Four tetra-Cd-substituted {Ge8VIV10}-based vanadogermanates: Syntheses, crystal structures and magnetic properties

Abstract Four tetra-Cd-substituted vanadogermanates (V-Ge-Os) H2[Cd(dap)2]{[Cd(dap)]4[Ge8V10O38(OH)8]}·10H2O (1), H[Cd(phen)(H2O)2]2{[Cd(phen)]4Ge8V10O39(OH)7}·2H2O (2), [Cd(phen)2]2{[Cd(phen)]2[Cd(dap)]2Ge8V10O38(OH)8}·2H2O (3) and H2[Cd(phen)2]4{[Cd(phen)]4[Ge8V10O40(OH)6]}{[Cd(phen)]2[Cd(H2O)2]2[Ge8V10O38(OH)8]}·10H2O (4) (dap = 1,2 - diaminopropane; phen = 1,10 - phenanthrolinemonohydrate) have been hydrothermally prepared and structurally characterized. Single crystal X-ray structural analyses indicate that all of 1–4 contain uncommon tetra-Cd-substituted V-Ge-O clusters. 1 is a rare one-dimensional chain based on tetra-Cd-substituted V-Ge-O clusters, while 2–4 are unique discrete tetra-Cd-substituted V-Ge-O clusters decorated with different metal-organoamine complexes. Furthermore, the thermal/chemical stability of 1 and 2 as well as the magnetic properties of 1, 2 and 4 were investigated.