Laser flash photolysis of titanium dioxide suspensions for the evaluation of solvent-mediated radical reactions

被引：2
|
作者：
Hainer, Andrew [1 ]
Joshi, Neeraj [1 ]
Scaiano, Juan C. [1 ]
机构：
[1] Univ Ottawa, Dept Chem & Biomol Sci, 10 Marie Curie, Ottawa, ON K1N 6N5, Canada
来源：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2023年 / 25卷 / 04期
基金：
加拿大创新基金会; 加拿大自然科学与工程研究理事会;
关键词：
ABSORPTION-SPECTRA; TRAPPED HOLES; TIO2; PHOTOCHEMISTRY; PHOTOPHYSICS; TRANSIENT; OXIDATION; POWDER;
D O I：
10.1039/d2cp05170b
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 chemistry originating from the scavenging of the highly electrophilic hole in TiO2 can be readily monitored using laser flash photolysis techniques. Dilute suspensions are sufficiently transparent in the UV region that long lived signals from reactions of solvent radicals with 1,1-diphenylethylene can be readily monitored. Transient signals originating from hole, electron and trapped radicals are extremely long lived showing stretched exponentials (nanoseconds to milliseconds), adequately described by fractal models.
引用
收藏
页码：2747 / 2751
页数：5
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