Polymeric Acetate-Selective Electrodes Based on meso-( ¥á,¥á,¥á,¥á)-Tetrakis-[(2-arylphenylurea)phenyl]porphyrins: Electronic and pH Effects

Bulletin of the Korean chemical society

Kiju Song¹  Seungwon Jeon¹  Hyo Kyoung Lee¹  Hyung Ran Seo¹ 

关键词: Polymeric membrane;    Urea-functionalized porphyrin;    Acetate ion;    Ion-selective electrode;    Neutral ionophore;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Polymeric membrane electrodes for acetate anion based on meso-( �?,�?,�?,�?)-5,10,15,20-tetrakis[2-(penta-fluorophenylurea) phenyl]porphyrin I and similar urea-functionalized porphyrins �?-�? as neutral ionophores were prepared. The membrane based on porphyrin I exhibits the best potentiometric properties in pH 6.0 rather than pH 7.0: linear stable response over a wide concentration range (6.0 �?10^-5-1.0 �?10^-2 ) with a slope of -59.6 mV/decade and a detection limit of log[CH₃COO^- ] = -5.32. Selectivity coefficients obtained from the matched potential method (MPM) in pH 6.0 indicate that interferences of hydrophobic anions are very small for the membranes of porphyrins I and �? having the strong withdrawing group. The electronic effect of urea-functionalized porphyrins and pH effect of buffer solutions are discussed on the potentiometric response.

【 授权许可】

Unknown