Growth and spectroscopy studies of ADP single crystals with l-proline and l-arginine amino acids

Abstract

Ammonium dihydrogen orthophosphate (ADP) single crystals were grown with l-proline and l-arginine amino acids as additives at 4% molar concentrations. X-ray diffractograms, vibrational FT-IR, and Raman and NMR MAS of 31P and 1H spectra of pure and treated compounds were recorded at room temperature and interpreted. A shift of the wavenumbers of some internal modes of both PO 4 and NH 4 tetrahedrons species was observed. At the same time, some characteristic vibrational modes of N–H and C–H bonds of the organic molecules appeared in IR spectra. However, NMR results show a little shift of the resonance of the phosphorus and hydrogen nucleus, associated with some shoulders for this latter. These observations indicate that the host-additives interactions were achieved.