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本文报道了几种金属酞菁化合物的吸收光谱及其特征参数。它们在可见区域内单分子吸收光谱基本是相似的,其最低电子跃迁特征吸收峰λ_(max)在650—700nm范围,其值随溶剂极性增加而略向红移,取代基团不同,对λ_(max)值影响不大,络合金属不同,λ_(max)值略有差别。某些取代酞菁化合物在极性小的溶剂中形成二聚体。它们是无光活性的,不适宜作光敏化剂。本文探讨了有关二聚体的形成与溶剂极性、溶液浓度、取代基团性质及络合金属原子的关系。结果表明二聚体的形成取决于取代基团的性质以及溶剂的介电常数与溶液浓度。最后计算锌酞菁磺酰胺在氯仿与乙醇中,单分子与二聚体的平衡常数K_(eq)=C_D/C_M~2约为～10~6l·mol~(-1)。
In this paper, the absorption spectra of several metal phthalocyanine compounds and their characteristic parameters were reported. Their single-molecule absorption spectra in the visible region are basically similar, the lowest electron-transition characteristic absorption peak λ max in the range of 650-700 nm, its value slightly red-shifted with the increase of solvent polarity, the different groups, The value of λ_ (max) has little effect, and the value of λ_ (max) is slightly different for different metal complexes. Certain substituted phthalocyanine compounds form dimers in less polar solvents. They are matte active and unsuitable as photosensitizers. This article explores the formation of dimer and solvent polarity, solution concentration, the nature of substituent groups and complex metal atoms. The results show that dimer formation depends on the nature of the substituent groups and the dielectric constant of the solvent and the solution concentration. Finally, the equilibrium constants of single molecule and dimer of zinc phthalocyanine sulfonamide in chloroform and ethanol were calculated, K_ (eq) = C_D / C_M ~ 2 was ~ 10 ~ 6l · mol ~ (-1).