meso-四(对烷氧基苯基)卟啉锌配合物的合成、表征及热力学性质

Synthesis,Characterization and Thermodynamic Properties of meso-Tetrakis-(para-alkoxyphenyl) Zinc Porphyrins

合成得到系列meso-四(对烷氧基苯基)卟啉及其锌配合物的晶体,其结构经1HNMR,UV-Vis和元素分析确证。研究了配合物与吲哚客体的轴向配位热力学性质。结果表明:主体与客体的配位数均为1;不同主体的平衡常数与电子效应和空间效应有关。研究了温度对平衡常数的影响,发现平衡常数随温度升高而降低。根据平衡常数计算了配合过程的热力学参数ΔrH■m,ΔrS■m和ΔrGm■,结果表明反应为放热、熵减过程。

meso-Tetrakis（para-alkoxyphenyl） porphyrins and their corresponding zinc complexes were synthesized as crystals. Molecular structures of all the synthesized compounds were confirmed by 1H NMR,UV-Vis and elemental analysis. Themodynamic properties of the axial coordination between metallo porphyrins and indole were investigated by UV-Vis method. The coordination number is 1. The binding constants of different hosts are related to electron and space of the molecules. The binding constant reduced when the temperature increased. The standard molar enthalpy ΔrHm-,standard molar entropy ΔrSm- and Gibbs free energy were obtained by the binding constant. It is found that the reaction is exothermic and the ΔrSm- is reductive.