Anisotropic Fluorescence of Polar Molecules in External Electric Field, Dipole Moments of Para-Disubstituted Transstilbenes in the First Excited Singlet State

• Authors: A. Kawski , A. Kubicki
• Languages of publication: EN

Abstracts

EN

The electric dipole moments μ_{e} in the lowest excited singlet state of nine short-lived para-disubstituted trans-stilbenes were determined experimentally based on the effect of the external electric field on the fluorescence anisotropy. The values of μ_{e} obtained from Liptay's theory with the employment of the Onsager effective field are in satisfactory agreement with those calculated based on the solvatochromic effect. In the case of para-substituted trans-stilbenes with the same donor substituent R = N(CH_{3})_{2} in position 4 and different acceptors R' in position 4', the enhancing electron properties of the acceptor are accompanied by the increase in μ_{g} - the dipole moment in the ground state, and μ_{e} - the dipole moment in the excited state. There exists a linear relation between the values of μ_{e} and μ_{g}.

Keywords

EN

33.50.-j

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1991
• Volume: 79
• Issue: 4
• Pages: 457-470

Dates

published

1991-04

received

1990-06-19

Contributors

author

A. Kawski

• Luminescence Research Group, Institute of Experimental Physics, University of Gdańsk, Wita Stwosza 57, 80-952 Gdańsk, Poland

author

A. Kubicki

• Luminescence Research Group, Institute of Experimental Physics, University of Gdańsk, Wita Stwosza 57, 80-952 Gdańsk, Poland