* Address for correspondence: PL-84200 Wejherowo, ul. Gen. W. Sikorskiego 11, Poland. the increments in the dipole moments, A/J, determined for different fluorescent molecules, based on the LippertMataga solvent polarity parameter are much overrated in comparison to the values /ue obtained by electrooptical methods [7-10], In the present paper we determine the dipole moments ,ug and yue of P R ...