Photophysical properties of safranine and phenosafranine -: A comparative study by laser flash photolysis and laser induced optoacoustic spectroscopy

被引：60

作者：

Broglia, MF ^{[1
]}

Gómez, ML ^{[1
]}

Bertolotti, SG ^{[1
]}

Montejano, HA ^{[1
]}

Previtali, CA ^{[1
]}

机构：

[1] Univ Nacl Rio Cuarto, Dept Quim, RA-5800 Rio Cuarto, Argentina

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2005年 / 173卷 / 02期

关键词：

photophysical properties; safranine; phenosafranine; dyes; LIOAS; laser photolysis;

D O I：

10.1016/j.jphotochem.2005.01.010

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 triplet quantum yield of the dyes safranine and phenosafranine was determined in methanol and acetonitrile by laser flash photolysis (LFP) and laser induced opto-acoustic spectroscopy (LIOAS). The excited singlet properties of both dyes were also determined in the two solvents. The LFP determination of the triplet yield was carried out by actinometric determination of the product Phi(T)epsilon(T) and independent estimation of epsilon(T) by the singlet depletion method and by energy transfer using anthracene as energy donor. The results of the three methodologies coincide within the experimental error. The values Of Phi(T) are in the range 0.21-0.50, and in the case of phenosafranine are considerably higher than those previously reported in the literature. An interesting outcome is that the results of LIOAS determination agree with those of LFP within the confidence interval.

引用

页码：115 / 120

页数：6

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