Synthesis and characterization of fluorescence end‐labeled polystyrene via reversible addition‐fragmentation chain transfer (RAFT) polymerization |
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| Authors: | Di Zhou Xiulin Zhu Jian Zhu Zhenping Cheng |
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| Affiliation: | 1. Key Lab. of Organic Synthesis of Jiangsu Province, School of Chemistry and Chemical Engineering, Soochow (Suzhou) University, Suzhou, 215006, China;2. Chemistry Department, Jiangsu Key Lab. of Advanced Functional Materials, Changshu Institute of Technology, Changshu, China |
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| Abstract: | Fluorescence end‐labeled polystyrene (PS) with heteroaromatic carbazole or indole group were prepared conveniently via reversible addition‐fragmentation chain transfer (RAFT) polymerization using dithiocarbamates, ethyl 2‐(9H‐carbazole‐9‐carbonothioylthio)propanoate (ECCP) and benzyl 2‐phenyl‐1H‐indole‐1‐carbodithioate (BPIC) as RAFT agents. The end functionality of obtained PS with different molecular weights was high. The steady‐state and the time‐resolved fluorescence techniques had been used to study the fluorescence behaviors of obtained end‐labeled PS. The fluorescence of dithiocarbamates resulting PS in solid powder cannot be monitored; however, they exhibited structured absorptions and emissions in solvent DMF and the fluorescence lifetimes of PS had no obvious change with molecular weights increasing. These observations suggested that the polymer chains were possibly stretched adequately in DMF, that is, the fluorescence end group was exposed into solvent molecules and little quenching of excited state occurred upon incorporation into polymer chain. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 6198–6205, 2008 |
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| Keywords: | fluorescence polystyrene reversible addition‐fragmentation chain transfer (RAFT) |
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