DIPOLE ORIENTED ANION BINDING AND EXCHANGE IN ZWITTERIONIC MICELLES

被引：30
|
作者：
BAPTISTA, MS
POLITI, MJ
机构：
[1] UNIV SAO PAULO,INST QUIM,DEPT BIOQUIM,CAIXA POSTAL 20780,BR-01498 SAO PAULO,BRAZIL
[2] UNIV SAO PAULO,INTERDEPT CINET RAPIDA LAB,BR-01498 SAO PAULO,BRAZIL
来源：
JOURNAL OF PHYSICAL CHEMISTRY | 1991年 / 95卷 / 15期
关键词：
D O I：
10.1021/j100168a042
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The binding of 8-hydroxy-1,3,6-pyrenetrisulfonate anion (POH) to zwitterionic interfaces of 3-(N-hexadecyl-N,N-dimethylammonium)propanesulfonate (HPS), lysolecithin (lysPC) micelles, or lecithin sonicated vesicles was measured by steady-state fluorescence emission of POH. The addition of inert salts displaced bound POH in the three systems, showing the electrostatic nature of the binding. H-1 NMR spectra, degree of polarization of fluorescence (P), and emission intensities due to the excited-state prototropic dissociation of POH together pointed to a dipole-potential-driven anion binding and exchange in these formally neutral surfaces.
引用
收藏
页码：5936 / 5942
页数：7
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