Two Vanadogermanates from 1-Dimensional Chain to 2-Dimensional Network Built from Di-Cd-Substituted Ge–V–O Clusters and Transition Metal Complex Bridges

Abstract

Two novel vanadogermanates [Cd(en)(H2O)2][Cd(en)2][Cd(en)]{[Cd(en)]2[Ge8V12O42.5(OH)5]}·2H2O (1) and [Cd(en)3][Cd(en)]2{[Cd(en)]2[Ge8V12O42(OH)6]}·10H2O (2, en = ethylenediamine) have been hydrothermally synthesized and structurally characterized by elemental analysis, infrared spectroscopy, powder X-ray diffractions, thermogravimetric analysis, UV–vis spectroscopy, and single-crystal X-ray diffractions. Structural analysis reveals that the Ge–V–O cluster anions in the two compounds are derived from the classical saturated {V18O42} cluster by replacing four VO5 square pyramids with four Ge2O7 groups. Especially, the Ge–V–O cluster anion in 2 is a new configuration of Ge–V–O clusters with four Ge2O7 groups and first reported in this work. 1 is the first 1-dimensional (1-D) chain based on the linkage of centrosymmetric dimeric clusters {[Cd(en)]2[Ge8V12O42.5(OH)5]}212– and trinuclearity [Cd3O4(en)4(H2O)2]2– complexes. 2 is an unprecedented 2-D network built from unique {[Cd(en)]2[Ge8V12O42(OH)6]}8– clusters...