Synthesis and photophysical properties of a charm-bracelet type C₆₀-grafted PPV derivative

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• 作者：Yu Chen ; Tatsuro Midorikawa ; Jinrui Bai ; Yin Liu ; Yasuyuki Araki and Osamu Ito
• 关键词：PPV ; C₆₀-grafted PPV ; Synthesis
• 刊名：Polymer
• 出版年：2005
• 期刊代码：83_00323861
• 类别：ms
• 出版时间：2005
• 卷：46
• 期：23
• 页码：9803-9809
• 文件大小：363 K

摘要

Synthesis and photophysical properties of a new soluble C₆₀-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.