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10 September 2015 Controlling electron transfer in condensed phase with bond-specific infrared excitation
Milan Delor, Paul A. Scattergood, Igor V. Sazanovich, Theo Keane, Gregory M. Greetham, Anthony J. H. M. Meijer, Michael Towrie, Anthony W. Parker, Julia A. Weinstein
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Proceedings Volume 9549, Physical Chemistry of Interfaces and Nanomaterials XIV; 95490U (2015) https://doi.org/10.1117/12.2189056
Event: SPIE Nanoscience + Engineering, 2015, San Diego, California, United States
Abstract
Using an ultrafast electronic-vibrational pulse-sequence, we show that the outcome of light-induced ET can be radically altered by mode-specific infrared (IR) excitation of vibrations which are coupled to the ET-pathway. IR-control is particularly challenging in condensed phase systems due to the ultrafast timescales involved, in particular rapid intramolecular vibrational redistribution. We demonstrate how an IR-pulse following UV-excitation perturbs nuclear-electronic (vibronic) interactions within a donor-bridge-acceptor system similar in design to those utilized in (bio)chemical light-harvesting, and alters charge-transport pathways and product state yields.
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Milan Delor, Paul A. Scattergood, Igor V. Sazanovich, Theo Keane, Gregory M. Greetham, Anthony J. H. M. Meijer, Michael Towrie, Anthony W. Parker, and Julia A. Weinstein "Controlling electron transfer in condensed phase with bond-specific infrared excitation", Proc. SPIE 9549, Physical Chemistry of Interfaces and Nanomaterials XIV, 95490U (10 September 2015); https://doi.org/10.1117/12.2189056
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KEYWORDS
Ultrafast phenomena
Infrared radiation
Bridges
Infrared spectroscopy
Absorption
Transition metals
Visible radiation
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