TOWARDS THE EXPERIMENTAL-DETERMINATION OF THE FUNDAMENTAL MICROSCOPIC PARAMETERS OF ORGANIC ION-RADICAL COMPOUNDS

The electron transfer integral t, the on-site Coulomb repulsion U and the linear electron-molecular vibration (EMV) coupling constants {gα} are microscopic parameters fundamental in the understanding of the physical properties of organic ion-radical compounds. For those compounds in which the ion-radical molecules are present as quasi-isolated dimers, we demonstrate that all of these parameters may be measured via polarized optical reflectance. The role of U in suppressing the EMV coupling is stressed. © 1979.