Structural insights into two inorganic-organic hybrids based on chiral amino acids and polyoxomolybdates

A new chiral inorganic-organic hybrid with the formula (L-His)(2)(H7CoMo6O24)center dot 6H(2)O (1), based on natural amino acid and Anderson type polyoxomolybdate was synthesized through mild condition. The chiral L-histidine molecules induced chirality to the whole structure through various types of strong and unconventional hydrogen bond (HB) interactions (CH center dot center dot center dot O, NH center dot center dot center dot O and CH center dot center dot center dot pi interactions), as well as bifurcated hydrogen bonds (BHBs) between L-histidine amino acid, hexamer water cluster molecules, and H7CoMo6O24 center dot xH(2)O. Following, important non-covalent CH center dot center dot center dot O interactions is investigated in another chiral inorganic-organic hybrid structure, (L-Pro)(3)(PMo12O40).4.5H(2)O (2), in detail. The CH center dot center dot center dot O hydrogen bonds lead to a chiral network similar to the DNA strands affording a promising candidate to bioinorganic studies. (C) 2017 Elsevier B.V. All rights reserved.