Frequency dependence of EPR signal intensity, 248 MHz to 1.4 GHz.
The electron paramagnetic resonance pulsed free induction decay (FID) of a degassed solution of a triaryl methyl radical, methyl tris(8-carboxy-2,2,6,6-tetramethyl(-d3)-benzo[1,2-d:4,5-d']bis(1,3)dithiol-4-yl) tripotassium salt, 0.2 mM in H2O, was measured at VHF (247.5 MHz) and L-band (1.40 GHz). The calculated and observed FID signal amplitudes (in millivolts) agreed within 1 and 6%, and the ratio of the normalized FID signals at the two frequencies agreed within 5%. The FID decay time constant was 2.7 micros at both frequencies.
Rinard
George A
GA
Department of Engineering and Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado 80208-2436, USA.
Quine
Richard W
RW
Eaton
Sandra S
SS
Eaton
Gareth R
GR
D004578:Electron Spin Resonance Spectroscopy; D008433:Mathematics; D008962:Models, Theoretical