1
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Zou H, Zhao S, Wu Q, Chu B, Zhou L. One-Pot Synthesis, Circularly Polarized Luminescence, and Controlled Self-Assembly of Janus-Type Miktoarm Star Copolymers. ACS Macro Lett 2024:227-233. [PMID: 38300520 DOI: 10.1021/acsmacrolett.3c00703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024]
Abstract
With the aim of broadening the scope of Janus-type polymers with new functionalities, Janus-type miktoarm star copolymers comprising helical poly(phenyl isocyanide) (PPI) and a vinyl polymer were designed and synthesized via a combination of Pd(II)-initiated isocyanide polymerization and atom transfer radical polymerization (ATRP). A functional β-cyclodextrin bearing 7 Pd(II) complexes at one side and 14 bromine groups at the other side ((Pd(II))7-CD-(Br)14) was prepared and used as an initiator for the one-pot polymerization of phenyl isocyanide and the ATRP of vinyl monomers in a living and controlled manner. A variety of Janus-type copolymers with different structures and tunable compositions were facilely obtained by using this method. Thus, Janus-type copolymers composed of helical PPIs and tetraphenylethylene-modified vinyl polymers exhibited a significant circularly polarized luminescence performance in both soluble and aggregated states. Meanwhile, Janus-type copolymers containing PPIs and hydrophilic vinyl polymers presented amphiphilicity and self-assembled into diverse morphologies.
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Affiliation(s)
- Hui Zou
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, 230009 Anhui, China
| | - Shuyang Zhao
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, 230009 Anhui, China
| | - Qiliang Wu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, 230009 Anhui, China
| | - Benfa Chu
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, 23200 Anhui, China
| | - Li Zhou
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, 230009 Anhui, China
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2
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Li MC, Sato M, Chen FC, Chuang WT, Hirai T, Takahara A, Ho RM. Circular Polarization Luminescence of Groove Anchor Driving Optically Active Poly(methyl methacrylate) Stereocomplexes. ACS Macro Lett 2022; 11:1306-1311. [DOI: 10.1021/acsmacrolett.2c00529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ming-Chia Li
- Department of Biological Science and Technology, Center For Intelligent Drug Systems and Smart Bio-devices (IDS2B), National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan, China
| | - Masanao Sato
- Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka 819-0395, Japan
| | - Fa-Chung Chen
- Department of Biological Science and Technology, Center For Intelligent Drug Systems and Smart Bio-devices (IDS2B), National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan, China
| | - Wei-Tsung Chuang
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan, China
| | - Tomoyasu Hirai
- Department of Applied Chemistry, Osaka Institute of Technology, Osaka, 535-8585, Japan
| | - Atsushi Takahara
- Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka 819-0395, Japan
| | - Rong-Ming Ho
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, China
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3
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Kometani S, Kato T, Manabe K, Seko T, Chang Y, Luo H, Agata Y, Ohta N, Hayakawa T, Fujii S, Nakamura Y, Li M, Hirai T. Preferred‐handed
helical conformation in organic–inorganic hybrid block copolymers with
well‐controlled
stereoregularity. JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1002/pol.20210761] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Satoshi Kometani
- Department of Applied Chemistry, Faculty of Engineering and Graduate School of Engineering Osaka Institute of Technology Osaka Japan
| | - Tomoki Kato
- Department of Applied Chemistry, Faculty of Engineering and Graduate School of Engineering Osaka Institute of Technology Osaka Japan
| | - Kei Manabe
- Department of Applied Chemistry, Faculty of Engineering and Graduate School of Engineering Osaka Institute of Technology Osaka Japan
| | - Tamio Seko
- Department of Applied Chemistry, Faculty of Engineering and Graduate School of Engineering Osaka Institute of Technology Osaka Japan
| | - Yu‐Ning Chang
- Department of Biological Science and Technology Center for Intelligent Drug Systems and Smart Bio‐devices (IDS2B), National Yang Ming Chiao Tung University Hsinchu Taiwan
| | - Huai‐Rou Luo
- Department of Biological Science and Technology Center for Intelligent Drug Systems and Smart Bio‐devices (IDS2B), National Yang Ming Chiao Tung University Hsinchu Taiwan
| | - Yoshihiro Agata
- Department of Materials Science and Engineering School of Materials and Chemical Technology, Tokyo Institute of Technology Tokyo Japan
| | - Noboru Ohta
- Japan Synchrotron Radiation Research Institute Sayo Hyogo Japan
