ISSN:
1572-8927
Keywords:
ESR
;
spin exchange
;
hydrophobic interaction
;
nitroxide
;
spin probe
;
mixed solvents
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Electron spin exchange rate constants and hyperfine coupling constants have been measured for two nitroxide spin probes in a number of isoviscous mixed solvents. Collision rate constants, normalized to 1 cP, are lower for solvents in which the major component is water. Further anomalies in the coupling constant for the systemtert-butanol-water are explained in terms of the marked concentration fluctuations known to occur in this solvent mixture. Substitution of a hydrophobic spin probe by one containing an −OH group leads to lowering of the spin exchange rate, possibly due to solvation of the probe.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00655375
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