gunji
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, Chiba, Japan
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11
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Fuchise K, Sato K, Igarashi M. Organocatalytic controlled/living ring-opening polymerization of 1,3,5-triphenyl-1,3,5-tri- p-tolylcyclotrisiloxane for the precise synthesis of fusible, soluble, functionalized, and solid poly[phenyl( p-tolyl)siloxane]s. Polym Chem 2021. [DOI: 10.1039/d1py00652e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An organocatalytic controlled/living ring-opening polymerization (ROP) of 1,3,5-triphenyl-1,3,5-tri(p-tolyl)cyclotrisiloxane (PT3) produced linear poly[phenyl(p-tolyl)siloxane] (PPTS) with controlled structures.
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Affiliation(s)
- Keita Fuchise
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Kazuhiko Sato
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Masayasu Igarashi
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
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12
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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] [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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13
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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] [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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14
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Li L, Imoto H, Naka K. Soluble network polymers based on
trifluoropropyl‐substituted open‐cage
silsesquioxane: Synthesis, properties, and application for surface modifiers. J Appl Polym Sci 2020. [DOI: 10.1002/app.50167] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Lina Li
- 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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15
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Miyanaga T, Naga N. Phase and Morphology Control of Organic-Inorganic Hybrid Network Polymer by Means of Hydrosilylation Reaction of Cubic Silsesquioxane or Cyclic Polysiloxane and Divinyl or Diallyl Compounds. CHEM LETT 2020. [DOI: 10.1246/cl.200421] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Tomoharu Miyanaga
- Graduate School of Engineering and Science, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan
| | - Naofumi Naga
- Graduate School of Engineering and Science, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan
- Department of Applied Chemistry, College of Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan
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16
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Sato Y, Imoto H, Naka K. Soluble and film‐formable homopolymer tethering side‐opened cage silsesquioxane pendants. JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1002/pol.20200161] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Yuri Sato
- 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
- Materials Innovation Lab 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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17
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Hashimoto M, Imoto H, Matsukawa K, Naka K. Coexistence of Optical Transparency, Hydrophobicity, and High Thermal Conductivity in Beads-on-String-Shaped Polyureas Induced by Disordered Hydrogen-Bond Networks. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00270] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Mari Hashimoto
- 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
| | - Kimihiro Matsukawa
- 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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18
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Imoto H, Ueda Y, Sato Y, Nakamura M, Mitamura K, Watase S, Naka K. Corner‐ and Side‐Opened Cage Silsesquioxanes: Structural Effects on the Materials Properties. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.201901182] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido‐cho, Matsugasaki, Sakyo‐ku 606‐8585 Kyoto Japan
- Materials Innovation Lab Kyoto Institute of Technology Goshokaido‐cho, Matsugasaki, Sakyo‐ku 606‐8585 Kyoto Japan
| | - Yukiho Ueda
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido‐cho, Matsugasaki, Sakyo‐ku 606‐8585 Kyoto Japan
| | - Yuri Sato
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido‐cho, Matsugasaki, Sakyo‐ku 606‐8585 Kyoto Japan
| | - Masashi Nakamura
- Morinomiya Center Osaka Research Institute of Industrial Science and Technology Morinomiya Center 1‐6–50 Morinomiya, Joto‐ku 536‐8553 Osaka Japan
| | - Koji Mitamura
- Morinomiya Center Osaka Research Institute of Industrial Science and Technology Morinomiya Center 1‐6–50 Morinomiya, Joto‐ku 536‐8553 Osaka Japan
| | - Seiji Watase
- Morinomiya Center Osaka Research Institute of Industrial Science and Technology Morinomiya Center 1‐6–50 Morinomiya, Joto‐ku 536‐8553 Osaka Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido‐cho, Matsugasaki, Sakyo‐ku 606‐8585 Kyoto Japan
- Materials Innovation Lab Kyoto Institute of Technology Goshokaido‐cho, Matsugasaki, Sakyo‐ku 606‐8585 Kyoto Japan
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19
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Hasebe R, Kaneko Y. Control of Crystalline-Amorphous Structures of Polyhedral Oligomeric Silsesquioxanes Containing Two Types of Ammonium Side-Chain Groups and Their Properties as Protic Ionic Liquids. Molecules 2019; 24:molecules24244553. [PMID: 31842433 PMCID: PMC6943538 DOI: 10.3390/molecules24244553] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 12/09/2019] [Accepted: 12/11/2019] [Indexed: 11/19/2022] Open
