1
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Steinbrecher R, Zhang P, Papadakis CM, Müller-Buschbaum P, Taubert A, Laschewsky A. Boosting the photo-switchability of double-responsive water-soluble polymers by incorporating arylazopyrazole dyes. Chem Commun (Camb) 2024; 60:1747-1750. [PMID: 38247444 DOI: 10.1039/d3cc06178g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
Dual thermo- and light-responsive water-soluble copolymers that respond to exclusively non-invasive triggers are obtained by functionalising poly(N,N-dimethylacrylamide) with arylazopyrazole side chains. The light-induced E-Z (trans-Z) photo isomerisation of these dyes provides an exceptionally effective photo-switch, which can reversibly shift the LCST-type phase transition temperatures by almost 25 K.
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Affiliation(s)
- René Steinbrecher
- Institute of Chemistry, University of Potsdam, Potsdam-Golm, Germany.
| | - Peiran Zhang
- Physics Department, TUM School of Natural Sciences, Technical University of Munich, Garching, Germany
| | - Christine M Papadakis
- Physics Department, TUM School of Natural Sciences, Technical University of Munich, Garching, Germany
| | - Peter Müller-Buschbaum
- Physics Department, TUM School of Natural Sciences, Technical University of Munich, Garching, Germany
- Heinz Maier-Leibnitz Zentrum (MLZ), Technical University of Munich, Garching, Germany
| | - Andreas Taubert
- Institute of Chemistry, University of Potsdam, Potsdam-Golm, Germany.
| | - André Laschewsky
- Institute of Chemistry, University of Potsdam, Potsdam-Golm, Germany.
- Fraunhofer Institute for Applied Polymer Research IAP, Potsdam-Golm, Germany
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2
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Controlling the LCST-Phase Transition in Azobenzene-Functionalized Poly ( N-Isopropylacrlyamide) Hydrogels by Light. Gels 2023; 9:gels9020075. [PMID: 36826244 PMCID: PMC9956105 DOI: 10.3390/gels9020075] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/09/2023] [Accepted: 01/13/2023] [Indexed: 01/19/2023] Open
Abstract
Poly(N-isopropylacrylamide) PNIPAAm hydrogels were modified with a new azobenzene-containing co-monomer. In this work, light responsiveness as an additional functionality, is conceptualized to induce two phase transitions in the same material, which can be controlled by light. For a hydrogel with merely 2.5 mol% of this co-monomer, the lower critical solution transition temperature (LCST) was lowered by 12 °C (to 20 °C) compared to PNIPAAm (LCST at 32 °C), as analyzed by differential scanning calorimetry (DSC). The untreated unimodal endotherm split into a bimodal peak upon irradiation with UV-light, giving a second onset due to the switched (Z) isomer-rich regions, LCST*H2.5%-(Z) = 26 °C. On irradiation with 450 nm, leading to the reverse (Z) to (E) isomerization, the endotherm was also reversible. Thus, a photo-switchable hydrogel whose LCST and structure are tunable with the hydrophobicity-hydrophilicity of the (E) and (Z) isomeric state of azobenzene was obtained. The influence of the increase in the mol% of azoacrylate on the LCST was evaluated via DSC, in combination with NMR studies, UV-vis spectroscopy and control experiments with linear polymers. The large light-driven modulation of the LCST adds bistability in thermoresponsive hydrogels, which may open diverse applications in the field of soft robotics actuators.
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3
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Takebuchi H, Jin RH. Photoluminescent polymer micelles with thermo-/pH-/metal responsibility and their features in selective optical sensing of Pd(ii) cations. RSC Adv 2022; 12:5720-5731. [PMID: 35425587 PMCID: PMC8981652 DOI: 10.1039/d1ra08756h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 01/31/2022] [Indexed: 01/27/2023] Open
Abstract
Photoluminescent polymers can be divided into two types of structures: one is the well-known conventional π-conjugated rigid chain polymers bearing π-conjugated chromophores in their side chains, and the other is the common flexible polymers without π-conjugated chromophores in their main or side chains but with a feature of clustering electron-rich and/or dipole groups in their main and/or side chains. In this work, we found a new photoluminescent polymer comprising theophylline (T) and imidazole (I) residues in a suitable ratio in the side chains on the common polystyrenic block (PVB-T/I). We synthesized a block copolymer (denoted as P2) consisting of hydrophobic PVB-T/I and hydrophilic poly(N-isopropylacrylamide), and we investigated its self-assembly into micelles and their micellar features, such as thermo-responsibility, fluorescence emission, pH, and metal ion-dependent photoluminescence, in detail. Especially, the micelles self-assembled from P2 showed intrinsic blue emission which was emitted from the charge transfer association between T and I residues in the intra-chains. Weakening the association by adjustment of the pH or addition of metal ions could evidently reduce the photoluminescence in the micellar state. Very interestingly, among many metal cations, only Pd2+, which can chelate strongly with theophylline, strongly quenched the photoluminescence from the micelles. Therefore, the polymer micelles functioned as an optical sensor for Pd(ii) ion not only by spectroscopy but also with the naked eye.
