PHOTOCHEMISTRY OF SEMICONDUCTOR PARTICLES .2. ADSORPTION OF IONS ON ZNS COLLOID AND QUENCHING OF FLUORESCENCE

被引：6

作者：

ZANG, L ^{[1
]}

LIU, CY ^{[1
]}

REN, XM ^{[1
]}

机构：

[1] ACAD SINICA,INST PHOTOG CHEM,BEIJING 100101,PEOPLES R CHINA

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1994年 / 79卷 / 03期

关键词：

D O I：

10.1016/1010-6030(93)03761-5

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：

Various ions were used to study the adsorption on the ZnS particle and the quenching of fluorescence. Three kinds of adsorption process were found for these ions. The mechanism of the fluorescence quenching depends on the nature of the adsorption process. A nearly dynamic quenching was found for MV2+ ions, whereas quenching by Cd2+ ions was mainly through the static process. The quenching efficiency is determined by the chemical properties of the ion, such as the adsorbability and redox potential. Of all the ions used, the Cd2+ and MV2+ ions are the most effective quenchers. It has also been found that the quenching depends strongly upon the surface condition, which determines the distribution of the photogenerated charge carriers in the ZnS particle.

引用

页码：197 / 202

页数：6