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Titolo:
Transition state spectroscopy of the I+HI reaction in clusters: Photoelectron spectroscopy of IHI-center dot Ar-n (n=1-15)
Autore:
Liu, Z; Gomez, H; Neumark, DM;
Indirizzi:
Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA Univ Calif Berkeley Berkeley CA USA 94720 pt Chem, Berkeley, CA 94720 USA Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA Univ Calif Berkeley Berkeley CA USA 94720 hem Sci, Berkeley, CA 94720 USA
Titolo Testata:
FARADAY DISCUSSIONS
, volume: 118, anno: 2001,
pagine: 221 - 232
SICI:
1364-5498(2001)118:<221:TSSOTI>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
THRESHOLD PHOTODETACHMENT SPECTROSCOPY; NEGATIVE-ION PHOTODETACHMENT; ANION; DYNAMICS; REGION; I-2(-)CENTER-DOT-AR-N; COMPLEX; SPECTRA; I-2(-);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Neumark, DM Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA Univ Calif Berkeley Berkeley CA USA 94720 keley, CA 94720 USA
Citazione:
Z. Liu et al., "Transition state spectroscopy of the I+HI reaction in clusters: Photoelectron spectroscopy of IHI-center dot Ar-n (n=1-15)", FARADAY DIS, 118, 2001, pp. 221-232

Abstract

We have investigated effects of solvation on the transition state spectroscopy and dynamics of the I + HI reaction by measuring the anion photoelectron (PE) spectra of the clusters IHI- . Ar-n (n = 1-5). Argon clustering results in a successive shift of the PE spectra to lower electron kinetic energies with increasing cluster size. It also leads to significant vibrationalcooling in the PE spectra and facilitates the observation of features associated with symmetric stretch vibrations and hindered rotational motions ofthe transition state complex IHI. The shifts in electron binding energy suggest that the first six argon atoms form a ring around the waist of the IHI- anion, just as in The spacing of the I-2(-) . Ar-n. antisymmetric stretch features evolves with cluster size and is attributed at least in part to perturbation of the IHI- geometry in larger argon clusters. Intensities of features due to hindered rotation are enhanced for larger clusters, possibly due to solvent perturbation of the neutral transition state region.

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Documento generato il 25/11/20 alle ore 00:53:05