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Updated: May 29, 2025

Purification of Active Photosystem I-Light Harvesting Complex I from Plant Tissues
Published on: February 3, 2023
Barrierless Electron Transfer in a Photosynthetic Reaction Center Model
Tobias Ullrich1,2, Ivana Ramírez-Wierzbicki3,4, Leonardo D Slep3,4
1Department Chemie und Pharmazie, Physikalische Chemie Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058, Erlangen, Germany.
Abstract:
Vibrational spectroscopy is the ultimate tool to reveal whether any donor-acceptor system is truly delocalized and therefore characterized by a single-welled potential energy surface, or if it is marginally localized with a barrier that defines two minima. Our femtosecond IR absorption investigations on cyanide-bridged mixed valence systems show a broad, intense and downshifted CN vibration signature, revealing, for the first time, an asymmetric, fully delocalized Class III photoinduced mixed valence system.
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