The effect of micelle-water interface electric field on the intramolecular charge transfer within ionic micelle - Dual fluorescence of sodium p-dialkylaminobenzoates in cetyltrimethylammonium micelles
- 化学化工－已发表论文 
Photoinduced intramolecular charge transfer (CT) of sodium p-(dimethylamino)- and p-(diethylamino) benzoates (SDMAB and SDEAB) in cetyltrimethylammonium bromide and chloride (CTAB and CTAC) micellar solutions was investigated by the CT typical dual fluorescence, in order to identify the effect of micelle-water interface electric field on the CT process occurring within ionic micelle. The CT fluorescence in CTAB and CTAC micelles was blue shifted and enhanced compared to those in pure water. The intensity ratio of the CT fluorescence to the LE fluorescence, I-a/I-b, of either SDMAB or SDEAB was found to be higher in CTAC micelle than in CTAB micelle, while these fluorophores experience the same polarity in both micelle environments. It was proposed that the higher I-a/I-b ratio in CTAC micelle was due to stronger electric field at CTAC micelle-water interface. This was supported by experiments on the dual fluorescence of SDEAB and SDMAB of different CT-state dipole moment in CTAB micelles of varying micelle-water interface electric field. It was demonstrated that the electric field at the ionic micelle-water interface indeed affected the CT process occurring within micelle that the CT process is promoted and the CT emission is enhanced at higher electric field. Ionic micelle was shown capable of acting as the electric field 'mediator' for chemo- and biosensing based on the dependence of the CT dual fluorescence on electric field. (C) 1999 Elsevier Science S.A. All rights reserved.
CitationJOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY，1999,126（1-3）：125-133
Showing items related by title, author, creator and subject.
Self-assembled nanoparticles of cholesterol-modified O-carboxymethyl chitosan as a novel carrier for paclitaxel Wang, Y. S.; Jiang, Q.; Li, R. S.; Liu, L. L.; Zhang, Q. Q.; Wang, Y. M.; Zhao, J.; 张其清 (2008-04-09)Self-assembled nanoparticles of cholesterol-modified O-carboxymethyl chitosan (CCMC) were prepared to be used as a novel carrier for paclitaxel (PTX) in this study. CCMC-6.9 was synthesized by the covalent conjugation of ...
Cheng, Hua; Li, Jin-Jin; Luo, Zheng-Hong; 罗正鸿 (WILEY-BLACKWELL, 2012-04)Charming polygonal micelles: The self-assembly bahavior of fluorosilicone copolymers with equal block length could bring about the generation of novel large compound rods micelles and microsize vesicles. Interestingly, ...
Heterogeneous silver-polyaniline nanocomposites with tunable morphology and controllable catalytic properties Yuan, Conghui; Xu, Yiting; Zhong, Lina; Zhang, Long; Yang, Cangjie; Jiang, Binjie; Deng, Yuanming; Zeng, Birong; He, Ning; Luo, Weiang; Dai, Lizong; 许一婷; 曾碧榕; 何宁; 戴李宗 (IOP PUBLISHING LTD, 2013-May 1)This paper introduces not only a simple hydrothermal route to silver-polyaniline (Ag-PANI) nanocomposites with controllable morphology, but also a type of catalyst possessing tunable and switchable catalytic capability. ...