Electron and energy transfer in a porphyrin–oxoporphyrinogen–fullerene triad, ZnP–OxP–C60

2020 ◽  
Vol 22 (25) ◽  
pp. 14356-14363 ◽  
Author(s):  
Mandeep K. Chahal ◽  
Habtom B. Gobeze ◽  
Whitney A. Webre ◽  
Paul A. Karr ◽  
Daniel T. Payne ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Pump Probe ◽  
Zinc Porphyrin ◽  
Energy And Electron Transfer ◽  
Probe Spectroscopy

Competitive energy and electron transfer in a newly synthesized supramolecular triad composed of zinc porphyrin, oxoporphyrinogen and C60 has been demonstrated using ultrafast pump–probe spectroscopy.

Ultrafast Energy And Electron Transfer In Conjugated Oligomer-Fullerene Molecules

2001 ◽  
Vol 665 ◽  
Author(s):  
P.A. van Hal ◽  
R.A.J. Janssen ◽  
G. Lanzani ◽  
G. Cerullo ◽  
M. Zavelani-Rossi ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Time Constant ◽  
Transfer Reaction ◽  
Polar Solvent ◽  
Phenylene Vinylene ◽  
Intramolecular Electron Transfer ◽  
Pump Probe ◽  
Energy And Electron Transfer ◽  
Probe Spectroscopy

ABSTRACTThe intramolecular photoinduced energy and electron transfer within a fullereneoligothiophene-fullerene triad with nine thiophene units (C60-9T-C60) and an oligo(p-phenylene vinylene)-fullerene dyad with four phenyl groups (OPV4-C60) is investigated with femtosecond pump-probe spectroscopy with sub-10 fs and 200 fs time resolution in solvents of different polarity. Photoexcitation of the π-conjugated oligomer moiety in the triad and dyad results in an ultrafast singlet-energy transfer reaction to create the fullerene singlet-excited state with a time constant of 150-190 fs, irrespective of the polarity of the medium. In a polar solvent, intramolecular electron transfer occurs from the oligomer moiety to the C60 moiety with a time constant of 10-13 ps as a secondary reaction, subsequent to the ultrafast singlet-energy transfer. The charge-separated state has a lifetime of 50-80 ps and recombines to the ground state.

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 Remote electron and energy transfer sensitized photoisomerization of encapsulated stilbenes

2020 ◽  
Vol 19 (7) ◽  
pp. 976-986
Author(s):  
Ramkumar Varadharajan ◽  
A. Mohan Raj ◽  
V. Ramamurthy
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Energy And Electron Transfer

Energy and electron transfer sensitizers present outside trigger the photoisomerization of encapsulated stilbenes; thus establishing communication between a donor and an acceptor is not arrested by a molecular wall.

On the relation of energy and electron transfer in multidimensional chromophores based on polychlorinated triphenylmethyl radicals and triarylamines

2015 ◽  
Vol 17 (17) ◽  
pp. 11848-11867 ◽  
Author(s):  
Markus Steeger ◽  
Stefanie Griesbeck ◽  
Alexander Schmiedel ◽  
Marco Holzapfel ◽  
Ivo Krummenacher ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Energy And Electron Transfer ◽  
Triphenylmethyl Radicals

Chromophores with many donors and acceptors show electron transfer which is identical to energy transfer.

scholarly journals Solvent-dependent photo-induced dynamics in a non-rigidly linked zinc phthalocyanine–perylenediimide dyad probed using ultrafast spectroscopy

2017 ◽  
Vol 19 (31) ◽  
pp. 21078-21089 ◽  
Author(s):  
Bryan Kudisch ◽  
Margherita Maiuri ◽  
Vicente M. Blas-Ferrando ◽  
Javier Ortiz ◽  
Ángela Sastre-Santos ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Dynamic System ◽  
Ultrafast Spectroscopy ◽  
Light Harvesting ◽  
Zinc Phthalocyanine ◽  
Artificial Light ◽  
Pump Probe ◽  
Energy And Electron Transfer

A solvent dependent pump–probe study on an artificial light harvesting dyad reveals static and dynamic system-bath interactions observed in ultrafast photoinduced energy and electron transfer.

A Look into Plasmonic Energy Transfer in CIGS Solar Cells via Ultrabroadband Femtosecond Pump-probe Spectroscopy

2015 ◽  
Author(s):  
J.X. Li ◽  
S.C. Chen ◽  
A. Yabushita ◽  
S.H. Tang ◽  
D.P. Tsai ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Solar Cells ◽  
Pump Probe ◽  
Cigs Solar Cells ◽  
Probe Spectroscopy
Sign in / Sign up

Export Citation Format

Share Document