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

Four tetra-Cd-substituted vanadogermanates (V-Ge-Os) H 2 [Cd(dap) 2 {[Cd(dap)] 4 [Ge 8 V 10 O 38 (OH) 8 }·10H 2 O (1), H[Cd(phen)(H 2 O) 2 2 {[Cd(phen)] 4 Ge 8 V 10 O 39 (OH) 7 }·2H 2 O (2), [Cd(phen) 2 2 {[Cd(phen)] 2 [Cd(dap)] 2 Ge 8 V 10 O 38 (OH) 8 }·2H 2 O (3) and H 2 [Cd(phen) 2 4 {[Cd(phen)] 4 [Ge 8 V 10 O 40 (OH) 6 }{[Cd(phen)] 2 [Cd(H 2 O) 2 2 [Ge 8 V 10 O 38 (OH) 8 }·10H 2 O (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. In this work, four tetra-Cd-substituted vanadogermanates was successfully prepared and characterized. The tetra-Cd-substituted vanadogermanate cluster is a flexible unit, which can be not only decorated by various transition-metal complexes to form different isolated structures, but also bridged by transition-metal complexes to generate an extended 1-dimensional chain. Image 1 • Four unique tetra-Cd-substituted vanadogermanates have been hydrothermally made. • Compound 1–4 represent the second series of tetra-Cd-substituted V-Ge-Os. • Compound 1 is a novel 1-dimensional chain based on tetra-Cd-substituted V-Ge-O cluster. • Compound 3 is an uncommon tetra-Cd-substituted V-Ge-O containing mixed chelating organoamine ligands. • Compound 4 is the first V-Ge-O containing two electrically different tetra-Cd-substituted V-Ge-O clusters in one structure. [ABSTRACT FROM AUTHOR]