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双安息香缩三乙四胺双核钴硫氰酸根的离子电极研究
引用本文:王秀玲,袁若,徐岚,柴雅琴,孙志勇,黄晓靖,李群芳,赵勤.双安息香缩三乙四胺双核钴硫氰酸根的离子电极研究[J].高等学校化学学报,2004,25(4):633-635.
作者姓名:王秀玲  袁若  徐岚  柴雅琴  孙志勇  黄晓靖  李群芳  赵勤
作者单位:1. 西南师范大学化学化工学院现代分析重点实验室, 重庆 400715; 2. 遵义医学院基础化学教研室, 遵义 563003
基金项目:国家自然科学基金 (批准号 :2 970 5 0 0 1),教育部优秀青年教师资助计划 (批准号 :教人司 2 0 0 2 -4 0 ),重庆市自然科学基金 (批准号 :2 0 0 2 -7477)资助
摘    要:季铵盐型阴离子选择性电极由于其电位选择性往往表现出Hofmeister顺序,故使其应用受到限制,因此,研究呈现反Hofmeister行为的阴离子选择性电极已成为离子电极研究领域中重要的研究方向之一。近年来,人们研制出了以金属配合物为中性载体且呈现反Hofmeister行为的阴离子选择电极,本实验室也分别研究了以Schiff碱金属配合物及二氮杂四烯基金属配合物为载体的碘离子和水杨酸根离子电极,但上述电极多数是以单核金属配合物为载体,以双核金属配合物作为载体的电极则很少。

关 键 词:双安息香缩三乙四胺双核钴  中性载体  离子选择性电极  硫氰酸根  
文章编号:0251-0790(2004)04-0633-03
收稿时间:2003-04-29

Studies on Highly Selective Thiocyanate Electrode Based on Bisbebzoin-semi-triethylenetetraamine Binuclear Cobalt Complex as Neutral Carriers
WANG Xiu-Ling ,YUAN Ruo ,XU Lan ,CHAI Ya-Qin ,SUN Zhi-Yong ,HUANG Xiao-Jing ,LI Qun-Fang ,ZHAO Qin.Studies on Highly Selective Thiocyanate Electrode Based on Bisbebzoin-semi-triethylenetetraamine Binuclear Cobalt Complex as Neutral Carriers[J].Chemical Research In Chinese Universities,2004,25(4):633-635.
Authors:WANG Xiu-Ling  YUAN Ruo  XU Lan  CHAI Ya-Qin  SUN Zhi-Yong  HUANG Xiao-Jing  LI Qun-Fang  ZHAO Qin
Institution:1. Key Laboratory of Modern Analytical Chemistry, College of Chemistry and Chemical Engineering, Southwest Normal University, Chongqing 400715, China; 2. Department of Basic Chemistry, Zunyi Medical College, Zunyi 563003, China
Abstract:A new highly selective thiocyanate PVC membrane electrode based on bisbebzoin-semitriethylenetetraamine binuclear cobalt(Ⅱ) metallic complex Co(Ⅱ)2-BBSTA] as neutral carrier is reported, which displays an anti-Hofmeister selectivity sequence. The electrode exhibits Nernstian potential linear range to thiocyanate from 1.0×10-1 to 1.0×10-6mol/L with a detection limit 8.0×10-7mol/L and a slope of -52.0 mV/dec in phosphorate buffer solution of pH=5.0 at 25 ℃. The response mechanism is discussed in view of the a.c. impedance technique and the UV spectroscopy technique. The electrode based on binuclear cobalt(Ⅱ) compound was used to determine the thiocyanate content in waste water with satisfactory results.
Keywords:Bisbebzoin-semitriethylenetetraamine binuclear cobalt(Ⅱ)  Neutral carrier  Ion-selective electrode  Thiocyanate
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