光度法测定N,N’-双(8-喹啉基)丙二酰胺过渡金属配合物的稳定常数  

Determination of Stability Constants of Complexes Formed by N,N’ Bis(8 quinolyl) Malonamide with Transitional Metal Ions by Spectrophotometry

作　　者：刘惠茹[1,2] 黄宁兴[1,2] 

机构地区：[1]惠州大学化学系 [2]暨南大学化学系

出　　处：《暨南大学学报（自然科学与医学版）》1997年第3期73-77,共5页Journal of Jinan University(Natural Science & Medicine Edition)

基　　金：国务院侨务办公室高校重点学科基金;南京大学配位化学研究所国家重点实验室基金

摘　　要：报导用连续变化光度法在非水溶剂ＤＭＦ溶液中测定一种新合成的配体，Ｎ，Ｎ′－ｂｉｓ（８－ｑｕｉｎｏｌｙｌ）ｍａｌｏｎａｍｉｄｅ和４种过渡金属离子Ｃｕ２＋、Ｚｎ２＋、Ｃｏ２＋、Ｎｉ２＋所形成配合物的稳定常数。按其对数值的大小排列有如下顺序：Ｃｕ２＋（５．６２）＞Ｚｎ２＋（４．０３）＞Ｎｉ２＋（３．８２）＞Ｃｏ２＋（３．７９），配合物的配位比为１１．实验表明，它们的稳定性较之在水体系中。Stability constants of the complexes formed by N,N’ (8 quinolyl) malonamide with four transitional metal ions, Cu 2+ ,Zn 2+ ,Co 2+ ,Ni 2+ were determined by continuous changing spectrophotometry in DMF, at 28℃. The order of their logarithmic values is as follows: Cu 2+ (5.26) > Zn 2+ (4.03)> Ni 2+ (3.82) > Co 2+ (3.79). The ligand was found to form 1∶1 complexes with metal ions. Experimental results showed that their thermodynamic stability was greater in DMF than that of similar amide complexes in water.

关 键 词：稳定常数 过渡金属离子 酰胺 配合物 光度法 

分 类 号：O641.4[理学—物理化学] O657.3[理学—化学]