钴卟啉的合成及其催化性能的研究

本文报导了钴5,15-二(对-取代苯基)八烷基卟啉的合成,并讨论了卟环上不同对苯取代基对叶琳与金属钴配位反应速度的影响规律:推电子基团使反应速度减慢,即 配位反应变的速率方程均为:(-d[H₂P])/dt=k表观[H₂P],取代基的影响效应符合Hammatt方程的线性关系。此外,不同取代基卟啉对中心金属钴催化性能的影响是:推电子基增加催化活性,即 。

SYNTHESIS OF COBALT PORPHYRINS AND THEIR COORDINATION CATALYTIC ACTIVITY

Nine cobalt 5, 15-di(p-substituted phenyl) cctaalkyl porphyrins were synthesized and the effect of para-phenyl substituents on coordination reaction of porphyrins with cobalt salt was studied. It has been shown that the reaction follows the rate expression: -dH₂P/dt=K_obh[H₂P] and the reaction rate is influenced by substituents: , corresponding to the Hammett relationship. The experimental results shown that the presence of electron-donating substituent improvs the catalytic activity of title compound in hydroquinone oxidation reaction.