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Frequency Dependence of EPR Signal Intensity, 248 MHz to 1.4 GHz

✍ Scribed by George A. Rinard; Richard W. Quine; Sandra S. Eaton; Gareth R. Eaton

Publisher: Elsevier Science
Year: 2002
Tongue: English
Weight: 59 KB
Volume: 154
Category: Article
ISSN: 1090-7807
DOI: 10.1006/jmre.2001.2455

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✦ Synopsis

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.

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