1
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Ando H, Kodaki S, Takamura H, Kadota I, Tanaka K. A direct oxidative esterification of aldehydes with alcohols mediated by photochemical C-H bromination. Org Biomol Chem 2024. [PMID: 39239668 DOI: 10.1039/d4ob01237b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2024]
Abstract
The photochemical direct esterification of aldehydes with alcohols via in situ-generated acyl-bromides presented in this report is an attractive complementary addition to hitherto reported methods, as these are usually carried out in a two-step, one-pot procedure in order to avoid side reactions such as the oxidation of alcohols by halogen sources.
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Affiliation(s)
- Haru Ando
- Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-Naka, Kitaku, Okayama 700-8530, Japan.
| | - Sakura Kodaki
- Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-Naka, Kitaku, Okayama 700-8530, Japan.
| | - Hiroyoshi Takamura
- Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-Naka, Kitaku, Okayama 700-8530, Japan.
| | - Isao Kadota
- Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-Naka, Kitaku, Okayama 700-8530, Japan.
| | - Kenta Tanaka
- Research Institute for Interdisciplinary Science, Okayama University, 3-1-1 Tsushima-Naka, Kitaku, Okayama 700-8530, Japan.
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2
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Zentel R. LC‐Polymers and Smectic Phases with Special Substructures/Nanophase Segregation. MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202100216] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Rudolf Zentel
- Department of Chemistry Johannes Gutenberg University Mainz Duesbergweg 10–14 D‐55128 Mainz Germany
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3
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Yoshitake A, Kudo H, Matsumoto H, Tokita M. Persistent Water Repellency of Syndiotactic Polymethylene with Perfluoroethyl Hexyloxycarbonyl Side Chains. Macromol Rapid Commun 2021; 42:e2100311. [PMID: 34355439 DOI: 10.1002/marc.202100311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 07/07/2021] [Indexed: 01/24/2023]
Abstract
Polyacrylates bearing long fluoroalkyl (Rf) side chains are known to have ultralow surface energies that are appropriate for functional coating and fabric finishing. However, these long Rf chains cause health concerns because of the risk of toxic and bioaccumulative perfluoroalcanoic acid emission via oxidative degradation. This work demonstrates that incorporating a short Rf chain of perfluoroethylene at the end of the side chains of syndiotactic poly(substituted methylene) (PM) produces hydrophobicity. A contact angle of 105° of PM remains constant for more than 50 s, whereas that of the polyacrylate (PA) with the same side chain rapidly decreases from 85° to 44° over the same period. Such persistent water repellency of the PM is ascribed to a liquid crystal structure comprised the main chains arranged in a 2D hexagonal lattice and side chains that extend perpendicularly from these main chains.
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Affiliation(s)
- Ayano Yoshitake
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Hiroyuki Kudo
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Hidetoshi Matsumoto
- Department of Materials Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Masatoshi Tokita
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
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4
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Ishige R, Tanaka K, Ando S. Quantitative analysis of stereoscopic molecular orientations in thermally reactive and heterogeneous noncrystalline thin films via variable-temperature infrared pMAIRS and GI-XRD. Polym J 2021. [DOI: 10.1038/s41428-020-00458-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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5
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Zhang R, Li X, Ma H, Han L, Li C, Zhang S, Bai H, Li Y. Dependence of the liquid crystalline properties on the exactly controlled single-site functionalized density of mesogens focused on the alternating copolymer model. Polym Chem 2021. [DOI: 10.1039/d1py01310f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Fluorinated liquid crystal polymers (FLCPs) with an alternating sequence of mesogenic moieties within their backbones were precisely constructed.