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Affiliation(s)
- Haruka Takebuchi
- Department of Material and Life Chemistry, Kanagawa University 3-2-7 Rokkakubashi Yokohama 221-8686 Japan
| | - Ren-Hua Jin
- Department of Material and Life Chemistry, Kanagawa University 3-2-7 Rokkakubashi Yokohama 221-8686 Japan
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4
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Wei S, Zhang Z, Dong W, Liang T, Ji J, Tian W, Tan S, Zhao Q, Wang C, Wu Y. Specific Ion Effects of Azobenzene Salts on Photoresponse of PNIPAm in Aqueous Solutions. Macromol Rapid Commun 2021; 42:e2100232. [PMID: 34121263 DOI: 10.1002/marc.202100232] [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: 04/13/2021] [Revised: 05/13/2021] [Indexed: 01/12/2023]
Abstract
Ionic species are important to dominate phase separation behaviors of poly(N-isopropylacrylamide) (PNIPAm) in aqueous solutions. Herein, photoresponsive azobenzene-based salts with various ions are prepared and their photoresponsive ion effects on clouding temperatures (TcpS ) of PNIPAm in aqueous solutions are explored. It is found that, despite of various structures of anions and cations, trans-TcpS under vis light irradiation are always higher than cis-TcpS under UV irradiation. Particularly, Hofmeister effect of anions on TcpS is roughly observed. For example, azobenzene with kosmotropic CO3 2- gives the lowest cis-Tcp while in use of typical chaotropic anions, such as ClO4 - , azobenzene isomerization less affects values of Tcp s. In another hand, azobenzene-based metallic salts containing lithium, sodium, and potassium cations also demonstrate photoresponsive Hofmeister effect. Trans-metallic azobenzene demonstrates a chaotropic effect on Tcp s while UV induces kosmotropic behaviors on TcpS . Additionally, ionic conduction of the solution along with photoresponsive phase separations is also investigated and PNIPAm aggregations induce a sharp reduction of ion conduction during UV light illumination.
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Affiliation(s)
- Shuang Wei
- College of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China
| | - Zechuan Zhang
- College of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China
| | - Weibin Dong
- College of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China
| | - Ting Liang
- School of Chemistry and Environment, Southwest Minzu University, No. 16 South Section 4, Yihuan Road, Chengdu, Sichuan, 610041, China
| | - Junyi Ji
- College of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China
| | - Wen Tian
- College of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China
| | - Shuai Tan
- College of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China
| | - Qiang Zhao
- College of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China
| | - Caihong Wang
- College of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China
| | - Yong Wu
- College of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China
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5
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Li P, Tan S, Wu Y, Wang C, Watanabe M. Azobenzene-Based Ionic Liquid Switches Phase Separation of Poly( N-isopropylacrylamide) Aqueous Solutions as a Molecular Trigger, Leading to UV Shutdown of Ionic Transport. ACS Macro Lett 2020; 9:825-829. [PMID: 35648533 DOI: 10.1021/acsmacrolett.0c00170] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This paper presents a light-switchable phase separation of poly(N-isopropylacrylamide) (PNIPAm) in aqueous solutions using an azobenzene-based ionic liquid as a molecular trigger. A different UV response was obtained with use of an azobenzene molecular trigger. A UV-induced aggregation of PNIPAm was observed in the current system, which is opposite to that reported for azobenzene-functionalized PNIPAm systems. According to in situ FT-IR, cis-isomers destabilized the hydrogen bonding between water and PNIPAm, contributing to a light-induced aggregation of PNIPAm. This polarity effect was quite similar to salting effects of hofmeister anions on clouding points. Furthermore, a UV shutdown of ion transport of the azobenzene-based ionic liquid was demonstrated with a significant reduction factor of 0.03 at ambient temperature, which can be potentially applied in biotechnology, optoelectronics, and ionic circuits.
