A linear dichroism study of the 1,4-naphthoquinone chromophore
Abstract
The visible-u.v.absorption and linear dichroism spectra of 1,4-naphthoquinone and of several substituted naphthoquinones have been recorded using a nematic liquid crystal as an orientating matrix. The spectra can be satisfactorily interpreted assuming that four transitions are present in the region down to 240 nm. The effect of substituents on the four bands is discussed.