ACCURATE HYDROGEN-BONDING ENERGIES BETWEEN 1-NAPHTHOL AND WATER, METHANOL AND AMMONIA

Accurate hydrogen-bond dissociation energies were determined for gas-phase hydrogen-bonded complexes between 1-naphthol or 1-naphthol-d(3) and H2O, CH3OH, NH3 and ND3, using the stimulated emission pumping-resonant two-photon ionization spectroscopy technique in supersonic jets. The hydrogen-bond dissociation energies obtained for the electronic ground state are D-0 = 2035+/-69 cm(-1) for 1-naphthol . H2O, 2645+/-136 cm(-1) for 1-naphthol . CH3OH, 2680+/-5 cm(-1) for 1-naphthol . NH3 and 2801+/-14 cm(-1) for 1-naphthol-d(3) . ND3, respectively. Upon electronic excitation to the S-1 state the binding energies increase by approximately 8%.