Highly Fluorescent Aggregates Modulated by Surfactant Structure and Concentration

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• 作者：Defeng Yu ; Qun Zhang ; Chunxian Wu ; Yingxiong Wang ; Lihua Peng ; Deqing Zhang ; Zhibo Li ; Yilin Wang
• 刊名：Journal of Physical Chemistry B
• 出版年：2010
• 出版时间：July 15, 2010
• 年：2010
• 卷：114
• 期：27
• 页码：8934-8940
• 全文大小：362K
• 年卷期：v.114,no.27(July 15, 2010)
• ISSN：1520-5207

文摘

The effects of anionic surfactants on the aggregation-induced emission (AIE) feature of cationic M-silole molecules have been studied. The electrostatic binding of M-silole with the surfactants greatly promotes the aggregation of the mixtures. The M-silole/surfactant aggregates at 1:1 charge ratio exhibit the maximum fluorescence intensity. Excess surfactant molecules will distribute the M-silole molecules into different micelles and weaken the fluorescence. The fluorescence intensity of the mixed M-silole/surfactant aggregates can be effectively modulated by choosing different surfactants. The gemini surfactants display a much stronger ability of enhancing fluorescence intensity than do the single-chain surfactants. Especially, the gemini surfactant with benzene rings shows the best performance in enhancing fluorescence of M-silole due to both the strongest aggregation ability and the π−π interaction with M-silole.