Abstract
Polyhedral oligomeric silsesquioxanes (POSSs), Am-POSS(x,y), prepared by hydrolytic condensation, contains two types of ammonium side-chain groups, where the numbering of x and y represents the type of ammonium ions in the POSS structure, corresponding to primary (1), secondary (2), tertiary (3), and quaternary (4) ammonium ions. Mixtures of the two starting materials selected from organotrialkoxysilanes containing primary, secondary, and tertiary amines and a quaternary ammonium salt [(RO)3Si(CH2)3R′, R = CH3 or CH2CH3, R′ = NH2, NHCH3, N(CH3)2, and N(CH3)3Cl] were dissolved in dimethyl sulfoxide (DMSO). The hydrolytic condensation was performed in the presence of bis(trifluoromethansulfonyl)imide (HNTf2) and water. All Am-POSS(x,y) structures consisted of a cage-type octamer (T8-POSS), as confirmed by 29Si NMR spectrometry and matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS). Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) analyses indicated that Am-POSS(1,3), Am-POSS(1,4), and Am-POSS(2,4) had amorphous structures. These POSSs have two or three differences in the number of methyl groups between the two types of ammonium side-chains. Conversely, Am-POSS(1,2), Am-POSS(2,3), and Am-POSS(3,4) had crystalline structures. The difference in the number of methyl groups between the two types of ammonium side-chains in these POSSs is only one. Therefore, the crystalline-amorphous structure of Am-POSS(x,y) is controlled by the side-chain group combinations. Furthermore, Am-POSS(1,3), Am-POSS(1,4), and Am-POSS(2,4) are protic ionic liquids with relatively low flow temperatures.
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20
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Imoto H, Ishida A, Hashimoto M, Mizoue Y, Yusa SI, Naka K. Soluble Network Polymers Based on Trifunctional Open-cage Silsesquioxanes. CHEM LETT 2019. [DOI: 10.1246/cl.190536] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- 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
| | - Ayano Ishida
- 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
| | - Mari Hashimoto
- 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
| | - Yoko Mizoue
- Department of Applied Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan
| | - Shin-ichi Yusa
- Department of Applied Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, 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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21
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Tanaka T, Hasegawa Y, Kawamori T, Kunthom R, Takeda N, Unno M. Synthesis of Double-Decker Silsesquioxanes from Substituted Difluorosilane. Organometallics 2019. [DOI: 10.1021/acs.organomet.8b00896] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Toru Tanaka
- Hitachi Chemical Company, Ltd., 48 Wadai, Tsukuba 300-4247, Japan
| | | | - Takashi Kawamori
- Hitachi Chemical Company, Ltd., 48 Wadai, Tsukuba 300-4247, Japan
| | - Rungthip Kunthom
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Nobuhiro Takeda
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
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22
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Katoh R, Imoto H, Naka K. One-pot strategy for synthesis of open-cage silsesquioxane monomers. Polym Chem 2019. [DOI: 10.1039/c9py00036d] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel synthetic strategy to access POSS monomers has been proposed; one reaction site of an open-cage POSS was capped, and the remaining two silanol groups were functionalized for polymerization. Importantly, the monomer can be obtained by one-pot synthesis without any troublesome isolation process.
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Affiliation(s)
- Ryoichi Katoh
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
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23
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Maeda D, Matsukawa K, Kusaka Y, Kaneko Y. Preparation of a soluble polysilsesquioxane containing a macrocyclic structure and capture of palladium ions. Polym J 2018. [DOI: 10.1038/s41428-018-0151-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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24
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Fujii S, Minami S, Urayama K, Suenaga Y, Naito H, Miyashita O, Imoto H, Naka K. Beads-on-String-Shaped Poly(azomethine) Applicable for Solution Processing of Bilayer Devices Using a Same Solvent. ACS Macro Lett 2018; 7:641-645. [PMID: 35632970 DOI: 10.1021/acsmacrolett.8b00271] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Solvent-based deposition techniques for fabrication of organic field-effect transistors (OFETs) generally require orthogonal solvents for deposition of a conjugated polymer layer on a polymer gate insulator layer. Here, we found significantly reduced dissolution rate of the polymeric film in the same solvent after casting a homegeneous polymerization solution of para-bis(3-aminopropyl)hexaisobutyl-substituted T8 cage (1) with terephthalaldehyde. The limited dissolution rate in the solvent provided enough chance for fabrication of a regioregular poly(3-hexylthiophene-2,5-diyl) (P3HT) layer on the present polymer films without using an orthogonal solvent. The rheological properties indicate that physical interaction between the polymer chains provides the significantly reduced dissolution rate after the deposition onto a substrate without any cross-linking treatments.