| | - Teruaki Hayakawa
- Department of Materials Science and Engineering School of Materials and Chemical Technology, Tokyo Institute of Technology Tokyo Japan
| | - Syuji Fujii
- Department of Applied Chemistry, Faculty of Engineering and Graduate School of Engineering Osaka Institute of Technology Osaka Japan
| | - Yoshinobu Nakamura
- Department of Applied Chemistry, Faculty of Engineering and Graduate School of Engineering Osaka Institute of Technology Osaka Japan
| | - Ming‐Chia Li
- Department of Biological Science and Technology Center for Intelligent Drug Systems and Smart Bio‐devices (IDS2B), National Yang Ming Chiao Tung University Hsinchu Taiwan
| | - Tomoyasu Hirai
- Department of Applied Chemistry, Faculty of Engineering and Graduate School of Engineering Osaka Institute of Technology Osaka Japan
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4
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Deng R, Wang C, Milton M, Tang D, Hollingsworth AD, Weck M. Side-chain functionalized supramolecular helical brush copolymers. Polym Chem 2021. [DOI: 10.1039/d1py00373a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The construction of a supramolecular brush copolymer featuring a helical backbone is described. The pendant chains are grafted onto the backbone through metal coordination.
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Affiliation(s)
- Ru Deng
- Department of Chemistry and Molecular Design Institute, New York University, New York, NY 10003, USA
| | - Chengyuan Wang
- Department of Chemistry and Molecular Design Institute, New York University, New York, NY 10003, USA
| | - Margarita Milton
- Department of Chemistry and Molecular Design Institute, New York University, New York, NY 10003, USA
| | - Danni Tang
- Department of Chemistry and Molecular Design Institute, New York University, New York, NY 10003, USA
| | - Andrew D. Hollingsworth
- Department of Physics and Center for Soft Matter Research, New York University, New York, NY 10003, USA
| | - Marcus Weck
- Department of Chemistry and Molecular Design Institute, New York University, New York, NY 10003, USA
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5
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Abstract
This review surveys recent progress towards robust chiral nanostructure fabrication techniques using synthetic helical polymers, the unique inferred properties that these materials possess, and their intricate connection to natural, biological chirality.
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Affiliation(s)
| | - James F. Reuther
- Department of Chemistry
- University of Massachusetts Lowell
- Lowell
- USA
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6
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Ikai T, Kawabata S, Mamiya F, Taura D, Ousaka N, Yashima E. Helix-Sense-Selective Encapsulation of Helical Poly(lactic acid)s within a Helical Cavity of Syndiotactic Poly(methyl methacrylate) with Helicity Memory. J Am Chem Soc 2020; 142:21913-21925. [PMID: 33315394 DOI: 10.1021/jacs.0c11204] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We report a highly enantio- and helix-sense-selective encapsulation of helical poly(lactic acid)s (PLAs) through a unique "helix-in-helix" superstructure formation within the helical cavity of syndiotactic poly(methyl methacrylate) (st-PMMA) with a one-handed helicity memory, which enables the separation of the enantiomeric helices of the left (M)- and right (P)-handed-PLAs. The M- and P-helical PLAs with different molar masses and a narrow molar mass distribution were prepared by the ring-opening living polymerization of the optically pure l- and d-lactides, respectively, followed by end-capping of the terminal residues of the PLAs with a 4-halobenzoate and then a C60 unit, giving the C60-free and C60-bound M- and P-PLAs. The C60-free and C60-bound M- and P-PLAs formed crystalline inclusion complexes with achiral st-PMMA accompanied by a preferred-handed helix induction in the st-PMMA backbone, thereby producing helix-in-helix superstructures with the same-handedness to each other. The induced helical st-PMMAs were retained after replacement with the achiral C60, indicating the memory of the induced helicity of the st-PMMAs. Both the C60-free and C60-bound helical PLAs were enantio- and helix-sense selectively encapsulated into the helical hollow space of the optically active M- and P-st-PMMAs with the helicity memory prepared using chiral amines. The M- and P-PLAs are preferentially encapsulated within the M- and P-st-PMMA helical cavity with the same-handedness to each other, respectively, independent of the terminal units. The C60-bound PLAs were more efficiently and enantioselectively trapped in the st-PMMA compared to the C60-free PLAs. The enantioselectivities were highly dependent on the molar mass of the C60-bound and C60-free PLAs and significantly increased as the molar mass of the PLAs increased.
