https://scholars.lib.ntu.edu.tw/handle/123456789/623906
標題: | Polystyrene with Persistently Enhanced Fluorescence: Photo-Induced Atom Transfer Radical Polymerization Using a Pyrene-Based Initiator | 作者: | Su C.-H. Wu Z. Lin C.-K. Han H.-A. Chen Y.-A. Chou P.-T. Fu X. CHI-HOW PENG |
關鍵字: | atom transfer radical polymerisation;fluorescence;photopolymerisation;pyrene;styrene | 公開日期: | 2019 | 卷: | 3 | 期: | 11 | 起(迄)頁: | 1153-1161 | 來源出版物: | ChemPhotoChem | 摘要: | The pyrene-based atom transfer radical polymerization (ATRP) initiator of 1-pyrenemethyl 2-bromoisobutyrate (PMBriB) was applied to the photo-induced radical polymerization of methyl acrylate, methyl methacrylate, and styrene. During the polymerization, the fluorescence of the polymer solution caused by the chain end pyrene group was observed to be slightly enhanced in all cases, possibly due to the decline of the aggregation caused quenching (ACQ) effect. However, the fluorescence of polystyrene obtained from photo-induced ATRP was significantly increased. Differential scanning calorimeter (DSC) measurements, NMR spectroscopy, and fluorescence measurements associated with a series of control studies demonstrated that the enhanced fluorescence was a persistent phenomenon in both solution and the solid state but the polystyrenes with and without enhanced fluorescence showed no observable difference in chemical bonding and molecular conformation. At this stage, the coexistence of pyrene, 2-bromoisobutyrate group, styrene, and light was required for this novel phenomenon and the mechanism of this fluorescence enhancement is still being studied. ? 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85088961457&doi=10.1002%2fcptc.201900138&partnerID=40&md5=2240a0f21be8effb2a5331796ac0e0ed https://scholars.lib.ntu.edu.tw/handle/123456789/623906 |
DOI: | 10.1002/cptc.201900138 |
顯示於: | 化學系 |
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