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Titolo:
Intermolecular vibrations of 1-naphthol center dot NH3 and d(3)-1-naphthol-ND3 in the S-0 and S-1 states
Autore:
Henseler, D; Tanner, C; Frey, HM; Leutwyler, S;
Indirizzi:
Univ Bern, Dept Chem & Biochem, CH-3000 Bern 9, Switzerland Univ Bern Bern Switzerland 9 Chem & Biochem, CH-3000 Bern 9, Switzerland
Titolo Testata:
JOURNAL OF CHEMICAL PHYSICS
fascicolo: 9, volume: 115, anno: 2001,
pagine: 4055 - 4069
SICI:
0021-9606(20010901)115:9<4055:IVO1CD>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACID-BASE CHEMISTRY; PROTON-TRANSFER REACTION; PHENOL-AMMONIA CLUSTERS; GAS-PHASE CLUSTERS; EXCITED-STATE; 1-NAPHTHOL AMMONIA; DYNAMICS; WATER; PHENOL-(NH3)N; SPECTRA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
46
Recensione:
Indirizzi per estratti:
Indirizzo: Leutwyler, S Univ Bern, Dept Chem & Biochem, Freiestr 3, CH-3000 Bern 9, Switzerland Univ Bern Freiestr 3 Bern Switzerland 9 Bern 9, Switzerland
Citazione:
D. Henseler et al., "Intermolecular vibrations of 1-naphthol center dot NH3 and d(3)-1-naphthol-ND3 in the S-0 and S-1 states", J CHEM PHYS, 115(9), 2001, pp. 4055-4069

Abstract

Hydrogen-bonded complexes of the photoacid 1-naphthol with NH3 and ND3 were investigated by resonant two-photon ionization, spectral hole burning, and fluorescence spectroscopies. Although the intermolecular vibrations are weak in both absorption and emission, with typical Franck-Condon factors <2%relative to the electronic origin, all six intermolecular modes were identified, namely the hydrogen bond stretch <sigma>, the ammonia torsion tau, two in-plane wags beta (1) and beta (2), and two out-of-plane rocking motions rho (1) and rho (2). Several ammonia torsional excitations were observed.with spacings in good agreement with the S-0- and S-1 state effective torsional barriers derived by Humphrey and Pratt [J. Chem. Phys. 104, 8332 (1996)]. The beta (1), beta (2), and rho (2) vibrational excitations exhibit large (2-8 cm(-1)) torsional splittings, which indicate strong anharmonic coupling with the ammonia internal rotation. The observed Franck-Condon factors of the intermolecular stretching vibration imply a contraction of the O-H. . .N hydrogen bond by approximate to0.01 Angstrom upon S-1<--S-0 excitation, (C) 2001 American Institute of Physics.

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Documento generato il 30/11/20 alle ore 15:30:52