title: Theoretical Study of Proton Coupled Electron Transfer Reactions: The Effect of Hydrogen Bond Bending Motion.
abstract: We investigate theoretically the effect of hydrogen bond bending motion on the proton coupled electron transfer (PCET) reaction, using a model system where an intramolecular hydrogen-bonded phenol group is the proton donor. It is shown that, in a two-dimensional (2D) model of the PCET reaction, the bending and stretching vibrational motions are separated, and due to the hydrogen bond configuration and anharmonicity of the potential energy surface, the bending vibration can play a role in the PCET reaction. The results are also compared with two different sets of one-dimensional models (1D-linear and 1D-curved). Due to contributions of the bending motion, the rate constants in the 2D model are larger than those in the 1D-linear model, although the differences between the total rate constants and KIEs for 2D and 1D models are not major. Results from the 1D-curved model lie between the 2D- and 1D-linear models, indicating that it can include some effect of bending motion in reducing the potential energies along the reaction path.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing 100190, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing 100190, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Liu
authors.affiliation: Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing 100190, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Song
authors.affiliation: Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing 100190, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Xu
authors.affiliation: Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing 100190, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Shi
mesh_terms: D003198:Computer Simulation; D004579:Electron Transport; D004583:Electrons; D006860:Hydrogen Bonding; D008956:Models, Chemical; D009038:Motion; D011522:Protons
chemical_list: D011522:Protons