Effect of the Solvent on the ESR Parameters of Copper Acetylacetonate

Abstract

The study of the ESR spectra parameters of Cu(Acac)2 in different solvents shows that the anisotropy of the nuclear hyperfine interaction tensor varies with changes in solvent. The effect is most clearly exhibited by the parameter A⊥. A correlation is obtained between the spectral data and the nature of the solvent ligand. The results are in agreement with the empirical parameters DII,I of Selbin and DN of Gutmann. Our empirical parameter is also a moderately sensitive one for ranking solvents.