脂溶性酞菁钴(Ⅲ)为载体的高选择性亚硝酸根PVC膜电极  

A Highly Selective Nitrite Sensitive PVC Membrane Electrode Using Lipophilic Phthalocyanine Cobalt(Ⅲ) Complex as the Carrier

作　　者：李俊忠[1] 胡敏[1] 俞汝勤[1] 

机构地区：[1]湖南大学化学化工系,长沙410082

出　　处：《化学学报》1995年第11期1118-1123,共6页Acta Chimica Sinica

基　　金：国家自然科学基金;中国科学院长春应用化学研究所电分析化学开放实验室资助的课题.

摘　　要：以自制的4,4＇,4″,(?)一四特丁基酞菁钴(Ⅱ)为原料合成二氯4,4＇,4″,(?)一四特基酞菁钴(Ⅲ).以此为载体制备PVC膜电极.该电极的电位选择性次序明显不同于Hofmeister次序,其最佳响应斜率为-52mV/PNO_2^-,线性范围为3×～1×10^(-1)mol·dm^(-3)NaNO_2通过改变配合物轴向的配位阴离子,用紫外-可见光谱法对电极的响应机理作了初步探讨.In this paper, dichloride 4,4',4',4''-tetra-tert-butylphthalocyanine cobalt(Ⅲ) was synthesized and incorporated into a PVC membrane. The electrode prepared exhibits a selectivity sequence which is different from the classical Hofmeister pattern. The electrode has a high selectivity for nitrite and exhibits a linear response from 3×105 to 1×10-1mol·dm-3 of nitrite with a slope of -52mV / decade. The response mechanism of the electrode was studied using solvent extraction and UV-Vis spectroscopy by. changing the axial coordination anions of the complex.

关 键 词：酞菁钴 亚硝酸根 PVC膜电极 离子选择性电极 

分 类 号：O613.61[理学—无机化学] O657.15[理学—化学]