Intermolecular electron transfer between coumarin dyes and aromatic amines in Triton-X-100 micellar solutions: Evidence for Marcus inverted region

2004 ◽  
Vol 120 (6) ◽  
pp. 2824-2834 ◽  
Author(s):  
Manoj Kumbhakar ◽  
Sukhendu Nath ◽  
Tulsi Mukherjee ◽  
Haridas Pal
Keyword(s):  
Electron Transfer ◽  
Aromatic Amines ◽  
Micellar Solutions ◽  
Intermolecular Electron Transfer ◽  
Inverted Region ◽  
Marcus Inverted Region ◽  
Triton X ◽  
Coumarin Dyes

Photoinduced bimolecular electron transfer from aromatic amines to pentafluorophenyl porphyrin combined with ultrafast charge recombination persistence with Marcus inverted region

2017 ◽  
Vol 19 (7) ◽  
pp. 5658-5673 ◽  
Author(s):  
Yeduru Venkatesh ◽  
Venkatesan Munisamy ◽  
Bheerappagari Ramakrishna ◽  
Pippara Hemant Kumar ◽  
Haraprasad Mandal ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Aromatic Amines ◽  
Charge Recombination ◽  
Inverted Region ◽  
Diffusion Controlled ◽  
Marcus Inverted Region ◽  
And Diffusion

We demonstrated intrinsic, non-stationary and diffusion controlled photo-induced bimolecular electron transfer follow Marcus inverted region.

scholarly journals Concerted proton-electron transfer reactions in the Marcus inverted region

Science ◽  
2019 ◽  
Vol 364 (6439) ◽  
pp. 471-475 ◽  
Author(s):  
Giovanny A. Parada ◽  
Zachary K. Goldsmith ◽  
Scott Kolmar ◽  
Belinda Pettersson Rimgard ◽  
Brandon Q. Mercado ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Rate Constants ◽  
Charge Recombination ◽  
Transfer Reactions ◽  
Inverted Region ◽  
Electron Transfer Reactions ◽  
Proton Coupled Electron Transfer ◽  
Marcus Inverted Region ◽  
A Charge ◽  
Theory Yield

Electron transfer reactions slow down when they become very thermodynamically favorable, a counterintuitive interplay of kinetics and thermodynamics termed the inverted region in Marcus theory. Here we report inverted region behavior for proton-coupled electron transfer (PCET). Photochemical studies of anthracene-phenol-pyridine triads give rate constants for PCET charge recombination that are slower for the more thermodynamically favorable reactions. Photoexcitation forms an anthracene excited state that undergoes PCET to create a charge-separated state. The rate constants for return charge recombination show an inverted dependence on the driving force upon changing pyridine substituents and the solvent. Calculations using vibronically nonadiabatic PCET theory yield rate constants for simultaneous tunneling of the electron and proton that account for the results.

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