Dramatic effect of magnetite particles on the dynamics of photogenerated free radicals

被引：21

作者：

Scaiano, JC

Monahan, S

Renaud, J

机构：

[1] Department of Chemistry, University of Ottawa, Ottawa, Ont.

[2] Department of Chemistry, University of Ottawa, Ottawa, Ont. KIN 6N5

来源：

PHOTOCHEMISTRY AND PHOTOBIOLOGY | 1997年 / 65卷 / 04期

关键词：

D O I：

10.1111/j.1751-1097.1997.tb01921.x

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Polymeric particles of about 1 mu m in diameter and containing around 40% magnetite have a dramatic influence on the dynamics of triplet radical pair reactions occurring in micelles in their vicinity. The effect has been monitored with laser flash photolysis techniques and results in a decrease of the number of radicals that separate from their geminate partner and an acceleration of radical pair geminate reactions. The effect involves remote interactions because the solution contains ca 10(11) micelles for each polymeric particle. Magnetite also perturbs the way in which the radicals interact with an external magnetic field.

引用

页码：759 / 762

页数：4

共 28 条

[1] EXPLORATORY-STUDY OF THE APPLICATION OF TRANSMISSION AND DIFFUSE-REFLECTANCE LASER TECHNIQUES IN THE STUDY OF FREE-RADICAL PROCESSES IN VESICLES [J].