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Affiliation(s)
- Peiqi Li
- Department of Chemical Machinery and Control Engineering, School of Chemical Engineering, Sichuan University, Sichuan 610065, China
| | - Shuai Tan
- Department of Chemical Machinery and Control Engineering, School of Chemical Engineering, Sichuan University, Sichuan 610065, China
| | - Yong Wu
- Department of Chemical Machinery and Control Engineering, School of Chemical Engineering, Sichuan University, Sichuan 610065, China
| | - Caihong Wang
- Department of Chemical Machinery and Control Engineering, School of Chemical Engineering, Sichuan University, Sichuan 610065, China
| | - Masayoshi Watanabe
- Department of Chemistry and Biotechnology, Yokohama National University, Yokohama 240-8501, Japan
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6
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Işık D, Quaas E, Klinger D. Thermo- and oxidation-sensitive poly(meth)acrylates based on alkyl sulfoxides: dual-responsive homopolymers from one functional group. Polym Chem 2020. [DOI: 10.1039/d0py01321h] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Alkyl sulfoxide side groups introduce thermo- and oxidation-sensitivity into poly(meth)acrylates, thus realizing new dual-responsive homopolymers based on one functional group.
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Affiliation(s)
- Doğuş Işık
- Institute of Pharmacy
- Freie Universität Berlin
- 14195 Berlin
- Germany
| | - Elisa Quaas
- Institute of Chemistry
- Freie Universität Berlin
- 14195 Berlin
- Germany
| | - Daniel Klinger
- Institute of Pharmacy
- Freie Universität Berlin
- 14195 Berlin
- Germany
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7
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Qureshi D, Nayak SK, Maji S, Anis A, Kim D, Pal K. Environment sensitive hydrogels for drug delivery applications. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.109220] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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8
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Zhao C, Ma Z, Zhu X. Rational design of thermoresponsive polymers in aqueous solutions: A thermodynamics map. Prog Polym Sci 2019. [DOI: 10.1016/j.progpolymsci.2019.01.001] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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9
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Zhong Q, Lu M, Nieuwenhuis S, Wu BS, Wu GP, Xu ZK, Müller-Buschbaum P, Wang JP. Enhanced Stain Removal and Comfort Control Achieved by Cross-Linking Light and Thermo Dual-Responsive Copolymer onto Cotton Fabrics. ACS APPLIED MATERIALS & INTERFACES 2019; 11:5414-5426. [PMID: 30640436 DOI: 10.1021/acsami.8b19908] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Enhanced capabilities of stain removal and comfort control are simultaneously achieved by the light and thermo dual-responsive copolymer poly(triethylene glycol methyl ether methacrylate- co-ethylene glycol methacrylate- co-acrylamide azobenzene) (P(MEO3MA- co-EGMA- co-AAAB)) cross-linked on cotton fabrics. P(MEO3MA- co-EGMA- co-AAAB) is synthesized by sequential atom transfer radical polymerization with a molar ratio of 8 (MEO3MA):1 (EGMA):1 (AAAB). The MEO3MA units induce a thermoresponsive behavior to the copolymer. The hydrophilicity of the copolymer films can be further improved by the light-induced trans- cis isomerization of the AAAB units with UV radiation. The copolymer is facilely immobilized onto cotton fabrics with 1,2,3,4-butane tetracarboxylic acid as cross-linker. Due to the immobilization of P(MEO3MA- co-EGMA- co-AAAB), the hydrophilicity of the fabric surface is increased under UV radiation. Therefore, by simply installing a UV light source in the washing machine, better capability of stain removal is realized for the cross-linked cotton fabrics. It can prominently reduce the consumption of energy, water, and surfactants in laundry. In addition, the trans-AAAB units of the copolymer cause the cross-linked P(MEO3MA- co-EGMA- co-AAAB) layer to be more hydrophobic under ambient conditions. Hence, the copolymer can more easily collapse and form a porous structure on the fabrics. Thus, the air permeability of cotton fabrics cross-linked with P(MEO3MA- co-EGMA- co-AAAB) is enhanced by 13% at human body temperature as compared to P(MEO3MA- co-EGMA), giving improved comfort control during daily wear.
