Oxidative dimerization of Ru(III)-EDTA complex on the surface of functionalized silica gel

Journal of the Brazilian Chemical Society

Codognoto, Lúcia¹  Universidade Estadual de Maringá, Maringá, Brazil¹  Zanichelli, Patrícia Graça¹  Sernaglia, Rosana Lázara¹ 

关键词: Ru(III)-EDTA complex dimerization;    modified silica gel;    silica immobilized ruthenium edta dimer;   

DOI  :  10.1590/S0103-50532005000400020

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

The present paper deals with the reaction of oxidative dimerization of the H[Ru(III)Cl2(H2EDTA)].4.5 H2O complex on the surface of silica gel functionalized (SF) with [3-(2-aminoethyl)aminopropyl]trimethoxysilane (AEATS), generating the dimeric (EDTA)2Ru2(IV,IV) complex immobilized on the surface of this silica through the coordination with amide bonds. The oxidation of water by the anchored dimeric complex proceeded rapidly and was observed by the evolution of O2 and the decrease in pH, yielding the SF-AEATS/(EDTA)2Ru2(III1/2 ,III1/2). This anchored dimer was characterized by electronic, vibrational and EPR spectroscopies. The electrochemical behavior of a modified carbon paste electrode prepared with SF-AEATS/(EDTA)2Ru2(III1/2 ,III1/2) was also studied.

【 授权许可】

Unknown