Excited state intermolecular proton transfer in matrix isolated β-naphthol/ammonia complexes

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Abstract
The spectroscopy and proton transfer dynamics of matrix isolated β-naphthol⋅(NH3)n, n=1,2...complexes have been studied. The complexes are formed by annealing of β-naphthol/NH3/argon matrices. The annealing studies indicate that the n=3, and probably n=4, complexes undergo excited state intermolecular proton transfer (ESPT), and this assignment is confirmed by comparison of experimental and simulated spectra. Time resolved emission studies indicate that the ESPT time is about 20 ps. These results are discussed in terms of simple tunneling theories.

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