Dipole moments in the ground- and excited state of flavin from molecular relaxation spectroscopy and microwave conductivity

摘要

A combination of molecular relaxation spectroscopy and microwave conductivity experiments on model flavin compounds has resulted in the determination of the dipole moment difference in the ground- and first excited singlet states. The results obtained with both methods were in excellent agreement. The dipole moment in the excited state is only slightly larger than the corresponding ground-state dipole moment. With the literature value of the S{sub}0 dipole moment of 7.8 D, the S{sub}1 dipole moment is then 8.8 D.