| 取代四苯基卟啉锌与金属Schiff碱配合物轴向配位反应的热力学研究 |
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| 引用本文： | 陈红卫,朱志昂,阮文娟,张智慧,陈正华,陈荣悌.取代四苯基卟啉锌与金属Schiff碱配合物轴向配位反应的热力学研究[J].化学学报,1997,55(4):380-385. |
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| 作者姓名： | 陈红卫 朱志昂 阮文娟 张智慧 陈正华 陈荣悌 |
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| 作者单位： | 南开大学化学系 |
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| 基金项目： | 国家自然科学基金，天津市自然科学基金，南开大学吸附分离功能高分子材料国家重点试验室等资助的课题. |
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| 摘 要： | 用紫外-可见光谱和Rose-Drago数据处理方法对多种新型空间不对称含咪唑基团金属Schiff碱配合物与取代四苯基卟啉锌ZnT(p-X)PP]轴向配位反应平衡常数进行了测量。研究了配体和卟啉上取代基、反应温度等因素对平衡常数的影响, 发现各配体与锌卟啉配位反应的平衡常数与卟啉环上取代基的Hammett参数之间存在线性自由能关系。在二氯甲烷中, 利用温度系数法测量了反应体系的△rHm^○和△rsm^○。
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| 关 键 词： | 紫外分光光度法 锌络合物 平衡常数 席夫碱 卟啉 络合反应 |
Thermodynamic study of coordination reactions of parasubstituted zinc tetraphenylporphyrins with metallic Schiff base complexes |
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| CHEN HONGWEI,ZHU ZHIANG,RUAN WENJUAN,ZHANG ZHIHUI,CHEN ZHENGHUA,CHEN RONGTI.Thermodynamic study of coordination reactions of parasubstituted zinc tetraphenylporphyrins with metallic Schiff base complexes[J].Acta Chimica Sinica,1997,55(4):380-385. |
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| Authors: | CHEN HONGWEI ZHU ZHIANG RUAN WENJUAN ZHANG ZHIHUI CHEN ZHENGHUA CHEN RONGTI |
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| Abstract: | Equilibrium constants for reactions of ZnT (p-X)PP (parasubstituted zinc tetraphenylporphyrins) with ligands of Schiff base complex in CH2Cl2 and several other solvents have been measured by visible spectral techniques, and determined by the method of Rose-Drago. Electronic effects in metalloporphyrins and effects of ligands, temperature and solvents were researched. It was found that the equilibrium constants for reactions of ZnT (p-X)PP with ligands follow Hammett equation. The enthalpies and the entropies of reactions were obtained from the plots of lnK^○ vs. 1/T. |
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| Keywords: | ULTRAVIOLET SPECTROPHOTOMETRY ZINC COMPLEX EQUILIBRIUM CONSTANT SCHIFF BASE PORPHYRIN COMPLEX REACTION |
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