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

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

Photoinduced energy and electron transfer in rubrene-benzoquinone and rubrene-porphyrin systems
Jafar I. Khan, Abdullah Saud Abbas, Shawkat M. Aly, Anwar Usman, Vasily Melnikov, Erkki Alarousu, and Omar F. Mohammed
Chem. Phys. Lett. 616, pp 237-242, (2014)
Jafar I. Khan, Abdullah Saud Abbas, Shawkat M. Aly, Anwar Usman, Vasily Melnikov, Erkki Alarousu, and Omar F. Mohammed
Electron Transfer, Rubrene–benzoquinone, Rubrene–porphyrin
2014

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.
 
 
 
 
 
 
 
 
 


DOI:10.1016/j.cplett.2014.10.047