摘要
用分光光度法研究了镧系元素离子Ｃｅ（Ⅲ）、Ｐｒ（Ⅲ）的二甲酸橙（简称ＸＯ）螯合物在水溶液及在Ｎ、Ｎ──二甲基甲酰胺（简称ＤＭＦ）影响下热致变色规律，比较了ＤＭＦ对Ｃｅ（Ⅲ）－ＸＯ、Ｐｒ（Ⅲ）－ＸＯ螯合物的溶剂效应．研究表明，随着ＤＭＦ比例增大，体系变色温度逐步下降，热色性逐渐明显，并通过实验验证了镧系元素螯合物热变色机理．
The rules of thermochromism for Ln(Ⅲ)-XO(Ln:Ce. Pr) chelate aqueous solutions under the influence of DMF were researched. We compared the solvent effect of DMF on Ln(Ⅲ)-XO chelates. The temperature of transition color of those systems is lower as the propprtion of DMF increases.The mechanism of thermochromism of Ln(Ⅲ)-XO chelates was confirmed by these experiments.
出处
《南京师大学报（自然科学版）》
CAS
CSCD
1995年第4期71-74,共4页
Journal of Nanjing Normal University(Natural Science Edition)
