Nickel(II) complexes with tetraaza macrocycles in the electrocatalytic oxidation of sulfite
作者： M Villagran , J Costamagna , JH Zagal , G Cardenas-Jiron , M Paez
DOI: 10.1080/00958970600559484
关键词:
摘要: The electrocatalytic oxidation of sulfite ( ) in basic medium (pH = 10.2) at [Ni(II)-5,7,12,14-tetramethyldinaphtho[b,i]-1,4,8,11-tetraaza[14]annuleneH]++/glassy carbon (mono-[Ni(II)tmdnTAA]++/GC), and poly-[Ni(II)-5,7,12,14-tetramethyldinaphtho[b,i]-1,4,8,11-tetraaza[14]annuleneH]++/glassy carbon(poly-[Ni(II)tmdnTAA]++/GC) modified electrodes was investigated. Both were characterized by cyclic voltammetry. These show an important catalytic effect for mediated the Ni(III)/Ni(II) redox couple. potential shifted about 570 mV cathodic direction with respect to bare Glassy carbon. amperometric response (I pa) pH = 10.2 phosphate buffer or a carbonate both gives linear correlation between 0.92–1.8 mM mono-[Ni(II)tmdnTAA]++/GC, 0.25–1.50 mM poly-[Ni(II)tmdnTAA]++/GC respectively.
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