Naslov
ENDOR study of the dynamic properties of stable paramagnetic centres in γ -irradiated L-alanine crystals

Autori
Rakvin, Boris ; Maltar-Strmečki, Nadica ; Kattnig, Daniel ; Grampp Gűnter

Izvornik
Molecular Physics (0026-8976) 105 (2007), 15-16; 2087-2094

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
L-Alanine; Paramagnetic centres; Electron nuclear double resonance; Spin-lattice

Sažetak
The dynamic properties of the stable L-alanine radicals SAR1 and SAR2 induced by γ -irradiation of a L-alanine crystal have been investigated using the electron nuclear double resonance technique (ENDOR). The study was focused on the dynamic properties of these centres in the temperature range from 180 to 320 K. In this region, the motion of the NH3+ and CH3 groups exhibits slow and fast motional dynamics in comparison with the nuclear and electron Larmor frequencies, respectively. The correlation rotation times of the CH3 and NH3+ groups of the SAR2 CH3 group and the neighbouring CH3 group of the SAR1 paramagnetic centre were estimated from the spectral line broadening and spectral intensity.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

POVEZANOST RADA