Photoinduced energy and electron transfer in rubrene-benzoquinone and rubrene-porphyrin systems
AuthorsKhan, Jafar Iqbal
Abbas, Abdullah Saud
Aly, Shawkat Mohammede
Mohammed, Omar F.
KAUST DepartmentChemical Science Program
KAUST Solar Center (KSC)
Physical Science and Engineering (PSE) Division
Ultrafast Laser Spectroscopy and Four-dimensional Electron Imaging Research Group
Permanent link to this recordhttp://hdl.handle.net/10754/563832
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AbstractExcited-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.
SponsorsShawkat M. Aly is grateful for the post-doctoral fellowship provided by Saudi Basic Industries Corporation (SABIC). The work reported herein was supported by the King Abdullah University of Science and Technology.
JournalChemical Physics Letters