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Affiliation(s)
- Qi Zhong
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education; National Base for International Science and Technology Cooperation in Textiles and Consumer-Goods Chemistry , Zhejiang Sci-Tech University , 310018 Hangzhou , China
- Technische Universität München, Physik-Department , Lehrstuhl für Funktionelle Materialien , James-Franck-Strasse 1 , 85748 Garching , Germany
| | - Min Lu
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education; National Base for International Science and Technology Cooperation in Textiles and Consumer-Goods Chemistry , Zhejiang Sci-Tech University , 310018 Hangzhou , China
| | - Sophie Nieuwenhuis
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education; National Base for International Science and Technology Cooperation in Textiles and Consumer-Goods Chemistry , Zhejiang Sci-Tech University , 310018 Hangzhou , China
| | - Bi-Sheng Wu
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education; National Base for International Science and Technology Cooperation in Textiles and Consumer-Goods Chemistry , Zhejiang Sci-Tech University , 310018 Hangzhou , China
| | - Guang-Peng Wu
- MOE Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Zhi-Kang Xu
- MOE Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Peter Müller-Buschbaum
- Technische Universität München, Physik-Department , Lehrstuhl für Funktionelle Materialien , James-Franck-Strasse 1 , 85748 Garching , Germany
| | - Ji-Ping Wang
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education; National Base for International Science and Technology Cooperation in Textiles and Consumer-Goods Chemistry , Zhejiang Sci-Tech University , 310018 Hangzhou , China
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10
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Vasantha VA, Junhui C, Wenguang Z, van Herk AM, Parthiban A. Reversible Photo- and Thermoresponsive, Self-Assembling Azobenzene Containing Zwitterionic Polymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:1465-1474. [PMID: 30103606 DOI: 10.1021/acs.langmuir.8b01820] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Commercially available azo dyes bearing amino groups were grafted to zwitterionic copolymers composed of cyclic anhydride functionality. The zwitterionic copolymers were prepared for the first time by polymerizing sulfobetaine (SB) monomer with maleic anhydride (MA) under conventional free radical polymerization as well as reversible addition-fragmentation chain transfer (RAFT) polymerization. Poly(SB- co-MA) self-assembled in deionized water. Azobenzene grafted zwitterionic poly((SB- co-MA)- g-Azo) exhibited multiresponsive behavior. As confirmed by UV-vis spectroscopy, trans → cis isomerization of the azo group was responsible for the photo- and thermal responsive behavior. The photoisomerization was reversible, and no photoaging was detected during the repeated exposure to UV and visible light. The water-soluble nature of photoresponsive azo dye grafted copolymers makes it suitable for applications in biological systems.
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Affiliation(s)
- Vivek Arjunan Vasantha
- Institute of Chemical and Engineering Sciences , Agency for Science, Technology and Research (A*STAR) , 1 Pesek Road , Jurong Island, Singapore 627833
| | - Chen Junhui
- Institute of Chemical and Engineering Sciences , Agency for Science, Technology and Research (A*STAR) , 1 Pesek Road , Jurong Island, Singapore 627833
| | - Zhao Wenguang
- Institute of Chemical and Engineering Sciences , Agency for Science, Technology and Research (A*STAR) , 1 Pesek Road , Jurong Island, Singapore 627833
| | - Alexander M van Herk
- Institute of Chemical and Engineering Sciences , Agency for Science, Technology and Research (A*STAR) , 1 Pesek Road , Jurong Island, Singapore 627833
| | - Anbanandam Parthiban
- Institute of Chemical and Engineering Sciences , Agency for Science, Technology and Research (A*STAR) , 1 Pesek Road , Jurong Island, Singapore 627833
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11
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Qian S, Li S, Xiong W, Khan H, Huang J, Zhang W. A new visible light and temperature responsive diblock copolymer. Polym Chem 2019. [DOI: 10.1039/c9py01050e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A visible light and temperature responsive diblock copolymer of poly[6-(2,6,2′,6′-tetramethoxy-4′-oxyazobenzene) hexyl methacrylate]-block-poly(N-isopropylacrylamide) (PmAzo-b-PNIPAM) was synthesized via RAFT polymerization by carefully tuning the polymerization conditions.
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Affiliation(s)
- Sijia Qian
- Key Laboratory of Functional Polymer Materials of the Ministry of Education
- Institute of Polymer Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Shenzhen Li
- Key Laboratory of Functional Polymer Materials of the Ministry of Education
- Institute of Polymer Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Weifeng Xiong
- State Key Laboratory of Special Functional Waterproof Materials
- Beijing Oriental Yuhong Waterproof Technology Co
- Ltd
- Beijing 100123
- China
| | - Habib Khan
- Key Laboratory of Functional Polymer Materials of the Ministry of Education
- Institute of Polymer Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Jing Huang
- Sinopec Research Institute of Petroleum Engineering
- Beijing
- China
| | - Wangqing Zhang
- Key Laboratory of Functional Polymer Materials of the Ministry of Education
- Institute of Polymer Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
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12
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Ren H, Qiu XP, Shi Y, Yang P, Winnik FM. Light, temperature, and pH control of aqueous azopyridine-terminated poly(N-isopropylacrylamide) solutions. Polym Chem 2019. [DOI: 10.1039/c9py01086f] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Azopyridines (AzPy) act as light-sensitive groups that undergo reversible cis–trans isomerization upon UV irradiation, as hydrogen-bond acceptors, and as ionizable moieties.
