1
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Kawakami C, Hara M, Nagano S, Shimomoto H, Yorimoto Y, Yamada T, Oda S, Ihara E, Seki T. Assembly Structure Formation in Bulk and Ultrathin Films of Poly(substituted methylene) Having an Azobenzene Side Chain. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:11297-11306. [PMID: 38755745 DOI: 10.1021/acs.langmuir.4c01168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
The density of the side chain introduced to a polymer main chain greatly influences the properties and functions of the polymer. This work first reports on the packing structure and properties at an interface of a poly(substituted methylene) where an azobenzene side chain is introduced at every carbon atom in the main chain (C1PAz). The structure and properties are compared with those of a conventional vinyl polymer [poly(methacrylate)] possessing an identical side-chain structure (C2PAz). The packing structure in the bulk state analyzed by X-ray measurements revealed that C1PAz adopts a highly ordered rectangular unit cell structure, whereas C2PAz shows a less ordered lamellar one. Langmuir film balance experiments indicated that both polymers with the trans-azobenzene give essentially the identical 2D side-chain occupying area on water, which agrees well with the smectic B (hexatic packing) model based on the X-ray data. Upon transfer onto a solid substrate, only C1PAz shows a conformational transformation to a spread bilayer-type layer, most probably due to conformational frustration stemming from the crowding of the side chains. This study proposes new insights into the effects of side-chain density on the self-assembly and photoreaction of azobenzene-containing polymers, which are expected to expand the possibilities of polymer design for various applications.
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Affiliation(s)
- Chikara Kawakami
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Mitsuo Hara
- Faculty of Engineering and Design, Kagawa University, 2217-20, Hayashi-cho, Takamatsu 761-0396, Japan
| | - Shusaku Nagano
- Department of Chemistry, Rikkyo University, 3-34-1, Nishiikebukuro, Toyoshima-ku, Tokyo 171-8501, Japan
| | - Hiroaki Shimomoto
- Department of Applied Chemistry, Graduate School of Science and Engineering, Ehime University, 3 Bunko-cho, Matsuyama, Ehime 790-8577, Japan
| | - Yoshitaka Yorimoto
- Department of Applied Chemistry, Graduate School of Science and Engineering, Ehime University, 3 Bunko-cho, Matsuyama, Ehime 790-8577, Japan
| | - Tomohiro Yamada
- Department of Applied Chemistry, Graduate School of Science and Engineering, Ehime University, 3 Bunko-cho, Matsuyama, Ehime 790-8577, Japan
| | - Shuichiro Oda
- Department of Applied Chemistry, Graduate School of Science and Engineering, Ehime University, 3 Bunko-cho, Matsuyama, Ehime 790-8577, Japan
| | - Eiji Ihara
- Department of Applied Chemistry, Graduate School of Science and Engineering, Ehime University, 3 Bunko-cho, Matsuyama, Ehime 790-8577, Japan
| | - Takahiro Seki
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
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2
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Li F, Xiao L, Li B, Hu X, Liu L. Carbene polymerization from the catalyzed decomposition of diazo compounds: Mechanism and modern development. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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3
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Suzuki Y, Kano T, Tomii T, Tsuji N, Matsumoto A. Relaxation and Amorphous Structure of Polymers Containing Rigid Fumarate Segments. Polymers (Basel) 2022; 14:polym14224876. [PMID: 36433003 PMCID: PMC9692691 DOI: 10.3390/polym14224876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/08/2022] [Accepted: 11/09/2022] [Indexed: 11/16/2022] Open
Abstract
The physical properties of polymers are significantly affected by relaxation processes. Recently, we reported that poly(diethyl fumarate) (PDEF) shows two thermal anomalies on DSC measurement, despite the fact that it is a homopolymer. We attribute these two relaxations α relaxation and β relaxation, respectively. In this study, we investigate the two relaxations of fumarate-containing polymers by DSC, solid-state NMR, and X-ray scattering. The two relaxations are present even in a copolymer of diethyl fumarate and ethyl acrylate with fumarate segments of 30%. We used poly(methyl methacrylate) (PMMA) as a model polymer for comparison, since there are detailed investigations of its dynamics and physical properties. Solid-state NMR indicates that the very local relaxation of poly(fumarate)s is not significantly different from that of PMMA. The tensile test showed that PDEF is still brittle at above β relaxation temperature and below α relaxation temperature. It was revealed that a structural anisotropy appeared when PDEF was extended at around α relaxation temperature. We discuss the effect of the glassy packing of the rigid polymer chain including the DEF segments on the strong β relaxation behavior. Our data provide insight into the microscopic mechanism of β relaxation of vinyl polymers.
