1. IR-LD spectroscopic characterization of L-Tryptophan containing dipeptides.
- Author
-
Ivanova BB
- Subjects
- Models, Chemical, Models, Molecular, Nanostructures chemistry, X-Ray Diffraction, Amino Acids chemistry, Dipeptides chemistry, Magnetic Resonance Spectroscopy methods, Peptides chemistry, Spectrophotometry, Infrared methods, Spectroscopy, Fourier Transform Infrared methods, Tryptophan chemistry
- Abstract
IR-spectroscopic and stereo-structural analysis of aromatic l-Tryptophan containing dipeptides l-Tryptophan-l-Tryptophan (Trp-Trp), l-Tyrosine-l-Tryptophan (Tyr-Trp) and cyclo(Trp-Trp) have been carried out by means of solid-state linear-dichroic infrared (IR-LD) spectroscopy of oriented as suspension in nematic liquid crystal solids. The experimental data have been compared with analogous ones of the simple amino acids l-Tyrosnine (l-Tyr) and l-Tryptophan (l-Trp). In cyclo(Trp-Trp), the IR-spectral changes towards the IR-ones of acyclic Trp-Trp have been determined. A theoretical analysis of Tyr-Trp at Hartree-Fock level of theory and 6-31G** basis set is also applied.
- Published
- 2006
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