Oxidative Dimerization of Ru(III)-EDTA Complex on the Surface of Functionalized Silica Gel
نویسندگان
چکیده
Este trabalho descreve um estudo da reação de ancoramento de H[Ru(III)Cl 2 (H 2 EDTA)].4.5 H 2 O na superfície da sílica gel funcionalizada (SF) com o composto [3-(2aminoetil)aminopropil]trimetoxissilano (AEATS), gerando por meio de ligação amida o composto dimérico (EDTA) 2 Ru 2 (IV,IV) na superfície da sílica modificada. A oxidação da água por esse complexo imobilizado na superfície da sílica foi observada pela formação de O 2 e decréscimo do pH, originando a sílica modificada SF-AEATS/(EDTA) 2 Ru 2 (III 1/2 ,III 1/2 ). Este dímero ancorado foi caracterizado por espectroscopia eletrônica e vibracional e também por espectroscopia de EPR. O comportamento eletroquímico de um eletrodo de pasta de carbono modificado com a sílica SFAEATS/(EDTA) 2 Ru 2 (III 1/2 ,III 1/2 ) também foi estudado.
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