Abstract
Potential energy (PE) curves for intramolecular proton transfer in the ground (GSIPT) and intramolecular proton transfer in the excited (ESIPT) states of 3-hydroxychromone (3HC) have been studied using DFT-B3LYP/6-31G(d,p) and TD-DFT/6-31G(d,p) level of theory, respectively. Our calculations suggest the non-viability of GSIPT in 3HC. Excited states PE calculations show the existence of ESIPT process in 3HC. ESIPT in 3HC has also been explained in terms of HOMO and LUMO electron densities of the enol and keto tautomers of 3HC.
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