In:
ChemPhysChem, Wiley, Vol. 21, No. 22 ( 2020-11-17), p. 2564-2570
Abstract:
X‐band (ca. 9 GHz) fluid solution rapid‐scan electron paramagnetic resonance spectra are reported for radicals with multiline spectra and resolution of hyperfine lines as narrow as 30 mG. Highly‐resolved spectra of 3‐carbamoyl‐2,2,5,5‐tetramethylpyrrolidin‐1‐yloxy, diphenylnitroxide, galvinoxyl, and perylene cation radical with excellent signal‐to‐noise are shown, demonstrating the capabilities of the rapid‐scan technique to characterize very small, well‐resolved hyperfine couplings. To acquire high resolution spectra the signal bandwidth must be less than the resonator bandwidth. Signal bandwidth is inversely proportional to linewidth and proportional to scan rate. Resonator bandwidth is inversely proportional to resonator Q. Proper selection of scan rate and resonator Q is needed to achieve resolution of closely‐spaced narrow EPR lines.
Type of Medium:
Online Resource
ISSN:
1439-4235
,
1439-7641
DOI:
10.1002/cphc.202000701
Language:
English
Publisher:
Wiley
Publication Date:
2020
detail.hit.zdb_id:
2025223-7
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