Photoinduced energy and electron transfer in rubrene-benzoquinone and rubrene-porphyrin systems

J.I. Khan, A.S. Abbas, S.M. Aly, A. Usman, V. Melnikov, E. Alarousu, and O.F. Mohammed
Chem. Phys. Lett. 616, 237-242, (2014)

Photoinduced energy and electron transfer in rubrene-benzoquinone and rubrene-porphyrin systems

Keywords

Rubrene-benzoquinone , Rubrene-porphyrin

Abstract

​Excited-state electron and energy transfer from singlet excited rubrene (Ru) to benzoquinone (BQ) and tetra-(4-aminophenyl) porphyrin (TAPP) were investigated by steady-state absorption and emission, time-resolved transient absorption, and femtosecond (fs)–nanosecond (ns) fluorescence spectroscopy. The low reduction potential of BQ provides the high probability of electron transfer from the excited Ru to BQ. Steady-state and time-resolved results confirm such an excited electron transfer scenario. On the other hand, strong spectral overlap between the emission of Ru and absorption of TAPP suggests that energy transfer is a possible deactivation pathway of the Ru excited state.

Code

DOI:  10.1016/j.cplett.2014.10.047

Sources

Website PDF

See all publications 2014