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Affiliation(s)
- Tomoyuki Ikai
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Satoshi Kawabata
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Fumihiko Mamiya
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Daisuke Taura
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan.,Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Naoki Ousaka
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan.,Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Eiji Yashima
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan.,Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
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7
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Otozawa N, Yoshioka M, Ihara D, Hamajima R, Kato R, Terao T, Fukuma H, Kuretani S, Seko T, Fujii S, Nakamura Y, Kobayashi M, Takahara A, Hirai T. Anionic Polymerization of Methacrylate-functionalized Ionic Monomers in Ionic Liquid. CHEM LETT 2020. [DOI: 10.1246/cl.200546] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Nobuyuki Otozawa
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- AGC Inc., 1150 Hazawa-cho, Kanagawa-ku, Yokohama, Kanagawa 221-8755, Japan
| | - Masataka Yoshioka
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan
| | - Daiki Ihara
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Rio Hamajima
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan
| | - Raito Kato
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan
| | - Toshiki Terao
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan
| | - Hiroto Fukuma
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan
| | - Satoshi Kuretani
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan
| | - Tamio Seko
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan
| | - Syuji Fujii
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan
| | - Yoshinobu Nakamura
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan
| | - Motoyasu Kobayashi
- Department of Applied Chemistry, School of Advanced Engineering, Kogakuin Universtiy, 2665-1 Nakano-machi, Hachioji, Tokyo 192-0015, Japan
| | - Atsushi Takahara
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Tomoyasu Hirai
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan
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8
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Otozawa N, Hamajima R, Yoshioka M, Kato R, Tanaka A, Fukuma H, Terao T, Manabe K, Fujii S, Nakamura Y, Takahara A, Hirai T. Preparation of polymethyl methacrylate with
well‐controlled
stereoregularity by anionic polymerization in an ionic liquid solvent. JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1002/pol.20200244] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Nobuyuki Otozawa
- Institute for Materials Chemistry and EngineeringKyushu University Fukuoka Japan
- AGC Inc. Yokohama Kanagawa Japan
| | - Rio Hamajima
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of EngineeringOsaka Institute of Technology Osaka Japan
| | - Masataka Yoshioka
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of EngineeringOsaka Institute of Technology Osaka Japan
| | - Raito Kato
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of EngineeringOsaka Institute of Technology Osaka Japan
| | - Arisa Tanaka
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of EngineeringOsaka Institute of Technology Osaka Japan
| | - Hiroto Fukuma
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of EngineeringOsaka Institute of Technology Osaka Japan
| | - Toshiki Terao
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of EngineeringOsaka Institute of Technology Osaka Japan
| | - Kei Manabe
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of EngineeringOsaka Institute of Technology Osaka Japan
| | - Syuji Fujii
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of EngineeringOsaka Institute of Technology Osaka Japan
| | - Yoshinobu Nakamura
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of EngineeringOsaka Institute of Technology Osaka Japan
| | - Atsushi Takahara
- Institute for Materials Chemistry and EngineeringKyushu University Fukuoka Japan
| | - Tomoyasu Hirai
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of EngineeringOsaka Institute of Technology Osaka Japan
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9
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Mocny P, Klok HA. Complex polymer topologies and polymer—nanoparticle hybrid films prepared via surface-initiated controlled radical polymerization. Prog Polym Sci 2020. [DOI: 10.1016/j.progpolymsci.2019.101185] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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10
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Zeng X, Zhang S, Zheng N, Yu S, Li X, Ageishi M, Lotz B, Liu G, Cao Y. Diversified α-phase nanostructure of isotactic polypropylene under cylindrical confinement via cross diffraction analysis. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121647] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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Yu S, Lai Z, Jinnai H, Zeng X, Ageishi M, Lotz B, Cheng SZD, Zheng N, Zhang S, Feng X, Cao Y. Adding Symmetry: Cylindrically Confined Crystallization of Nylon-6. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02672] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Shichen Yu
- Institute for Advanced Study, Shenzhen University, Guangdong 518060, China
