화학공학소재연구정보센터
Journal of Physical Chemistry B, Vol.114, No.27, 8934-8940, 2010
Highly Fluorescent Aggregates Modulated by Surfactant Structure and Concentration
The effects of anionic surfactants on the aggregation-induced emission (ALE) 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 I :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 clue to both the strongest aggregation ability and the pi-pi interaction with M-silole.