Photophysical properties of safranine and phenosafranine -: A comparative study by laser flash photolysis and laser induced optoacoustic spectroscopy
Photophysical properties of safranine and phenosafranine -: A comparative study by laser flash photolysis and laser induced optoacoustic spectroscopy
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DOI：
10.1016/j.jphotochem.2005.01.010
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发表时间：
2005-07-01
影响因子：
4.3
通讯作者：
Previtali, CA
中科院分区：
文献类型：
--
作者：
Broglia, MF;Gómez, ML;Previtali, CA
用激光闪光光解(LFP)和激光诱导光声光谱(LIOAS)测定了染料藏红和酚藏红在甲醇和乙腈中的三重态量子产率。测定了两种染料在两种溶剂中的激发单重态性质。三重态产率的LFP测定是通过对产物Phi(T)的光度测定、单线态耗尽法和以菲为能量供体的能量转移的独立估计来进行的。三种方法的结果在实验误差范围内一致。Phi(T)的值在0.21-0.50的范围内，并且在酚花红的情况下比文献中报道的要高得多。一个有趣的结果是，LIOAS的测定结果在可信区间内与LFP的结果一致。
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.