理论计算Cd(Ⅱ)配合物总稳定常数、分布分数与平均配位数  

Theoretical calculation for total stability constant,distribution fraction and average ligand number of Cd(Ⅱ)complex

作　　者：李海斌[1,2] 邹文生 谢发之[1,2] 翟红侠 李盈盈[1,2] 王亚琴 黄秀秀[1,2] LI Haibin;ZOU Wensheng;XIE Fazhi;ZHAI Hongxia;LI Yingying;WANG Yaqin;HUANG Xiuxiu(Key Laboratory of Functional Molecule Design and Interface Process,Anhui Jianzhu University,Hefei 230601,China;School of Materials and Chemical Engineering,Anhui Jianzhu University,Hefei 230601,China)

机构地区：[1]安徽建筑大学功能分子设计与界面过程重点实验室,安徽合肥230601 [2]安徽建筑大学材料与化学工程学院,安徽合肥230601

出　　处：《高师理科学刊》2022年第12期51-55,共5页Journal of Science of Teachers＇College and University

基　　金：安徽省省级质量工程一般项目(2020jyxm0356);安徽省省级线下课程项目(2020kfkc159);安徽建筑大学校级质量工程项目(2020jy38);安徽建筑大学党建与思政教育课题(2021djszzd03)。

摘　　要：为研究Cd(Ⅱ)配合物的组成与性质,以其稳定常数为数据源,Excel与Origin软件为工具,系统计算Cd(Ⅱ)配合物总稳定常数、分布分数、平均配位数,并解析数据应用.结果表明,Cd(Ⅱ)配合物的总稳定常数大小变化顺序为Cd-氰>Cd-草酸>Cd-氢氧基>Cd-乙二胺>Cd-碘>Cd-氨.分布分数曲线显示,可以用EDA和CN^(-)滴定Cd(Ⅱ),Cd(Ⅱ)的掩蔽剂可以选择CN^(-),OH^(-),EDA,C_(2)O_(4)^(2-).Cd(Ⅱ)平均配位数随着配体浓度对数增大而逐渐增大,但通过平均配位数不能完全判断Cd(Ⅱ)配合物稳定性.In order to study the composition and properties of Cd(Ⅱ)complex,the stability constant was used as the data source,and the total stability constant,distribution fraction and average ligand number of Cd(Ⅱ)complex were calculated with Excel and Origin software systematically,and the application of the above data was analyzed.The results showed that the order of the total stability constant of Cd(Ⅱ)complex was cyanogen > oxalic acid >hydroxyl >ethylenediamine> iodine > ammonia.The distribution fraction curve showed that EDA or CN-can be used as a titrant for the determination of Cd(Ⅱ),and CN^(-),OH^(-),EDA,C_(2)O_(4)^(2-)can be selected as masking agents.The average coordination number of Cd(Ⅱ)increased gradually with the logarithmic increase of ligand concentration,but the average ligand number cannot be used to judge the stability of Cd(Ⅱ)complex completely.

关 键 词：Cd(Ⅱ)配合物 稳定常数 分布分数 平均配位数 ORIGIN软件 

分 类 号：O65[理学—分析化学]