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• W2065867601 abstract "The potential energy (PE) surface of the lowest excited singlet state relevant to the photophysics of interconversion of the 2-hydroxypyridine/2 (1H)-pyridinone (2HP/2PY) system is characterized by ab initio calculations. The geometry optimizations in the S1 state performed at the CIS/6–31G (d,p) level confirm the experimental findings that the 2HP form is planar in this state whereas the 2PY form is significantly out-of-plane distorted. The lowest-energy first-order saddle-points which are relevant to the photophysics of the “mobile” hydrogen atom on the S1 PE surface lead toward its dissociation from the molecule. There is no saddle-point for a “direct” proton transfer reaction on the S1 PE surface leading from the 2HP form to the 2PY form. The results confirm the hypothesis that the photo-induced dissociation-association (PIDA) mechanism is probably responsible for the excited-state tautomerization observed in this system." @default.
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• W2065867601 date "1996-12-01" @default.
• W2065867601 modified "2023-09-27" @default.
• W2065867601 title "An ab initio study of the potential energy surface in the S1 state of 2-hydroxypyridine" @default.
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• W2065867601 doi "https://doi.org/10.1016/s0301-0104(96)00237-6" @default.
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