Analysis of the Electronic Spectra in Polyphenyls

Abstract

Though the spectra in polyphenyIs are often broad and structureIess, the general pattern of these spectr> is very similar to those in polyacene series. The systematic behavior of the a, p , and p bands i n BP-poIyphenyIs can be -explained in terms of simple MO theory with the first order configuration interaction. . The behavior of the p and B bands can also be approximateIy calculated by straightforward exciton theory. The usefuhess of the exciton theory is best demonstrated in the case of m-poIyphenyIs.Platt's notations' are entirely irrelevant since polyphenyls cannot be treated as distorted cyclic polyenes.