化学学报 ›› 1981, Vol. 39 ›› Issue (4): 371-375. 上一篇    下一篇

研究简报

0℃时25%乙醇溶液中[Fe(SCN)n]3-n络合物的稳定性和摩尔消光系数

陈连山1, 赵洪刚1, 何锺林2, 常棉2   

  1. 1. 大连辽宁师范学院化学系;
    2. 大连轻工业学院化工系
  • 发布日期:2013-06-03

STABILITY CONSTANTS AND MOLAR EXTINCTION COEFFICIENTS OF [Fe(SCN)n]3-n COMPLEXES IN 25% ALCOHOL (v/v) SOLUTION AT 0℃

CHEN LIAN-SHAN1, ZHAO HONG-GANG1, HE ZHONG-LIN2, CHANG MIAN2   

  1. 1. Department of Chemistry, Liaoning Teachers College, Dalian;
    2. Department of Chemical Engineering, Dalian College of Light Industry
  • Published:2013-06-03

硫氰酸铁的比色法是早已熟知的课题.业已确认,在水溶液中,铁(Ⅲ)与硫氰酸根生成最大配位数为6的六种络合物[1,2].各络合物呈现分级解离的现象,热力学稳定性较小,因而限制了它在分析化学上的应用.1978年,林谦次郎等[3]报道了在非离子表面活性剂TritonX-100存在下的增敏作用,在波长485nm时测定有色络合物的摩尔消光系数为1.88×104,但对其机理未作详细讨论.在低介电常数的介质中,提高了络合物的热力学稳定性,改变了其各级络合物摩尔消光系数的分配,是可能的原因之一.

In this paper, the stability constants and molar extinction coeffioients of the Fe(SCN)n3-n complexes(n=1~6)in the 25% alcohol(v/v)solution and at 0℃ have been determined by the modified Yatsimirskii's method.