Supramolecular complex of a fused zinc phthalocyanine–zinc porphyrin dyad assembled by two imidazole-C60units: ultrafast photoevents

2018 ◽  
Vol 20 (11) ◽  
pp. 7798-7807 ◽  
Author(s):  
Jorge Follana-Berná ◽  
Sairaman Seetharaman ◽  
Luis Martín-Gomis ◽  
Georgios Charalambidis ◽  
Adelais Trapali ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Charge Separation ◽  
Supramolecular Complex ◽  
Zinc Phthalocyanine ◽  
Zinc Porphyrin

A ZnP–ZnPc, fused ZnP–ZnPc dyad is shown to undergo ultrafast energy transfer followed by electron transfer to coordinated fullerene resulting in charge separation.

Formation and photoinduced properties of zinc porphyrin-SWCNT and zinc phthalocyanine-SWCNT nanohybrids using diameter sorted nanotubes assembled via metal-ligand coordination and π–π stacking

2011 ◽  
Vol 15 (09n10) ◽  
pp. 1033-1043 ◽  
Author(s):  
Sushanta K. Das ◽  
Navaneetha K. Subbaiyan ◽  
Francis D'Souza ◽  
Atula S. D. Sandanayaka ◽  
Takatsugu Wakahara ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Steady State ◽  
Rate Constants ◽  
Charge Separation ◽  
Ion Pairs ◽  
Free Energy Calculations ◽  
Zinc Phthalocyanine ◽  
Ir Absorption ◽  
Zinc Porphyrin ◽  
Π Stacking

Photoinduced electron transfer processes in self-assembled zinc porphyrin ( ZnP ) or zinc phthalocyanine ( ZnPc ) with semiconducting (7,6)- and (6,5)-enriched SWCNTs were investigated. To bind photosensitizers to SWCNTs, first, pyrene covalently functionalized with a phenylimidazole (Im-Pyr) entity was treated with SWCNTs. Exfoliation of SWCNTs occurred due to π–π stacking of pyrene with nanotubes walls leaving the imidazole entity that was subsequently used to coordinate ZnP or ZnPc in o-dichlorobenzene (DCB). The donor-acceptor nanohybrids thus formed were characterized by TEM imaging, steady-state UV-visible-near IR absorption and fluorescence spectra. Free-energy calculations suggested possibility of electron transfer from the photoexcited ZnP or ZnPc to Im-Pyr/SWCNT(n,m) in the nanohybrids. Consequently, steady-state and time-resolved fluorescence studies revealed efficient quenching of the singlet excited state of ZnP or ZnPc with the rate constants of charge separation (k CS ) in the range of (3–6) × 109 s-1. Nanosecond transient absorption technique confirmed the electron transfer products, ZnP·+←Im-Pyr/SWCNT·- and ZnPc·+←Im-Pyr/SWCNT·- (and opposite charged pairs) having characteristic absorptions with the decay rate constants due to charge recombination (k CR ) in the range of (1.4–2.4) × 107 s-1, corresponding to lifetimes of radical ion-pairs in the 70–100 ns range. The SWCNT·- was further utilized to mediate electrons to hexyl-viologen dication (HV2+) resulting in an electron-accumulation process in the presence of sacrificial electron donor, offering additional proof for the occurrence of photoinduced charge-separation and potential utilization of these materials in light energy harvesting applications. Further, photoelectrochemical cells have been constructed on FTO/ SnO2 electrodes to verify their ability to directly convert light into electricity. An IPCE efficiency of up to 7% has been achieved in case of ZnP←Im-Pyr/SWCNT modified electrode.

Photoinduced Electron Transfer and Excitation Energy Transfer in Directly Linked Zinc Porphyrin/Zinc Phthalocyanine Composite

2006 ◽  
Vol 110 (47) ◽  
pp. 12734-12742 ◽  
Author(s):  
Fuyuki Ito ◽  
Yukihide Ishibashi ◽  
Sazzadur Rahman Khan ◽  
Hiroshi Miyasaka ◽  
Kazuya Kameyama ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Excitation Energy ◽  
Photoinduced Electron Transfer ◽  
Excitation Energy Transfer ◽  
Zinc Phthalocyanine ◽  
Zinc Porphyrin

Multi-modular, tris(triphenylamine) zinc porphyrin–zinc phthalocyanine–fullerene conjugate as a broadband capturing, charge stabilizing, photosynthetic ‘antenna-reaction center’ mimic

Nanoscale ◽  
2015 ◽  
Vol 7 (15) ◽  
pp. 6813-6826 ◽  
Author(s):  
Chandra B. KC ◽  
Gary N. Lim ◽  
Francis D'Souza
Keyword(s):  
Electron Transfer ◽  
Reaction Center ◽  
Zinc Phthalocyanine ◽  
Zinc Porphyrin ◽  
Donor Acceptor ◽  
Photosynthetic Antenna ◽  
Charge Stabilization

Charge stabilization as a result of electron transfer followed by a hole-shift mechanism is demonstrated in a supramolecular multi-modular donor–acceptor assembly.

scholarly journals Multistep energy and electron transfer processes in novel rotaxane donor–acceptor hybrids generating microsecond-lived charge separated states

2015 ◽  
Vol 6 (12) ◽  
pp. 7293-7304 ◽  
Author(s):  
Sabrina V. Kirner ◽  
Christian Henkel ◽  
Dirk M. Guldi ◽  
Jackson D. Megiatto Jr ◽  
David I. Schuster
Keyword(s):  
Electron Transfer ◽  
Electron Acceptor ◽  
Zinc Phthalocyanine ◽  
Zinc Porphyrin ◽  
Transfer Processes ◽  
Energy And Electron Transfer ◽  
Donor Acceptor ◽  
Electron Transfer Processes

A new set of [Cu(phen)2]+ based rotaxanes, featuring [60]-fullerene as an electron acceptor and a variety of electron donating moieties, namely zinc porphyrin (ZnP), zinc phthalocyanine (ZnPc) and ferrocene (Fc), has been synthesized and fully characterized.

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.

Charge separation and energy transfer in a caroteno–C60dyad: photoinduced electron transfer from the carotenoid excited states

2006 ◽  
Vol 5 (12) ◽  
pp. 1142-1149 ◽  
Author(s):  
Rudi Berera ◽  
Gary F. Moore ◽  
Ivo H. M. van Stokkum ◽  
Gerdenis Kodis ◽  
Paul A. Liddell ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Excited States ◽  
Charge Separation ◽  
Photoinduced Electron Transfer

Energy transfer and charge separation dynamics in photoexcited pyrene–bodipy molecular dyads

2018 ◽  
Vol 20 (2) ◽  
pp. 837-849 ◽  
Author(s):  
M. Fakis ◽  
J. S. Beckwith ◽  
K. Seintis ◽  
E. Martinou ◽  
C. Nançoz ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Charge Separation ◽  
Polar Solvents ◽  
Molecular Dyads

Energy and/or electron transfer is observed in pyrene–bodipy dyads in apolar/polar solvents using fs spectroscopy.

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