双金属配合物ZCTC在纯水中的溶解及结晶行为研究  

Study on Dissolution and Crystallization Behavior of Double-metallic Coordination Compounds ZCTC in Water

作　　者：夏宗燕[1] 常新安[1] 陈学安[1] 肖卫强[2] 臧和贵[1] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100124 [2]北京工业大学固体微结构与性能研究所,北京100124

出　　处：《人工晶体学报》2013年第8期1521-1525,共5页Journal of Synthetic Crystals

摘　　要：本文采用平衡法和电导率法分别对双金属配合物ZCTC在纯水中的溶解度和电离程度进行了研究。结果表明，在18～60℃范围内，ZCTC在纯水中的溶解度为4—8（g／100g H2O），并且与温度基本呈线性关系，溶解度温度系数为0．102（g／（100gH，O℃））；在实验浓度范围内，ZCTC在水中大部分电离为Cd2＋、Zn2＋和SCN，但电离程度随浓度增大而明显降低，另外，在实验浓度范围内，溶液中不存在单独Zn2＋或Cd2＋与SCN’形成的配合物或配合离子。在纯水中ZCTC的结晶和稳定性实验表明，ZCTC易从水溶液中析晶，但晶体透明度差，外形不规则；在45℃以下，ZCTC在水中比较稳定，但随着温度的升高，其化学稳定性迅速降低，分解产生相应硫化物沉淀。The solubility and the ionization effect of double-metallic coordination compound ZCTC in water were studied by the dissolution balance method and specific conductance method. The results show that the solubility of ZCTC which changes linearly with temperature in water is 4-8 （g/100gH20） and the solubility coefficient is about 0. 102 （ g/（ 100gH20 ~ ~C ） ） in the temperature range of 18-60 ~C ; ZCTC is mostly ionized to Cd2＋, Zn2~ and SCN, but ionization effect decreases obviously along with the increase of concentration, otherwise, Zn2~ and SCN, or Cd2~ and SCN doesn＇t become any form of complexes or complex ions in the experimental concentration range. The experiments of stability and crystallization of ZCTC in water show that ZCTC crystallizes easily from aqueous solution, but it ＂s transparency is poor and the shape is irregular; below 45 ~C, ZCTC is relatively stable in water, but its chemical stability decreases rapidly along with the temperature rising because of the decomposition producing corresponding sulfide precipitates.

关 键 词：ZCTC 溶解度 电离 结晶 稳定性 

分 类 号：O78[理学—晶体学]