文摘
The 19 new inorganic–organic hybrid compounds based on Keggin, Preyssler and Wells–Dawson types of tungstoheteropolyanions and fairly complete series of essential amino acids were prepared and the structure of these materials investigated on the basis of CHN analysis and multi-spectroscopic investigations (IR, 1HNMR and 13CNMR). Changes in position and shape of asymmetric stretching vibration bands in finger print regions of polyoxometalates (POMs) were identified in all FT-IR spectra. These changes are related to noncovalent interactions between POM surface oxygen atoms and the bio-organic molecules. In reported compounds, 12 natural amino acids out of 20 (i.e., alanine, glycine, glutamine, asparagine, methionine, cysteine, leucine, arginine, threonine, aspartic acid, disodium glutamate) have participated.