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论文类型：期刊论文

发表时间：2013-11-21

发表刊物：RSC ADVANCES

收录刊物：SCIE、EI、Scopus

卷号：3

期号：43

页面范围：20345-20352

ISSN号：2046-2069

摘要：This paper demonstrated fluorescence behaviour of two novel coumarin-containing dendrigraft polybutadienes (PB-Cou) with linear-comb (LC-PB-Cou) and star-comb (SC-PB-Cou) architectures. LC-PB-Cou and SC-PB-Cou with 12-13 mol% coumarin content were synthesized via the combination of anionic polymerization and "click" chemistry methodology. The photophysical behaviours were investigated based on UV-Vis spectroscopy and fluorescence spectroscopy. The tailor-made LC-PB-Cou and SC-PB-Cou were designed to possess almost identical branching parameters except for architecture. The results of the study suggested that the fluorescent properties of coumarin were improved after being introduced into the dendrigraft polymer. The fluorescence quantum yield (FF) of LC-PB-Cou (7.3%) and SC-PB-Cou (5.4%) significantly increased, compared with that of coumarin itself (1.7%). Furthermore, LC-PB-Cou had the advantage over SC-PB-Cou in fluorescent properties because of its looser conformation.