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用pH电位法及温度系数法证实了混型配合物α-氨基酸-邻菲哕啉-铜(Ⅱ)中的线性自由能、线性焓及线性熵关系。 (一)实验部分 pHS-3型酸度计、501型超级恒温器及恒温滴定池、50μl微量进样器,酸度计、温度计、移液管及容量瓶等均经过校正,邻菲哕啉(Phen)为分析纯试剂,实验的操作方法及铜离子标准溶液的测定参见前文,配体α-氨基酸(αA)的提纯及其离解常数的测定和计算已有报道,若以HL代表氨基酸,其离解常数K_1和K_2分别为
The linear free energy, linear enthalpy and linear entropy of the mixed complex α-amino acid-phenanthroline-copper (Ⅱ) were confirmed by pH potentiometry and temperature coefficient method. (A) Experimental Section pHS-3 pH meter, Model 501 super thermostat and constant temperature titration cell, 50μl micro sampler, pH meter, thermometer, pipette and volumetric flask were calibrated. Phenomenon of Phen ) For the analysis of pure reagents, the experimental method of operation and the determination of standard solutions of copper ions are described above. The purification of α-amino acids (αA) and the determination and calculation of their dissociation constants have been reported. If HL is represented by amino acids, The constants K_1 and K_2 are respectively