An investigation of energy transfer between coumarin 35 and xanthene derivatives in liquid medium

Authors : An Investigation Of Energy Transfer Betw Xanthene

Pages : 285-294

Doi:10.3906/sag-1204-80

View : 14 | Download : 7

Publication Date : 9999-12-31

Article Type : Makaleler

Abstract :The energy transfer between coumarin 35 (C35) and pyronin compounds, which are xanthene derivatives, i.e. pyronin B (PyB) and pyronin Y (PyY), in methanol was investigated at room temperature by using steady-state absorption, emission, and time-resolved fluorescence spectroscopy. Fluorescence energy transfer rate constants (kT) and critical radius (R0) were determined for C35-PyB and C35-PyY molecular pairs in methanol. The obtained values of kT and R0 indicated that the dipole-dipole interaction between C35-PyB and C35-PyY molecular pairs accounted for the energy transfer mechanism. The energy transfer efficiency and the distance between the donor and acceptor (r) were also calculated for donor-acceptor pairs using Förster's theory.
Keywords : Fluorescence energy transfer, coumarin 35, pyronin compounds, fluorescence intensity quenching.