Two-dimensional infrared investigation of N-acetyl tryptophan methyl amide in solution

Article Abstract:

Various studies are conducted to analyze the linear infrared and two-dimensional infrared (2D IR) spectra in the amide-1 region of the N-acetyl tryptophan methyl amide (NATMA) in different solvents of varying polarity. The results show that the amide unit at the amino end shows a lower transition frequency in methanol, whereas the acetyl end has a much lower frequency in the [D.sub.2]O molecule as compared to the amide end.

Infrared spectroscopy, Tryptophan, Methyl groups, Methyl compounds

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The 2D IR responses of amide and carbonyl modes in water cannot be described by Gaussian frequency fluctuations

Article Abstract:

The time-dependent diagonal peak shape changes in the two-dimensional (2D) infrared (IR) spectra is observed in three separate examples of amide-I' vibrations in [D.sub.2]O and a carbonyl transition. The results have provided new approaches for examining protein-bound water at the residue level.

Spectra, Amides, Gaussian processes, Carbonyl compounds

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