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Affiliation(s)
- Hao Ren
- Key Laboratory of Applied Surface and Colloid Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
| | - Xing-Ping Qiu
- Department of Chemistry
- University of Montreal
- CP 6128 Succursale Centre Ville
- Montreal
- Canada
| | - Yan Shi
- School of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Peng Yang
- Key Laboratory of Applied Surface and Colloid Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
| | - Françoise M. Winnik
- Laboratory of Polymer Chemistry
- Department of Chemistry
- PB 55
- University of Helsinki
- Helsinki FI00140
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13
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Jin J, Tang M, Zhang Z, Zhou K, Gao Y, Zheng ZG, Zhang W. Synthesis of POSS-functionalized liquid crystalline block copolymers via RAFT polymerization for stabilizing blue phase helical soft superstructures. Polym Chem 2018. [DOI: 10.1039/c8py00136g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A study of the phase transition behaviors of blue phase liquid crystals containing different amounts of POSS-functionalized LC BCPs.
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Affiliation(s)
- Jianqiu Jin
- Shanghai Key Laboratory of Functional Materials Chemistry
- Department of Physics
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Mingjie Tang
- Shanghai Key Laboratory of Functional Materials Chemistry
- Department of Physics
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Zhenghe Zhang
- Shanghai Key Laboratory of Functional Materials Chemistry
- Department of Physics
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Kang Zhou
- Shanghai Key Laboratory of Functional Materials Chemistry
- Department of Physics
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Yun Gao
- Shanghai Key Laboratory of Functional Materials Chemistry
- Department of Physics
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Zhi-Gang Zheng
- Shanghai Key Laboratory of Functional Materials Chemistry
- Department of Physics
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Weian Zhang
- Shanghai Key Laboratory of Functional Materials Chemistry
- Department of Physics
- East China University of Science and Technology
- Shanghai 200237
- China
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14
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Yang C, Chen L, Huang H, Lu Y, Xiong B, Liu Y, Yi J. Effects of molecular weight on dual light- and thermo-responsive behaviors of homopolymers with azobenzene units and terminal oligo(ethylene glycol) units. POLYM INT 2017. [DOI: 10.1002/pi.5434] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- ChangAn Yang
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang PR China
| | - Ling Chen
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang PR China
| | - He Huang
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang PR China
| | - Ying Lu
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang PR China
| | - Biquan Xiong
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang PR China
| | - Yu Liu
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang PR China
| | - Jianmin Yi
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang PR China
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15
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Weng G, Huang Y, Thanneeru S, Li H, Alamri A, He J. Cross-linking of COOH-containing polymers using Ag(i)-catalyzed oxidative decarboxylation in aqueous solution. SOFT MATTER 2017; 13:5028-5037. [PMID: 28657101 DOI: 10.1039/c7sm00825b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Cross-linking that defines the three-dimensional networks in hydrogels has a significant impact on their physiochemical properties. The cross-linking of hydrophilic polymers via post-polymerization reactions is an ideal way to manufacture hydrogels with high reproducibility and without monomer residuals. We herein report the use of Ag(i)-catalyzed oxidative decarboxylation to cross-link poly(acrylic acid) (PAA) and a family of COOH-containing hydrophilic polymers. Our method is based on the radical-mediated elimination reaction to remove COOH group(s) and generate alkyl radical(s) simultaneously, in the presence of AgNO3 and persulfates. The further intermolecular radical coupling is demonstrated to be very effective in inducing cross-linking and gelation of COOH-containing hydrophilic polymers. The cross-linking reaction can be readily achieved by simply mixing a small amount of AgNO3 (as low as 0.03 wt%) and persulfates with polymers at room temperature in air. Rheological measurements show that the gelation occurs in 20-30 min. The applications of oxidative decarboxylation in the preparation of hydrogels of COOH-containing hydrophilic copolymers and their interpenetrating polymer network (IPN) hydrogels are further validated. Finally, the residual Ag(i) ions in hydrogels are discussed in terms of how Ag(i) ions further change the mechanical and optical properties of hydrogels by photoreduction of Ag(i) to Ag nanoparticles. We expect that this Ag(i)-catalyzed oxidative decarboxylation chemistry can not only serve as a facile and general strategy to produce hydrogels through post-polymerization, but also enrich the toolbox of cross-linking chemistries of COOH-containing polymers in all forms (e.g. films, colloids and dispersions).
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Affiliation(s)
- Gengsheng Weng
- School of Materials and Chemical Engineering, Ningbo Key Laboratory of Specialty Polymers, Ningbo University, Ningbo, 315211, China and Department of Chemistry, University of Connecticut, Storrs, CT 06269, USA.
| | - Yu Huang
- Department of Chemistry, University of Connecticut, Storrs, CT 06269, USA. and College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, China
| | - Srinivas Thanneeru
- Department of Chemistry, University of Connecticut, Storrs, CT 06269, USA.
| | - Hongqiang Li
- Department of Chemistry, University of Connecticut, Storrs, CT 06269, USA. and College of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Abdullah Alamri
- Department of Chemistry, University of Connecticut, Storrs, CT 06269, USA.
| | - Jie He
- Department of Chemistry, University of Connecticut, Storrs, CT 06269, USA. and Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
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16
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Gao F, Xing Y, Yao Y, Sun L, Sun Y, He X, Lin S. Self-assembly and multi-stimuli responsive behavior of PAA-b-PAzoMA-b-PNIPAM triblock copolymers. Polym Chem 2017. [DOI: 10.1039/c7py01591g] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A PAA-b-PAzoMA-b-PNIPAM triblock copolymer containing pH, photo and temperature sensitive groups could self-assemble into spherical micelles or vesicles with multi-stimuli responsiveness.
