Energy Transfer Mechanisms and the Molecular Exciton Model for Molecular Aggregates

1963 ◽  
Vol 20 (1) ◽  
pp. 55 ◽  
Author(s):  
Michael Kasha
Keyword(s):  
Energy Transfer ◽  
Molecular Aggregates ◽  
Exciton Model ◽  
Transfer Mechanisms

scholarly journals Ultrafast Electron/Energy Transfer and Intersystem Crossing Mechanisms in BODIPY-Porphyrin Compounds

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 312
Author(s):  
Yusuf Tutel ◽  
Gökhan Sevinç ◽  
Betül Küçüköz ◽  
Elif Akhuseyin Yildiz ◽  
Ahmet Karatay ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Fluorescence Spectra ◽  
Visible Region ◽  
Energy Transfer Mechanism ◽  
Free Base ◽  
Pump Probe ◽  
Harvesting Efficiency ◽  
Probe Spectroscopy ◽  
Absorption Features ◽  
Transfer Mechanisms

Meso-substituted borondipyrromethene (BODIPY)-porphyrin compounds that include free base porphyrin with two different numbers of BODIPY groups (BDP-TTP and 3BDP-TTP) were designed and synthesized to analyze intramolecular energy transfer mechanisms of meso-substituted BODIPY-porphyrin dyads and the effect of the different numbers of BODIPY groups connected to free-base porphyrin on the energy transfer mechanism. Absorption spectra of BODIPY-porphyrin conjugates showed wide absorption features in the visible region, and that is highly valuable to increase light-harvesting efficiency. Fluorescence spectra of the studied compounds proved that BODIPY emission intensity decreased upon the photoexcitation of the BODIPY core, due to the energy transfer from BODIPY unit to porphyrin. In addition, ultrafast pump-probe spectroscopy measurements indicated that the energy transfer of the 3BDP-TTP compound (about 3 ps) is faster than the BDP-TTP compound (about 22 ps). Since the BODIPY core directly binds to the porphyrin unit, rapid energy transfer was seen for both compounds. Thus, the energy transfer rate increased with an increasing number of BODIPY moiety connected to free-base porphyrin.

scholarly journals Energy transfer mechanisms and resolvent analysis in the cylinder wake

2021 ◽  
Vol 6 (2) ◽  
Author(s):  
Bo Jin ◽  
Sean Symon ◽  
Simon J. Illingworth
Keyword(s):  
Energy Transfer ◽  
Cylinder Wake ◽  
Transfer Mechanisms

Energy transfer mechanisms in mixed systems involving flavins

1978 ◽  
Vol 9 (2) ◽  
pp. 174
Author(s):  
B.B. Kulkarni ◽  
V. Swayambunathan ◽  
K.S.V. Santhanam
Keyword(s):  
Energy Transfer ◽  
Mixed Systems ◽  
Transfer Mechanisms
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