The First Organically Templated Open-Framework Niobium Silicate and Germanate Phases: Low-Temperature Hydrothermal Syntheses of [(C4N2H11)Nb3SiO10] (NSH-1) and [(C4N2H11)Nb3GeO10] (NGH-1)

Abstract

Eight- and six-ring channels built from NbO₆ octahedra and SiO₄ or GeO₄ tetrahedra, respectively, are contained in the structures of the first organically templated niobium silicate and germanate open-framework structures. The organic template (piperazine) occupies a well-defined position at the intersection of the channels.