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Affiliation(s)
- Fei Gao
- Shanghai Key Laboratory of Advanced Polymeric Materials
- Key Laboratory for Ultrafine Materials of Ministry of Education
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Yaohui Xing
- Shanghai Key Laboratory of Advanced Polymeric Materials
- Key Laboratory for Ultrafine Materials of Ministry of Education
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Yuan Yao
- Shanghai Key Laboratory of Advanced Polymeric Materials
- Key Laboratory for Ultrafine Materials of Ministry of Education
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Liuying Sun
- Shanghai Key Laboratory of Advanced Polymeric Materials
- Key Laboratory for Ultrafine Materials of Ministry of Education
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Yao Sun
- Shanghai Key Laboratory of Advanced Polymeric Materials
- Key Laboratory for Ultrafine Materials of Ministry of Education
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Xiaohua He
- Department of Chemistry
- East China Normal University
- Shanghai 200241
- China
| | - Shaoliang Lin
- Shanghai Key Laboratory of Advanced Polymeric Materials
- Key Laboratory for Ultrafine Materials of Ministry of Education
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
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17
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Abstract
Photo-responsive polymers are able to change their structure, conformation and properties upon light irradiation.
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Affiliation(s)
- Olivier Bertrand
- Institute of Condensed Matter and Nanosciences (IMCN)
- Bio- and Soft Matter (BSMA)
- Université catholique de Louvain
- 1348 Louvain-la-Neuve
- Belgium
| | - Jean-François Gohy
- Institute of Condensed Matter and Nanosciences (IMCN)
- Bio- and Soft Matter (BSMA)
- Université catholique de Louvain
- 1348 Louvain-la-Neuve
- Belgium
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18
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Wang C, Ma X, Kitazawa Y, Kobayashi Y, Zhang S, Kokubo H, Watanabe M. From Macromolecular to Small-Molecular Triggers: Facile Method toward Photoinduced LCST Phase Behavior of Thermoresponsive Polymers in Mixed Ionic Liquids Containing an Azobenzene Moiety. Macromol Rapid Commun 2016; 37:1960-1965. [DOI: 10.1002/marc.201600360] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Revised: 07/21/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Caihong Wang
- Department of Chemistry and Biotechnology; Yokohama National University; 79-5 Tokiwadai Hodogaya-ku Yokohama 240-8501 Japan
| | - Xiaofeng Ma
- Department of Chemistry and Biotechnology; Yokohama National University; 79-5 Tokiwadai Hodogaya-ku Yokohama 240-8501 Japan
| | - Yuzo Kitazawa
- Department of Chemistry and Biotechnology; Yokohama National University; 79-5 Tokiwadai Hodogaya-ku Yokohama 240-8501 Japan
| | - Yumi Kobayashi
- Department of Chemistry and Biotechnology; Yokohama National University; 79-5 Tokiwadai Hodogaya-ku Yokohama 240-8501 Japan
| | - Shiguo Zhang
- Department of Chemistry and Biotechnology; Yokohama National University; 79-5 Tokiwadai Hodogaya-ku Yokohama 240-8501 Japan
| | - Hisashi Kokubo
- Department of Chemistry and Biotechnology; Yokohama National University; 79-5 Tokiwadai Hodogaya-ku Yokohama 240-8501 Japan
| | - Masayoshi Watanabe
- Department of Chemistry and Biotechnology; Yokohama National University; 79-5 Tokiwadai Hodogaya-ku Yokohama 240-8501 Japan
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19
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20
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Multi-responsive fluorescence of amphiphilic diblock copolymer containing carboxylate azobenzene and N-isopropylacrylamide. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.05.074] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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21
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Huang W, Yang J, Xia Y, Wang X, Xue X, Yang H, Wang G, Jiang B, Li F, Komarneni S. Light and Temperature as Dual Stimuli Lead to Self-Assembly of Hyperbranched Azobenzene-Terminated Poly(N-isopropylacrylamide). Polymers (Basel) 2016; 8:E183. [PMID: 30979277 PMCID: PMC6432090 DOI: 10.3390/polym8050183] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 04/11/2016] [Accepted: 04/15/2016] [Indexed: 11/16/2022] Open
Abstract