| | - Ziwei Lai
- Institute for Advanced Study, Shenzhen University, Guangdong 518060, China
| | - Hiroshi Jinnai
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai 980-8577, Japan
| | - Xingming Zeng
- Institute for Advanced Study, Shenzhen University, Guangdong 518060, China
| | - Masaki Ageishi
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai 980-8577, Japan
| | - Bernard Lotz
- Institut Charles Sadron (CNRS—ULP), 6, rue Boussingault, Strasbourg 67083, France
| | - Stephen Z. D. Cheng
- Advanced Institute for Soft Matter Science and Technology (AISMST), South China University of Technology, Guangdong 510640, China
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Nan Zheng
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangdong 513060, China
| | - Shuailin Zhang
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Xueyan Feng
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Yan Cao
- Institute for Advanced Study, Shenzhen University, Guangdong 518060, China
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12
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Zuo B, Bai L, Li Z, Xu H, Li Y, Wang X. A Nanoconfinement Effect Imposed by the Limited End-to-End Distance of the Grafted Chains on a Molecular Aggregation of Polymer Brushes with Crystalline Side Groups. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b02049] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Biao Zuo
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Lu Bai
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Zhiying Li
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Hao Xu
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Yun Li
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Xinping Wang
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
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13
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Yu Q, Wang R. Effect of Chain Rigidity on the Crystallization of DNA-Directed Nanoparticle System. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01767] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Qiuyan Yu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Key Laboratory of High Performance Polymer Material and Technology of Ministry of Education, State Key Laboratory of Coordination Chemistry and Collaborative Innovation Center of Chemistry for Life Sciences, Nanjing University, Nanjing 210023, China
| | - Rong Wang
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Key Laboratory of High Performance Polymer Material and Technology of Ministry of Education, State Key Laboratory of Coordination Chemistry and Collaborative Innovation Center of Chemistry for Life Sciences, Nanjing University, Nanjing 210023, China
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14
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Hirai T, Sato M, Kato T, Shimamoto H, Uno K, Otozawa N, Takahara A. Preparation of polymer brushes with well-controlled stereoregularity and evaluation of their functional properties. Polym J 2018. [DOI: 10.1038/s41428-018-0078-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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15
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Kato T, Sato M, Shimamoto H, Uno K, Yokomachi K, Konishi Y, Kamitani K, Nishibori M, Ohta N, Ishige R, White KL, Otozawa N, Hirai T, Takahara A. Preparation of High-Density Polymer Brushes with a Multihelical Structure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:3283-3288. [PMID: 29442517 DOI: 10.1021/acs.langmuir.7b04167] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
It is well-known that a mixture of isotactic and syndiotactic polymethyl methacrylate (PMMA) forms a stereocomplex consisting of a multihelical structure in which an isotactic chain is surrounded by a syndiotactic chain. Here, we report the basic structure of the stereocomplex formed when the syndiotactic PMMA chains are tethered to a silicon substrate and form a high-density polymer brush. The influence of geometric confinement was investigated by preparing the high-density polymer brushes on a flat and spherical substrate. In both cases, mixing the untethered isotactic PMMA with the grafted syndiotactic PMMA led to the formation of a stereocomplex with a multihelical structure. Static contact angle measurements showed a hindered surface mobility at the outermost surface of the polymer brush, indicating that the stereocomplex forms a crystalline structure. A syndiotactic polymer brush with substituted fluoroalkyl groups was prepared to increase the contrast for grazing incidence wide-angle X-ray diffraction (GIWAXD) measurements. The GIWAXD results verified that the stereocomplex forms a crystalline structure oriented perpendicular to the substrate with a relatively low degree of orientation.
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Affiliation(s)
| | | | | | | | | | | | | | - Maiko Nishibori
- Faculty of Energy and Material Sciences , Kyushu University , 6-1 Kasugakoen , Kasuga , Fukuoka 816-8580 , Japan
| | - Noboru Ohta
- Japan Synchrotron Radiation Research Institute/SPring-8 , Sayo , Hyogo 679-5198 , Japan
| | - Ryohei Ishige
- Department of Chemical Science and Engineering , Tokyo Institute of Technology , 2-12-1 O-okayama Meguro-ku, Tokyo 152-8552 , Japan
| | | | - Nobuyuki Otozawa
- Asahi Glass Co., Ltd. , 1150 Hazawa-cho , Kanagawa-ku Yokohama-shi , Kanagawa 221-8755 , Japan
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