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采用稳态吸收光谱、荧光光谱和时间分辨荧光光谱手段研究了不同氯原子取代位置的四苯基卟啉-组氨酸二元体系及其金属锌配合物的光谱性质. 结果表明, 苯环上氯原子取代位置的不同对卟啉的光物理性质有很大影响, 组氨酸的引入对卟啉的激发态性质影响不大. 氯原子间位、对位取代化合物的荧光量子产率和荧光寿命相差不大, 但其邻位取代自由碱卟啉荧光量子产率和荧光寿命比间位、对位化合物低得多, 而对于锌卟啉其结果恰恰相反, 这种特殊性质主要归因于氯原子的空间效应.
The spectroscopic properties of tetraphenylporphyrin-histidine binary systems and their metal zinc complexes with different chlorine atom substitution positions were studied by means of steady-state absorption spectroscopy, fluorescence spectroscopy and time-resolved fluorescence spectroscopy. The results showed that on the benzene ring Different positions of chlorine atoms have a great influence on the photophysical properties of porphyrin, and the introduction of histidine has little effect on the excited states of porphyrin.Phosphorescence quantum yield and fluorescence But its ortho-position replaces the free-base porphyrin fluorescence quantum yield and the fluorescence lifetime is much lower than the meta-position compound, whereas for the zinc porphyrin the opposite is true, this particular property is mainly due to Spatial effects of chlorine atoms.