Hyperbranched poly(N-isopropylacrylamide)s (HBPNIPAMs) end-capped with different azobenzene chromophores (HBPNIPAM-Azo-OC₃H₇, HBPNIPAM-Azo-OCH₃, HBPNIPAM-Azo, and HBPNIPAM-Azo-COOH) were successfully synthesized by atom transfer radical polymerization (ATRP) of N-isopropylacrylamide using different azobenzene-functional initiators. All HBPNIPAMs showed a similar highly branched structure, similar content of azobenzene chromophores, and similar absolute weight/average molecular weight. The different azobenzene structures at the end of the HBPNIPAMs exhibited reversible trans-cis-trans isomerization behavior under alternating UV and Vis irradiation, which lowered the critical solution temperature (LCST) due to different self-assembling behaviors. The spherical aggregates of HBPNIPAM-Azo-OC₃H₇ and HBPNIPAM-Azo-OCH₃ containing hydrophobic para substituents either changed to bigger nanorods or increased in number, leading to a change in LCST of -2.0 and -1.0 °C, respectively, after UV irradiation. However, the unimolecular aggregates of HBPNIPAM-Azo were unchanged, while the unstable multimolecular particles of HBPNIPAM-Azo-COOH end-capped with strongly polar carboxyl groups partly dissociated to form a greater number of unimolecular aggregates and led to an LCST increase of 1.0 °C.
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Affiliation(s)
- Wenyan Huang
- Jiangsu Key Laboratory of Material Surface Science and Technology, School of Material Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu, China.
| | - Jing Yang
- Jiangsu Key Laboratory of Material Surface Science and Technology, School of Material Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu, China.
| | - Yunqing Xia
- Jiangsu Key Laboratory of Material Surface Science and Technology, School of Material Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu, China.
| | - Xuezi Wang
- Jiangsu Key Laboratory of Material Surface Science and Technology, School of Material Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu, China.
| | - Xiaoqiang Xue
- Jiangsu Key Laboratory of Material Surface Science and Technology, School of Material Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu, China.
- Materials Research Laboratory, Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA.
| | - Hongjun Yang
- Jiangsu Key Laboratory of Material Surface Science and Technology, School of Material Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu, China.
| | - Guifang Wang
- Materials Research Laboratory, Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA.
- School of Resource and Metallurgy, Guangxi University, Nanning 530004, Guangxi, China.
| | - Bibiao Jiang
- Jiangsu Key Laboratory of Material Surface Science and Technology, School of Material Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu, China.
| | - Fang Li
- Jiangsu Key Laboratory of Material Surface Science and Technology, School of Material Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu, China.
| | - Sridhar Komarneni
- Materials Research Laboratory, Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA.
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22
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Bertrand O, Vlad A, Hoogenboom R, Gohy JF. Redox-controlled upper critical solution temperature behaviour of a nitroxide containing polymer in alcohol–water mixtures. Polym Chem 2016. [DOI: 10.1039/c5py01864a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Research on stimuli responsive polymers builds momentum as nature-inspired applications using man-made materials are increasingly sought.
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Affiliation(s)
- Olivier Bertrand
- Institute of Condensed Matter and Nanoscience (IMCN)
- Bio- and Soft Matter (BSMA)
- Université Catholique de Louvain
- 1348 Louvain-la-Neuve
- Belgium
| | - Alexandru Vlad
- Institute of Condensed Matter and Nanoscience (IMCN)
- Molecules
- Solid and Reactivity (MOST)
- Université Catholique de Louvain
- 1348 Louvain-la-Neuve
| | - Richard Hoogenboom
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- Ghent
- Belgium
| | - Jean-François Gohy
- Institute of Condensed Matter and Nanoscience (IMCN)
- Bio- and Soft Matter (BSMA)
- Université Catholique de Louvain
- 1348 Louvain-la-Neuve
- Belgium
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23
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Yang C, Chen L, Lu Y, Huang H. Dual thermo- and light-responsive dendron-jacketed homopolymers containing photoswitchable azobenzene groups via a macromonomer route. Polym Chem 2016. [DOI: 10.1039/c6py01582d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The novel dendron-jacketed homopolymer containing photoswitchable azobenzene groups and short oligo(ethylene glycol) (OEG) units was synthesized via a macromonomer route, which can exhibit interesting dual thermo- and light-responsive behaviours.
