Nk. Petrov et al., STUDY OF PREFERENTIAL SOLVATION IN BINARY SOLVENT MIXTURES BY THE FLUORESCENCE-DETECTED MAGNETIC-FIELD EFFECT, Journal of the Chemical Society. Faraday transactions, 90(1), 1994, pp. 109-111
Citations number
13
Categorie Soggetti
Chemistry Physical","Physics, Atomic, Molecular & Chemical
It has been found that the magnetic field effect detected by fluoresce
nce of the pyrene-N,N-dimethylaniline exciplex in binary liquid mixtur
es containing components of significantly different relative permittiv
ities depends on V-mP(delta(P) - delta(N))(2) values which appear in H
ildebrand's theory. Here V-mP is the molar volume of a polar component
and delta(P), and delta(N), are the solubility parameters of polar an
d non-polar components, respectively. The results suggest that the pre
ferential solvation of radical-ion pairs in mixtures may be affected b
y their concentration fluctuations. The characteristic dimension of po
lar microdomains produced around radical ions was determined by the ma
gnetic-field-effect technique to be ca. 50 Angstrom.