Naslov
Dynamics of stable paramagnetic centers in L-alanine studied by transfer saturation EPR

Autori
Maltar-Strmečki, Nadica ; Rakvin, Boris

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
33rd Annual International Meeting ESR Group RSC and 4th Meeting of European federation of EPR Groups (EFEPR) "Prospects for EPR Spectroscopy in the 21st century" / - Norwich, 2000

Skup
33rd Annual International Meeting ESR Group RSC and 4th Meeting of European federation of EPR Groups (EFEPR) "Prospects for EPR Spectroscopy in the 21st century"

Mjesto i datum
Norwich, Ujedinjeno Kraljevstvo, 10.09.2000. - 14.09.2000

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
alanine; dosimetry; ESR

Sažetak
The stable l-alanine radical was examined by transfer saturation EPR (CW-TSEPR) in the temperature region of fast motion of the methyl group (180 K-320 K). From the obtained spectral line broadening and saturation factors of the spectral intensities it was demonstrated that relaxation rate strongly depends on spectral diffusion mechanism. The temperature dependence of the saturation behavior of CW-TSEPR spectra have been analyzed. It was noted that besides correlation time of the methyl group of stable radical center an additional correlation time should be involved in the relaxation process. This additional correlation time originated from the neighbor methyl groups of the radical centers. The obtained dynamical parameters have been compared with those previously obtained by proton nuclear magnetic resonance (NMR) on undamaged crystals.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA