Local electronic structure of the peptide bond probed by resonant inelastic soft X-ray scattering.
Phys Chem Chem Phys
; 21(24): 13207-13214, 2019 Jun 28.
Article
em En
| MEDLINE
| ID: mdl-31179459
ABSTRACT
The local valence orbital structure of solid glycine, diglycine, and triglycine is studied using soft X-ray emission spectroscopy (XES), resonant inelastic soft X-ray scattering (RIXS) maps, and spectra calculations based on density-functional theory. Using a building block approach, the contributions of the different functional groups of the peptides are separated. Cuts through the RIXS maps furthermore allow monitoring selective excitations of the amino and peptide functional units, leading to a modification of the currently established assignment of spectral contributions. The results thus paint a new-and-improved picture of the peptide bond, enhance the understanding of larger molecules with peptide bonds, and simplify the investigation of such molecules in aqueous environment.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Peptídeos
/
Modelos Químicos
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article