Molecular Stark-effect spectroscopy of Prodan and Laurdan in different solvents and electric dipole moments in their equilibrated ground and Franck–Condon excited state |
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Institution: | 1. B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, F. Skaryna Ave. 68, 220072 Minsk, Belarus;2. Institute of Physical Chemistry, University of Mainz, Jakob Welder-Weg 11, 55099 Mainz, Germany |
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Abstract: | The results from electrooptical absorption measurements (EOAM) on the ground and excited Franck–Condon state dipole moments of Prodan and Laurdan in 1,4-dioxane and cyclohexane are presented. The ground and excited Franck–Condon state electric dipole moments as well as the respective transition moment of both probes are parallel. The electric dipole moments of Prodan and Laurdan in the ground state in cyclohexane and 1,4-dioxane have values within the range (15.7–16.5) × 10−30 C m. On optical excitation the dipole moments increase by (42.1–49.5) × 10−30 C m. The obtained results are compared with the values of the dipole moments of Prodan and Laurdan determined by other methods. |
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