PULSED PHOTOACOUSTIC EVALUATION OF INTERSYSTEM CROSSING QUANTUM YIELDS IN FULVIC-ACID

被引：10

作者：

BRUCCOLERI, A

LANGFORD, CH

ARBOUR, C

机构：

[1] Department of Chemistry, Concordia University, Montreal, H3G 1M8, 1455 de Maisonneuve W, PQ

来源：

ENVIRONMENTAL TECHNOLOGY | 1990年 / 11卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1080/09593339009384852

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Time resolved photoacoustic spectroscopy in conjunction with magnetic circular dichroism (MCD) spectroscopy has been applied to determine energies and quantum yields for the formation of triplet states in aqueous solutions of a fulvic acid ranging in pH from 2.0 to 9.5. The triplet energy is estimated as 1.7 × 102 kJ mol−1 from MCD spectra. The intersystem crossing quantum yields are 0.82 to 0.35 for the pH range 2.0 to 9.5. With triplet yields known, the overall photophysics of the fulvic acid can be described. © 1990 Publications Division Selper Ltd.

引用

页码：169 / 172

页数：4

共 12 条

[1]

ARBOUR C, 1987, THESIS CONCORDIA U M

[2]

COOPER SL, 1989, ADV CHEM SER, V219

[3] LIFETIMES, SPECTRA, AND QUENCHING OF THE EXCITED-STATES OF POLYPYRIDINE COMPLEXES OF IRON(II), RUTHENIUM(II), AND OSMIUM(II) [J].