Solid-state IR-LD spectroscopy of L-tryptophan-containing dipeptidesL-tryptophyl-L-methionine (H-Trp-Met-OH), L-methionyl-L-tryptophan (H-Met-Trp-OH) and glycyl-L-tryptophan dihydrate (H-Gly-Trp-OH.2H20)

摘要

IR-spectroscopic and structural elucidation of L-tryptophan-containing dipeptides L-tryptophyl-L-methionine (H-Tip-Met-OH), L-methionyl-L-tryptophan (H-Met-Trp-OH)and glycyl-L-tryptophan dihydrate(H-Gly-Trp-OH.2H_2O)by means of solid-state linear dichroic IR- (IR-LD) spectroscopy of orientated colloid suspensions in nematic host isperformed. A correlation structure-spectroscopic property of the latter compound is done, comparing IR-LD and knownsingle crystal X-ray diffraction data. Quantum chemical ab initio and DFT calculations of H-Trp-Met-OH/H_2OandH-Met-Trp-OH/H_2Osystems support is made in addition to the IR-LD spectroscopic analysis.