Abstract
Abstract The basic electronic quantities of some dichroic dyes, naphthalene derivatives of bicarboxylic acid, have been evaluated theoretically using a semi-empirical INDO (intermediate neglect of differential overlap) Cl (configuration interaction) approach. The theoretical data have been com pared with the experimental results obtained from the absorption and fluorescence measurements of the dyes dissolved in toluene and oriented in liquid crystal 8CB. Additionally, the order parame ters of the dyes in smectic A and nematic phases of 8CB have been determined.
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