不对称五氮齿类卟啉镉的合成及电子吸收光谱特性研究

本文报道几种不对称类卟啉镉(Ⅱ)配合物的合成及其结构表征,并对其电子吸收光谱特性进行了研究。结果表明,这类配合物的0-0跃迁在λ_max>690nm有一个允许跃迁的强吸收带,且随π电子数及取代基的不同有着明显差别;在强极性溶剂中,该类配合物可发生H聚集;将跃迁能量、振子强度等性质与取代基Hammett常数进行线性相关,揭示了取代基效应对0-0跃迁的影响规律。

SYNTHESIS OF ASYMMETRIC PENTAAZADENTATE PORPHYRIN-LIKE CADMIUM COMPLEXES AND STUDIES OF THEIR ELECTRONIC ABSORPTION SPECTRAL PROPERTIES

ln this paper,the synthesis and characterization of several asymmetric porphyrin-like cadmium complexes and their electronic absorption spectral properties are reported.Studies on their absorption spectra show that these complexes exhibite a strong 0-0 transition band at near infrared region,the number of πelectrons and substituents on ρ-position of bezene ring can inflence this band remarkably.H-aggregation occured in strong polar solvents. The linear correlations of Hammett constants with the 0-0 transition energies,and the ratios of the oscillator strengh hare used to probe the conjugated interaction between π electron of macrocycles and metal ion of complexes with the substituents.