Study of stable L-alanine radicals by W-band EPR spectroscopy (CROSBI ID 150139)
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Rakvin, Boris ; Maltar-Strmečki, Nadica ; Kappl, Reinhard ; Hüttermann, Jürgen
engleski
Study of stable L-alanine radicals by W-band EPR spectroscopy
Stable L-alanine radicals, SAR1 and SAR2, induced by gamma-irradiation in the L-alanine crystal have been investigated by Electron paramagnetic resonance (EPR) technique at W-band (94 GHz) frequency. The study provides assignment of radical centers detected by continuous wave EPR, saturation transfer mode, and echo-detected field-sweep EPR at W-band frequencies. The phase memory time, Tm, which was measured simultaneously at X-band (9.5 GHz) and W-band frequencies for different spectral components has been employed to estimate rotation correlation times of CH3 protons and an effective correlation time related to local dynamics of entire SAR1 center at room temperature.
L-alanine ; paramagnetic centers ; spin-relaxation time
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