稳态紫外光谱、荧光光谱和时间分辨荧光光谱显示 ,苯环上氯原子的不同位置对氯苯基锌卟啉 -酪氨酸的光物理性质有很大影响 .紫外吸收光谱中 ,邻、间和对氯取代的 3个化合物都具有典型的 Soret带和 Q带 .其中 Soret带位于 42 3 nm处 ,Q( 0 ,0 )和 Q( 0 ,1 )带分别位于 5 49和 5 90 nm处 .邻位取代化合物的荧光量子产率为 0 .0 5 8,比间位 ( 0 .0 2 41 )、对位 ( 0 .0 2 3 5 )取代化合物的要高得多 .邻位取代化合物的荧光寿命( 3 .1 1 ns)比间位 ( 1 .1 2 ns)和对位 ( 1 .1 1 ns)取代化合物的长 .邻位化合物的这些特性可能归因于取代基之间的空间效应 ;而在间位和对位化合物中 ,重原子效应和吸电子的诱导效应可能起主导作用 . Steady-state UV, fluorescence and time-resolved fluorescence spectra show that the different positions of the chlorine atoms on the phenyl ring greatly affect the photophysical properties of chlorophenyl zinc porphyrin-tyrosine.Ultraviolet absorption spectroscopy And the three compounds substituted with chlorine all have typical Soret and Q bands, in which the Soret band is located at 42 3 nm and the Q (0,0) and Q (0,1) bands are located at 5 49 and 5 90 nm, respectively . The fluorescence quantum yield of ortho substituted compounds was 0.08 8, which was much higher than that of substituted compounds (0. 0241) and para (0. 0235) The fluorescence lifetime (3.11 ns) is longer than the meta (1.12 ns) and para (1.11 ns) substitutions of compounds. These properties of ortho-compounds may be attributed to the difference between the substituents Space effect; and in the meta and para compounds, the heavy atom effect and the electron-attracting effect may play a leading role.