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Affiliation(s)
- Yasuhito Suzuki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai 599-8531, Osaka, Japan
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai 599-8531, Osaka, Japan
- Correspondence: (Y.S.); (A.M.)
| | - Takahito Kano
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai 599-8531, Osaka, Japan
| | - Tsuyoshi Tomii
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai 599-8531, Osaka, Japan
| | - Nagisa Tsuji
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai 599-8531, Osaka, Japan
| | - Akikazu Matsumoto
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai 599-8531, Osaka, Japan
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai 599-8531, Osaka, Japan
- Correspondence: (Y.S.); (A.M.)
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4
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Shimomoto H, Hayashi H, Aramasu K, Itoh T, Ihara E. Polymerization of Diazoacetates Initiated by the Pd( N-arylmaleimide)/NaBPh 4 System: Maleimide Insertion into a Pd–C Bond Preceding to Initiation Leading to Efficient α-Chain-End Functionalization of Poly(alkoxycarbonylmethylene)s. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00508] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hiroaki Shimomoto
- Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama 790-8577, Japan
| | - Hinano Hayashi
- Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama 790-8577, Japan
| | - Kyoka Aramasu
- Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama 790-8577, Japan
| | - Tomomichi Itoh
- Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama 790-8577, Japan
| | - Eiji Ihara
- Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama 790-8577, Japan
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5
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Gao BR, Wu YJ, Xu L, Zou H, Zhou L, Liu N, Wu ZQ. Synthesis of Optically Active Helical Polycarbenes through Helix-Sense-Selective Polymerization Strategy and Their Application in Chiral Separation. ACS Macro Lett 2022; 11:785-791. [PMID: 35653295 DOI: 10.1021/acsmacrolett.2c00212] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
In this work, helical polycarbenes with optical activity were designed and facilely synthesized through the helix-sense-selective polymerization (HSSP) of the diazoacetate monomer with a dimethylbenzyl ester pendant catalyzed by π-allylPdCl with chiral phosphine ligands at room temperature. The polymerization was carried out in a living and controlled style, and a range of helical polycarbenes with the desired number-average molecular weights and narrow molecular weight distributions were obtained. Circular dichroism and UV-vis analyses revealed that these polycarbenes exhibited a stable helical conformation with a preferred handedness, and their helical directions were dependent on the chirality of the chiral phosphine ligands. Further studies showed that the helical conformation of the obtained polycarbenes was from the polymeric backbone rather than the intermolecular aggregation in the solutions. Moreover, the prepared, optically active, helical polycarbenes possessed excellent enantioselective crystallization ability for threonine racemates. The enantiomeric excess (e.e.) of the induced crystals could be up to 83% via utilizing the prepared helical polycarbenes as a chiral separation agent.
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Affiliation(s)
- Bao-Rui Gao
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei 230009, Anhui Province, China
| | - Yong-Jie Wu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei 230009, Anhui Province, China
| | - Lei Xu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei 230009, Anhui Province, China
| | - Hui Zou
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei 230009, Anhui Province, China
| | - Li Zhou
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei 230009, Anhui Province, China
| | - Na Liu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei 230009, Anhui Province, China
| | - Zong-Quan Wu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei 230009, Anhui Province, China
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
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6
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Zhou L, Xu L, Song X, Kang SM, Liu N, Wu ZQ. Nickel(II)-catalyzed living polymerization of diazoacetates toward polycarbene homopolymer and polythiophene-block-polycarbene copolymers. Nat Commun 2022; 13:811. [PMID: 35145107 PMCID: PMC8831484 DOI: 10.1038/s41467-022-28475-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 01/17/2022] [Indexed: 01/27/2023] Open
Abstract
Diazoacetate polymerization has attracted considerable research attention because it is an effective approach for fabricating carbon-carbon (C-C) main chain polymers. However, diazoacetate polymerization based on inexpensive catalysts has been a long-standing challenge. Herein, we report a Ni(II) catalyst that can promote the living polymerization of various diazoacetates, yielding well-defined C-C main chain polymers, polycarbenes, with a predictable molecular weight (Mn) and low dispersity (Mw/Mn). Moreover, the Ni(II)-catalyzed sequential living polymerization of thiophene and diazoacetate monomers affords interesting π-conjugated poly(3-hexylthiophene)-block-polycarbene copolymers in high yields with a controlled Mn, variable compositions, and low Mw/Mn, although the structure and polymerization mechanism of the two monomers differ. Using this strategy, amphiphilic block copolymers comprising hydrophobic poly(3-hexylthiophene) and hydrophilic polycarbene blocks are facilely prepared, which were self-assembled into well-defined supramolecular architectures with tunable photoluminescence.