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Affiliation(s)
- ChangAn Yang
- Department of Chemistry and Chemical Engineering
- Hunan Institute of Science and Technology
- Yueyang 414006
- P. R China
| | - Ling Chen
- Department of Chemistry and Chemical Engineering
- Hunan Institute of Science and Technology
- Yueyang 414006
- P. R China
| | - Ying Lu
- Department of Chemistry and Chemical Engineering
- Hunan Institute of Science and Technology
- Yueyang 414006
- P. R China
| | - He Huang
- Department of Chemistry and Chemical Engineering
- Hunan Institute of Science and Technology
- Yueyang 414006
- P. R China
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24
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Vapaavuori J, Grosrenaud J, Pellerin C, Bazuin CG. In Situ Photocontrol of Block Copolymer Morphology During Dip-Coating of Thin Films. ACS Macro Lett 2015; 4:1158-1162. [PMID: 35614798 DOI: 10.1021/acsmacrolett.5b00483] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
We demonstrate a unique combination of simultaneous top-down and bottom-up control of the morphology of block copolymer films by application of in situ optical irradiation during dip-coating. A light-addressable and block-selective small molecule, 4-butyl-4'-hydroxyazobenzene (BHAB), is introduced into a diblock copolymer of polystyrene and poly(4-vinylpyridine) (PS-P4VP) of 28.4 wt % P4VP via supramolecular chemistry, notably by hydrogen bonding to P4VP. We show that the spherical morphology of thin films dip-coated from a THF solution at slow withdrawal rates in the dark convert to cylindrical morphology when dip-coated under illumination. This is attributed to volume expansion of the P4VP/BHAB phase due to trans-cis photoisomerization combined with a light-induced increase in BHAB uptake in the film. The demonstrated photocontrol highlights the potential of dip-coating as a scalable film preparation method that can be easily coupled with external stimuli to direct nanostructured self-assembly in the films as solvent evaporates.
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Affiliation(s)
- Jaana Vapaavuori
- Département de chimie,
Centre de recherche sur les matériaux auto−assemblés
(CRMAA/CSACS), Université de Montréal, C.P. 6128 Succ. Centre−ville, Montréal, QC, Canada H3C 3J7
| | - Josué Grosrenaud
- Département de chimie,
Centre de recherche sur les matériaux auto−assemblés
(CRMAA/CSACS), Université de Montréal, C.P. 6128 Succ. Centre−ville, Montréal, QC, Canada H3C 3J7
| | - Christian Pellerin
- Département de chimie,
Centre de recherche sur les matériaux auto−assemblés
(CRMAA/CSACS), Université de Montréal, C.P. 6128 Succ. Centre−ville, Montréal, QC, Canada H3C 3J7
| | - C. Geraldine Bazuin
- Département de chimie,
Centre de recherche sur les matériaux auto−assemblés
(CRMAA/CSACS), Université de Montréal, C.P. 6128 Succ. Centre−ville, Montréal, QC, Canada H3C 3J7
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25
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Xue X, Yang J, Huang W, Yang H, Jiang B, Li F, Jiang Y. Dual thermo- and light-responsive nanorods from self-assembly of the 4-propoxyazobenzene-terminated poly(N-isopropylacrylamide) in aqueous solution. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.07.035] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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26
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The effect of gamma irradiation on the fluorescence properties of 1,4,5,8-naphtalisoimides. Radiat Phys Chem Oxf Engl 1993 2015. [DOI: 10.1016/j.radphyschem.2015.01.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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27
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Zhang H, Tong X, Zhao Y. Diverse thermoresponsive behaviors of uncharged UCST block copolymer micelles in physiological medium. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:11433-11441. [PMID: 25141758 DOI: 10.1021/la5026334] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Three amphiphilic diblock copolymers, representative of three types of block copolymer (BCP) design, were synthesized using reversible addition-fragmentation chain-transfer (RAFT) polymerization. All of them have a same uncharged block of a random copolymer of commercially available acrylamide and acrylonitrile, P(AAm-co-AN), and exhibit a composition-tunable upper critical solution temperature (UCST). We show that by coupling a common P(AAm-co-AN) block with either hydrophobic polystyrene (PS) or hydrophilic poly(dimethylacrylamide) (PDMA) or the lower critical solution temperature (LCST) polymer of poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA), the BCP micelles formed in water or in phosphate buffered saline (PBS) can display diverse and UCST-dictated changes in response to temperature variations, such as the reversible dispersion-aggregation of micelles, dissolution-formation of micelles, and reversal of micelle core and corona. The results point out that P(AAm-co-AN) is a robust UCST polymer that can be introduced into controlled polymer architectures producible by RAFT, the same way as using the extensively studied LCST counterparts like poly(N-isopropylacrylamide) (PNIPAM). This ability should make the door wide open to exploring new thermosensitive polymers based on the thermosensitivity opposite to the LCST.
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Affiliation(s)
- Hu Zhang
- Département de Chimie, Université de Sherbrooke , Sherbrooke, Quebec Canada J1K 2R1
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