TY - JOUR
T1 - The OH radical-H2 O molecular interaction potential
AU - Du, Shiyu
AU - Francisco, Joseph S.
AU - Schenter, Gregory K.
AU - Iordanov, Tzvetelin D.
AU - Garrett, Bruce C.
AU - Dupuis, Michel
AU - Li, Jun
PY - 2006/6/14
Y1 - 2006/6/14
N2 - The OH radical is one of the most important oxidants in the atmosphere due to its high reactivity. The study of hydrogen-bonded complexes of OH with the water molecules is a topic of significant current interest. In this work, we present the development of a new analytical functional form for the interaction potential between the rigid OH radical and H2 O molecules. To do this we fit a selected functional form to a set of high level ab initio data. Since there is a low-lying excited state for the H2 OOH complex, the impact of the excited state on the chemical behavior of the OH radical can be very important. We perform a potential energy surface scan using the CCSD(T)/aug-cc-pVTZ level of electronic structure theory for both excited and ground states. To model the physics of the unpaired electron in the OH radical, we develop a tensor polarizability generalization of the Thole-type all-atom polarizable rigid potential for the OH radical, which effectively describes the interaction of OH with H2 O for both ground and excited states. The stationary points of (H2 O)n OH clusters were identified as a benchmark of the potential.
AB - The OH radical is one of the most important oxidants in the atmosphere due to its high reactivity. The study of hydrogen-bonded complexes of OH with the water molecules is a topic of significant current interest. In this work, we present the development of a new analytical functional form for the interaction potential between the rigid OH radical and H2 O molecules. To do this we fit a selected functional form to a set of high level ab initio data. Since there is a low-lying excited state for the H2 OOH complex, the impact of the excited state on the chemical behavior of the OH radical can be very important. We perform a potential energy surface scan using the CCSD(T)/aug-cc-pVTZ level of electronic structure theory for both excited and ground states. To model the physics of the unpaired electron in the OH radical, we develop a tensor polarizability generalization of the Thole-type all-atom polarizable rigid potential for the OH radical, which effectively describes the interaction of OH with H2 O for both ground and excited states. The stationary points of (H2 O)n OH clusters were identified as a benchmark of the potential.
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U2 - 10.1063/1.2200701
DO - 10.1063/1.2200701
M3 - Article
AN - SCOPUS:33745145460
VL - 124
JO - Journal of Chemical Physics
JF - Journal of Chemical Physics
SN - 0021-9606
IS - 22
M1 - 224318
ER -