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Affiliation(s)
- Li Zhou
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei, 230009, Anhui Province, China
| | - Lei Xu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei, 230009, Anhui Province, China
| | - Xue Song
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei, 230009, Anhui Province, China
| | - Shu-Ming Kang
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei, 230009, Anhui Province, China
| | - Na Liu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei, 230009, Anhui Province, China
| | - Zong-Quan Wu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei, 230009, Anhui Province, China.
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7
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Wang YC, Shao YJ, Liou GS, Nagao S, Makino Y, Akiyama E, Kato M, Shimomoto H, Ihara E. Synthesis and electrochromic properties of polyamines containing a 4,4′-diaminotriphenylamine- N, N′-diyl unit in the polymer backbone: Ru-catalyzed N–H insertion polycondensation of 1,4-phenylenebis(diazoacetate) with 4,4′-diaminotriphenylamine derivatives. Polym Chem 2022. [DOI: 10.1039/d2py01118b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Polycondensation of a bis(diazocarbonyl) compound and diaminotriphenylamine derivatization via Ru-catalyzed N–H insertion to afford electroactive polyamine.
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Affiliation(s)
- Yun-Chi Wang
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Yu-Jen Shao
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Guey-Sheng Liou
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Sota Nagao
- Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama 790-8577, Japan
| | - Yusuke Makino
- Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama 790-8577, Japan
| | - Eita Akiyama
- Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama 790-8577, Japan
| | - Masaaki Kato
- Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama 790-8577, Japan
| | - Hiroaki Shimomoto
- Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama 790-8577, Japan
| | - Eiji Ihara
- Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama 790-8577, Japan
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8
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Zhou L, Gao RT, Zhang XJ, He K, Xu L, Liu N, Wu ZQ. A Versatile Method for the End-Functionalization of Polycarbenes. Macromol Rapid Commun 2021; 43:e2100630. [PMID: 34791733 DOI: 10.1002/marc.202100630] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 11/06/2021] [Indexed: 12/25/2022]
Abstract
End-functionalization is an effective strategy for constructing functional materials. A method for chain-end functionalization of helical polycarbenes is herein developed that relied on Sonogashira coupling reaction. In this work, a family of helical polycarbenes with controlled molecular mass (Mn ) and low polydispersity (Mw /Mn ) is readily prepared using Pd(II) and the Wei-Phos ligand as initiator. The Pd(II) complex is confirmed to remain at the chain end of polycarbene. Subsequently, a series of terminal alkyne derivatives with interesting functional groups, including the F atom, aldehyde, or anthracene groups, are synthesized. They could be installed at the chain end of polycarbene through Sonogashira coupling reaction catalyzed by the Pd(II) complex at the chain end. Moreover, a couple of hybrid block copolymers are easily obtained by installing terminal alkynes modified by another type of polymer. The structures of the isolated polymers are confirmed by 1 H nuclear magnetic resonance (1 H NMR), 19 F nuclear magnetic resonance (19 F NMR), 31 P nuclear magnetic resonance (31 P NMR), and Fourier transform infrared spectroscopy (FT-IR), respectively. The self-assembly properties of the hybrid block copolymers are also investigated by atomic force spectroscopy analysis. By the hereby developed method, various functional groups can be introduced at the chain end of helical polycarbenes for constructing functional polymer materials, moreover, the transition metal residues at the end of polymer chains can be easily removed.
