文献类型：期刊文献

英文题名：Synthesis and photophysical properties of a charm-bracelet type C 60-grafted PPV derivative

作者：Chen, Yu[1,2]; Midorikawa, Tatsuro[2]; Bai, Jinrui[1]; Liu, Yin[1]; Araki, Yasuyuki[2]; Ito, Osamu[1,2]

机构：[1] Lab. for Advanced Materials, Department of Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China; [2] Institute of Multidisciplinary Research for Advanced Materials, CREST, Tohoku University, Katahira 2-1-1, Sendai 980-8577, Japan

年份：2005

卷号：46

期号：23

起止页码：9803

外文期刊名：Polymer

收录：EI(收录号：2005439430770)

语种：英文

外文关键词：Absorption - Crystalline materials - Derivatives - Electron transitions - Fluorescence - Grafting (chemical) - Quenching - Synthesis (chemical) - Textures

摘要：Synthesis and photophysical properties of a new soluble C 60-grafted PPV polymer have been described. Fluorescence quenching of the PPV moiety in C60-grafted PPV polymer was observed, suggesting the energy- and/or electron transfer within the polymer. The fluorescence decay profiles at around 500 nm of this polymer both in chloroform and benzonitrile display a single exponential decay giving the fluorescence lifetimes of 1.10-1.27 ns, which are slightly shorter than that of PPV (about 1.50 ns). The nanosecond transient absorption band of C60-grafted PPV polymer was observed at 740 nm corresponded to the excited triplet state of C60, which decreased in benzonitrile, indicating the existence of the extra decay path of the singlet excited state of the C60 other than intersystem crossing. Upon heating this polymer exhibits typical semilunar liquid crystalline texture, being closely associated with its polymeric structure with long solubilizing alkoxy side chains. ? 2005 Elsevier Ltd. All rights reserved.