Frontiers in Bioscience-Landmark (FBL) is published by IMR Press from Volume 26 Issue 5 (2021). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on imrpress.com as a courtesy and upon agreement with Frontiers in Bioscience.
The synthesis and characterization by single crystal x-ray structure analysis, manganometric titration, valence sum calculations, thermogravimetric analysis, and IR spectroscopic studies of (HN(CH2CH2)3NH)2(Na(H2O)2)(HV10O28)·2H2O (1) and (H3N-4-C5H4N)2(NH4)4(V10O28)·xH2O (2) has been described. The structure of 1 consists of alternating layers composed of two-dimensional arrays of decavanadate clusters (HV10O28)5- interlinked by the {Na(H2O)2O4} moieties, separated by the doubly protonated DABCO cations-- (HN(CH2CH2)3NH)2+. The structure exhibits a fascinating network of hydrogen bonds between cations, solvate water molecules and anion clusters. The crystal structure of 2 contains three-dimensional arrays of (V10O28)6- cluster anions, protonated 4-aminopyridinium groups, ammonium ions, and water molecules. Crystal data for 1: C12H37N4Na2O32V10, Monoclinic space group C2/m, a = 20.4242(8), b = 8.4550(3), c = 11.9255(5)Å, beta = 122.0500(10)o, Volume = 1745.49(12)(Å3), Z = 2, Dcalc = 2.439 Mg/m3. Crystal data for 2: Triclinic space group Pi, a =14.911(2), b = 16.928(2), c = 39.714(5)Å, a = 84.454(2), (β = 84.895(2), ?= 79.603(2)o, Volume = 9787.4(13) Å3, Z = 8.