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Affiliation(s)
- Li Zhou
- Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Department of Polymer Science and Engineering, Hefei University of Technology, Hefei, Anhui Province, 230009, China
| | - Run-Tan Gao
- Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Department of Polymer Science and Engineering, Hefei University of Technology, Hefei, Anhui Province, 230009, China
| | - Xin-Jie Zhang
- Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Department of Polymer Science and Engineering, Hefei University of Technology, Hefei, Anhui Province, 230009, China
| | - Kai He
- Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Department of Polymer Science and Engineering, Hefei University of Technology, Hefei, Anhui Province, 230009, China
| | - Lei Xu
- Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Department of Polymer Science and Engineering, Hefei University of Technology, Hefei, Anhui Province, 230009, China
| | - Na Liu
- Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Department of Polymer Science and Engineering, Hefei University of Technology, Hefei, Anhui Province, 230009, China
| | - Zong-Quan Wu
- Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Department of Polymer Science and Engineering, Hefei University of Technology, Hefei, Anhui Province, 230009, China
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9
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Yao XQ, Wang YS, Wang J. Cp(π-Allyl)Pd-Initiated Polymerization of Diazoacetates: Reaction Development, Kinetic Study, and Chain Transfer with Alcohols. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01966] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xing-Qi Yao
- Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Yi-Song Wang
- Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Jianbo Wang
- Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
- State Key Laboratory of Organometallic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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10
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Helical Polycarbenes Bearing D-Prolinol Ester Pendants: An Efficient Catalyst for Asymmetric Michael Addition Reaction. Catalysts 2021. [DOI: 10.3390/catal11111369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A novel diazoacetate monomer (1) carrying tert-butyloxycarboryl (Boc) protected D-prolinol ester was designed and synthesized successfully. Molecular weight-controlled polymerization of 1 using the complex of π-allylPdCl coordinated Wei-phos (LR) ligand gives a series of helical polycarbenes (poly-1ms) with well-defined molecular weights (Mns) and low polydispersity (Mw/Mns). Removing the protecting Boc groups on the D-prolinol ester pendants leads to the formation of helical poly-1m-As, which showed high optical activity. Furthermore, the poly-1m-As showed high catalytic ability on asymmetric Michael addition reaction (up to 76% ee and 94/6 dr). Both the enantioselectivity and diastereoselectivity of the Michael addition reaction were increased comparing to D-prolinol as catalyst. Moreover, the helical polycarbene catalyst can be easily recovered and reused at least four times without significant loss of its enantioselectivity and diastereoselectivity.
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11
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Suzuki Y, Tsuji N, Miyata K, Kano T, Fukao K, Matsumoto A. Characteristic Features of
α
and
β
Relaxations of Poly(diethyl fumarate) as the Poly(substituted methylene). MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202100124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Yasuhito Suzuki
- Department of Applied Chemistry, Graduate School of Engineering Osaka Prefecture University 1‐1 Gakuen‐cho, Naka‐ku Sakai Osaka 599‐8531 Japan
| | - Nagisa Tsuji
- Department of Applied Chemistry, Graduate School of Engineering Osaka Prefecture University 1‐1 Gakuen‐cho, Naka‐ku Sakai Osaka 599‐8531 Japan
| | - Kairi Miyata
- Department of Physics Ritsumeikan University 1‐1‐1 Noji‐higashi Kusatsu Shiga 525‐8577 Japan
| | - Takahito Kano
- Department of Applied Chemistry, Graduate School of Engineering Osaka Prefecture University 1‐1 Gakuen‐cho, Naka‐ku Sakai Osaka 599‐8531 Japan
| | - Koji Fukao
- Department of Physics Ritsumeikan University 1‐1‐1 Noji‐higashi Kusatsu Shiga 525‐8577 Japan
| | - Akikazu Matsumoto
- Department of Applied Chemistry, Graduate School of Engineering Osaka Prefecture University 1‐1 Gakuen‐cho, Naka‐ku Sakai Osaka 599‐8531 Japan
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12
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Shimomoto H, Tsunematsu S, Itoh T, Ihara E. Reactivity of poly(alkoxycarbonylmethylene)s under basic conditions: alkylation of main chain carbon atoms via a ketene silyl acetal-type intermediate and cleavage of the carbon–carbon main chain. Polym Chem 2021. [DOI: 10.1039/d0py01486a] [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 report the alkylation of main chain carbon atoms and cleavage of the carbon–carbon main chain of poly(alkoxycarbonylmethylene)s.
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Affiliation(s)
- Hiroaki Shimomoto
- Department of Materials Science and Biotechnology
- Graduate School of Science and Engineering
- Ehime University
- Japan
| | - Shogo Tsunematsu
- Department of Materials Science and Biotechnology
- Graduate School of Science and Engineering
- Ehime University
- Japan
| | - Tomomichi Itoh
- Department of Materials Science and Biotechnology
- Graduate School of Science and Engineering
- Ehime University
- Japan
| | - Eiji Ihara
- Department of Materials Science and Biotechnology
- Graduate School of Science and Engineering
- Ehime University
- Japan
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