Synthesis, crystal structure and spectroscopic properties of ethanol solvated alpha-Keggin heteropolymolybdate

In this study, the ethanol solvated alpha-Keggin heteropolymolybdate (A) was prepared and characterized by the spectroscopic methods such as single-crystal X-ray diffraction, Uv-vis, FT-IR and photoluminescence methods. Thermal analysis of the compound (A) was performed in the 20-1000 degrees C range in the N-2 atmosphere and electrochemical studies were carried out in the 100-1000 mV/s scan rate range. The ethanol solvated alpha-Keggin compound exhibits three irreversible anodic and cathodic peak potentials. The structure of the Keggin type polyoxometalate compound was solved in trigonal unit cell and R-3 space group with R-final value of 0.0507. The structure of the compound contains H-4[SiMo12O40] molecule and three ethanol solvates. The Hirshfeld surface for H-4[SiMo12O40]center dot 3EtOH was obtained to determine the interaction sites within the crystal structure. A cyclic hydrogen bond pattern was shown by a large number of fused spots in the fingerprint plot and these hydrogen bond contacts link the other symmetry related molecules forming a 3D hydrogen bond networks. Hydrogen bond interactions resulted in the formation of honey comb structure. (C) 2017 Elsevier B.V. All rights reserved.