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

被引：4

作者：

Rakvin, Boris ^{[1
]}

Maltar-Strmecki, Nadica ^{[2
]}

Kattnig, Daniel ^{[3
]}

Grampp, Guenter ^{[3
]}

机构：

[1] Rudjer Boskovic Inst, Zagreb 10002, Croatia

[2] Univ Zagreb, Fac Vet Med, Zagreb 10002, Croatia

[3] Graz Univ Technol, Inst Phys & Theoret Chem, A-8010 Graz, Austria

来源：

MOLECULAR PHYSICS | 2007年 / 105卷 / 15-16期

关键词：

L-alanine; paramagnetic centres; electron nuclear double resonance; spin-lattice; relaxation time;

D O I：

10.1080/00268970701616048

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The dynamic properties of the stable L-alanine radicals SAR1 and SAR2 induced by gamma- 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.

引用

页码：2087 / 2094

页数：8

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