An EPR analysis of nitroxide spin probes in ethyl alcohol and tetrahydrofuran
D Dadayli, E Uçar, MM Sunnetcioglu, R Sungur
article (Uluslararası, Hakemli) | Yazar(lar): D Dadayli, E Uçar, MM Sunnetcioglu, R Sungur | Yıl: 1999 | Dergi/Kurum: PHYSICS AND CHEMISTRY OF LIQUIDS | İndeks: WOS.SCI | Anahtar Kelimeler: EPR in solutions, line widths — Özet: The solutions of 2,2,6,6-tetramethylpiperidinyloxy (TEMPO), 4-hydroxy-TEMPO (TEMPOL) in ethy
The solutions of 2,2,6,6-tetramethylpiperidinyloxy (TEMPO), 4-hydroxy-TEMPO (TEMPOL) in ethyl alcohol and tetrahydrofurane (THF), 4-amino-TEMPO (TEMPAMINE) in THF were prepared in a concentration range of 0.1 - 10 mM. The EPR (0.3 T) spectra of these samples were recorded at room temperature. Experimental spectra were simulated using high field approximation. For this purpose a FORTRAN program was written and by the use of this program hyperfine coupling constants and intrinsic line widths were determined. Electronic correlation times of the samples were calculated from the line widths and their dependence on the solvent was discussed.