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Titolo:
PROTON-TRANSFER DYNAMICS AND CLUSTER ION FRAGMENTATION IN PHENOL AMMONIA CLUSTERS
Autore:
HINEMAN MF; KELLEY DF; BERNSTEIN ER;
Indirizzi:
COLORADO STATE UNIV,DEPT CHEM FT COLLINS CO 80523
Titolo Testata:
The Journal of chemical physics
fascicolo: 6, volume: 99, anno: 1993,
pagine: 4533 - 4538
SICI:
0021-9606(1993)99:6<4533:PDACIF>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
EXCITED-STATE; GAS-PHASE; PICOSECOND; 1-NAPHTHOL; WATER; PHENOL-(NH3)N; COMPLEXES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
17
Recensione:
Indirizzi per estratti:
Citazione:
M.F. Hineman et al., "PROTON-TRANSFER DYNAMICS AND CLUSTER ION FRAGMENTATION IN PHENOL AMMONIA CLUSTERS", The Journal of chemical physics, 99(6), 1993, pp. 4533-4538

Abstract

Excited-state proton transfer dynamics are reported for the phenol(NH3)n cluster system. Excited-state proton transfer is shown to occur for this system by isotopic substitution of the hydroxyl proton and ammonia protons. The observed dynamics slow from 80 to 600 ps upon clusterdeuteration. The effects of cluster vibrational energy and ammonia concentration in the expansion gas are also studied. The results of these experiments are compared with a previous study [Syage and Steadman, J. Chem. Phys. 95, 2497 (1991)] which used a single excitation energy and varied ionization energy. Our experiments indicate that a significant amount of cluster ion fragmentation occurs for this system and caution must be exercised in assigning the decays observed in a given ionmass channel to a particular parent cluster. Due to the difficulties of associating a given decay curve with a cluster of particular mass, a previously proposed model of proton transfer in isolated clusters [Hineman et al., J. Chem. Phys. 97, 3341 (1992)] which details the effect of cluster vibrational energy on the proton transfer rate cannot be applied to the phenol/ammonia system.

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Documento generato il 30/11/20 alle ore 14:42:29