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Affiliation(s)
| | | | | | - Yu Suenaga
- Department of Physics and Electronics, Graduate School of Engineering, Osaka Prefecture University, Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Hiroyoshi Naito
- Department of Physics and Electronics, Graduate School of Engineering, Osaka Prefecture University, Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
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25
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26
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Imoto H, Katoh R, Naka K. Open-cage silsesquioxane necklace polymers having closed-cage silsesquioxane pendants. Polym Chem 2018. [DOI: 10.1039/c8py00758f] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A novel POSS monomer design has been proposed; a closed-cage POSS was tethered to an open-cage POSS, and the remaining two functional groups were employed for polymerization. The thermal and optical properties of the obtained main-chain type POSS polymers can be widely tuned by the substituents at the corners of the POSSs.
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Affiliation(s)
- Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Ryoichi Katoh
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
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27
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Katsuta N, Yoshimatsu M, Komori K, Natsuaki T, Suwa K, Sakai K, Matsuo T, Ohba T, Uemura S, Watanabe S, Kunitake M. Necklace-shaped dimethylsiloxane polymers bearing polyhedral oligomeric silsesquioxane cages with alternating length chains. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.08.049] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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28
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Ohshita J, Tsuchida T, Komaguchi K, Yamamoto K, Adachi Y, Ooyama Y, Harima Y, Tanaka K. Studies on Spherically Distributed LUMO and Electron-Accepting Properties of Caged Hexakis(germasesquioxanes). Organometallics 2017. [DOI: 10.1021/acs.organomet.6b00950] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joji Ohshita
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
| | - Toshiyuki Tsuchida
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
| | - Kenji Komaguchi
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
| | - Kazuki Yamamoto
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
| | - Yohei Adachi
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
| | - Yousuke Ooyama
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
| | - Yutaka Harima
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
| | - Kazuyoshi Tanaka
- Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4 Nishihiraki-cho, Takano, Sakyo-ku, Kyoto 606-8103, Japan
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29
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Zapico J, Shirai M, Sugiura R, Idota N, Fueno H, Tanaka K, Sugahara Y. Borophosphonate Cages as Element-blocks: Ab Initio Calculation of the Electronic Structure of a Simple Borophosphonate, [HPO3BH]4, and Synthesis of Two Novel Borophosphonate Cages with Polymerizable Groups. CHEM LETT 2017. [DOI: 10.1246/cl.160913] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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30
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Imoto H, Wada S, Naka K. Rh-catalyzed direct arylation of a polyhedral oligomeric silsesquioxane. Dalton Trans 2017; 46:6168-6171. [DOI: 10.1039/c7dt01106g] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Conjugation of a polyhedral oligomeric silsesquioxane (POSS) with the π-electrons of functional organic units has recently attracted much attention. This is the first example of catalytic direct arylation of a POSS.
