Distribution of cobalt atoms in microporous gallophosphates: first approach by 31P NMR spin echo mapping

Abstract

Three microporous cobaltgallophosphates, IM-6, CoGaPO 4-5 and GCP-EDI2 are characterized by 31P NMR spin echo mapping (SEM) experiments. These original analyses for metallophosphates reveal aggregations of Co in the first sphere of coordination of P (taking into account only T elements (Co, P, Ga)), and complete X-ray diffraction data. This study shows that the paramagnetic effect of Co is more important in CoAPOs than in CoGaPOs.