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Affiliation(s)
- Ruixue Zhang
- State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Xuwen Li
- State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Hongwei Ma
- State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Li Han
- State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Chao Li
- State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Songbo Zhang
- State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Hongyuan Bai
- State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Yang Li
- State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
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6
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Ishige R. Precise structural analysis of polymer materials using synchrotron X-ray scattering and spectroscopic methods. Polym J 2020. [DOI: 10.1038/s41428-020-0357-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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7
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Qu T, Guan S, Zhang C, Zheng X, Zhao Y, Chen A. Liquid crystalline moiety-assisted perpendicular orientation of cylindrical domains within P4VP-b-PMA(Az) films with high aspect ratio. SOFT MATTER 2018; 14:7107-7112. [PMID: 30175354 DOI: 10.1039/c8sm01259h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Block copolymer (BCP) films with perpendicularly aligned cylindrical domains of high aspect ratio have important applications in diverse fields. However, an aspect ratio of the cylinders as high as 200 has rarely been reported so far. Here we demonstrate an efficient route to the formation of normally aligned P4VP cylinders with high aspect ratio surrounded by a matrix of azobenzene-containing block (PMA(Az)) via hierarchical self-assembly. A crisscross structure, consisting of parallelly aligned liquid crystalline (LC) layers and normally aligned self-assembly domains, is expected to assist the formation of well-defined nanostructures. The LC layers in the cylindrical films self-assemble to form smectic phase after solvent annealing, as confirmed by WAXD and UV-vis spectra. We found that the aspect ratio of the vertical P4VP cylinders is up to 200 and the film thickness reaches 6 μm. P4VP is a functional polymer, making this P4VP-b-PMA(Az) film more suitable for advanced filters, multi-nanochannels, nanolithography, and high-density storage media, etc.
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Affiliation(s)
- Ting Qu
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, P. R. China.
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8
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Heinz D, Amado E, Kressler J. Polyphilicity-An Extension of the Concept of Amphiphilicity in Polymers. Polymers (Basel) 2018; 10:E960. [PMID: 30960885 PMCID: PMC6403972 DOI: 10.3390/polym10090960] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 08/23/2018] [Accepted: 08/23/2018] [Indexed: 12/12/2022] Open
Abstract
Recent developments in synthetic pathways as simple reversible-deactivation radical polymerization (RDRP) techniques and quantitative post-polymerization reactions, most notoriously 'click' reactions, leading to segmented copolymers, have broadened the molecular architectures accessible to polymer chemists as a matter of routine. Segments can be blocks, grafted chains, branchings, telechelic end-groups, covalently attached nanoparticles, nanodomains in networks, even sequences of random copolymers, and so on. In this review, we describe the variety of the segmented synthetic copolymers landscape from the point of view of their chemical affinity, or synonymous philicity, in bulk or with their surroundings, such as solvents, permeant gases, and solid surfaces. We focus on recent contributions, current trends, and perspectives regarding polyphilic copolymers, which have, in addition to hydrophilic and lipophilic segments, other philicities, for example, towards solvents, fluorophilic entities, ions, silicones, metals, nanoparticles, and liquid crystalline moieties.
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Affiliation(s)
- Daniel Heinz
- Department of Chemistry, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany.
| | - Elkin Amado
- Department of Chemistry, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany.
| | - Jörg Kressler
- Department of Chemistry, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany.
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9
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Self-assembly of liquid-crystalline block copolymers in thin films: control of microdomain orientation. Polym J 2018. [DOI: 10.1038/s41428-018-0065-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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10
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Ogura Y, Takenaka M, Sawamoto M, Terashima T. Fluorous Gradient Copolymers via in-Situ Transesterification of a Perfluoromethacrylate in Tandem Living Radical Polymerization: Precision Synthesis and Physical Properties. Macromolecules 2018. [DOI: 10.1021/acs.macromol.7b02512] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Yusuke Ogura
- Department
of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Mikihito Takenaka
- Department
of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
- RIKEN SPring-8
Center, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Mitsuo Sawamoto
- Department
of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
- Institute
of Science and Technology Research, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
| | - Takaya Terashima
- Department
of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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11
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Lye DS, Xia Y, Wong MZ, Wang Y, Nieh MP, Weck M. ABC Supramolecular Triblock Copolymer by ROMP and ATRP. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00169] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Diane S. Lye
- Molecular
Design Institute and Department of Chemistry, New York University, New York, New York 10003, United States
| | - Yan Xia
- Department
of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
- Polymer
Program, Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269, United States
- Department
of Biomedical Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Madeleine Z. Wong
- Molecular
Design Institute and Department of Chemistry, New York University, New York, New York 10003, United States
| | - Yufeng Wang
- Department
of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
- Polymer
Program, Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269, United States
- Department
of Biomedical Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Mu-Ping Nieh
- Department
of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
- Polymer
Program, Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269, United States
- Department
of Biomedical Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Marcus Weck
- Molecular
Design Institute and Department of Chemistry, New York University, New York, New York 10003, United States
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