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Affiliation(s)
- Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Satoshi Wada
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
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31
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Preparation and thermal properties of soluble polysilsesquioxanes containing hydrophobic side-chain groups and their hybridization with organic polymers. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.04.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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32
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Han SY, Wang XM, Shao Y, Guo QY, Li Y, Zhang WB. Janus POSS Based on Mixed [2:6] Octakis-Adduct Regioisomers. Chemistry 2016; 22:6397-403. [DOI: 10.1002/chem.201600579] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Shuai-Yuan Han
- Key Laboratory of Polymer Chemistry & Physics of the Ministry of Education; Center for Soft Matter Science and Engineering; College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 P.R. China
| | - Xiao-Man Wang
- Key Laboratory of Polymer Chemistry & Physics of the Ministry of Education; Center for Soft Matter Science and Engineering; College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 P.R. China
| | - Yu Shao
- Key Laboratory of Polymer Chemistry & Physics of the Ministry of Education; Center for Soft Matter Science and Engineering; College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 P.R. China
| | - Qing-Yun Guo
- Key Laboratory of Polymer Chemistry & Physics of the Ministry of Education; Center for Soft Matter Science and Engineering; College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 P.R. China
| | - Yiwen Li
- College of Polymer Science & Engineering; State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 P.R. China
| | - Wen-Bin Zhang
- Key Laboratory of Polymer Chemistry & Physics of the Ministry of Education; Center for Soft Matter Science and Engineering; College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 P.R. China
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33
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Sodkhomkhum R, Ervithayasuporn V. Synthesis of poly(siloxane/double-decker silsesquioxane) via dehydrocarbonative condensation reaction and its functionalization. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.01.044] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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34
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Liu N, Wei K, Wang L, Zheng S. Organic–inorganic polyimides with double decker silsesquioxane in the main chains. Polym Chem 2016. [DOI: 10.1039/c5py01827g] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this contribution, we report the synthesis of organic–inorganic polyimides with double decker silsesquioxane in the main chains with a novel and well-defined POSS diamine.
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Affiliation(s)
- Ning Liu
- Department of Polymer Science and Engineering and the State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
| | - Kun Wei
- Department of Polymer Science and Engineering and the State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
| | - Lei Wang
- Department of Polymer Science and Engineering and the State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
| | - Sixun Zheng
- Department of Polymer Science and Engineering and the State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
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35
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Maegawa T, Miyashita O, Irie Y, Imoto H, Naka K. Synthesis and properties of polyimides containing hexaisobutyl-substituted T8 cages in their main chains. RSC Adv 2016. [DOI: 10.1039/c6ra04860a] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We prepared two types of polyimides containing T8 cages in the main chains by polymerization of para-substituted bis(3-aminopropyl)hexaisobutyl-substituted T8 cage, and studied their mechanical, thermal, and optical properties.
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Affiliation(s)
- T. Maegawa
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - O. Miyashita
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Y. Irie
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - H. Imoto
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - K. Naka
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
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36
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Wang XM, Guo QY, Han SY, Wang JY, Han D, Fu Q, Zhang WB. Stochastic/Controlled Symmetry Breaking of the T8-POSS Cages toward Multifunctional Regioisomeric Nanobuilding Blocks. Chemistry 2015; 21:15246-55. [DOI: 10.1002/chem.201502125] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Indexed: 02/02/2023]
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37
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Imoto H, Nakao Y, Nishizawa N, Fujii S, Nakamura Y, Naka K. Tripodal polyhedral oligomeric silsesquioxanes as a novel class of three-dimensional emulsifiers. Polym J 2015. [DOI: 10.1038/pj.2015.38] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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38
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Tokunaga T, Koge S, Mizumo T, Ohshita J, Kaneko Y. Facile preparation of a soluble polymer containing polyhedral oligomeric silsesquioxane units in its main chain. Polym Chem 2015. [DOI: 10.1039/c5py00192g] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A soluble polymer containing polyhedral oligomeric silsesquioxane (POSS) units in its main chain was successfully prepared in one-step by hydrolytic condensation of a mixture of AEAPTMS and BTMSPA using the aqueous CF3SO3H.
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Affiliation(s)
- Takahiro Tokunaga
- Graduate School of Science and Engineering
- Kagoshima University
- Kagoshima 890-0065
- Japan
| | - Sayako Koge
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| | - Tomonobu Mizumo
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| | - Joji Ohshita
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| | - Yoshiro Kaneko
- Graduate School of Science and Engineering
- Kagoshima University
- Kagoshima 890-0065
- Japan
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39
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Maegawa T, Irie Y, Imoto H, Fueno H, Tanaka K, Naka K. para-Bisvinylhexaisobutyl-substituted T8 caged monomer: synthesis and hydrosilylation polymerization. Polym Chem 2015. [DOI: 10.1039/c5py01262g] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A para-substituted bisvinylhexaisobutyl-T8 caged monomer was successfully synthesized via a selective corner-opening reaction of the vinylheptaisobutyl-T8 cage and a subsequent corner-capping reaction.
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Affiliation(s)
- Takayuki Maegawa
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Yasuyuki Irie
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Hiroyuki Fueno
- Department of Molecular Engineering
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | | | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
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