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Titolo:
Decoding the dynamical information embedded in highly mixed quantum states
Autore:
Keske, JC; Pate, BH;
Indirizzi:
Univ Virginia, Dept Chem, Charlottesville, VA 22901 USA Univ Virginia Charlottesville VA USA 22901 Charlottesville, VA 22901 USA
Titolo Testata:
ANNUAL REVIEW OF PHYSICAL CHEMISTRY
, volume: 51, anno: 2000,
pagine: 323 - 353
SICI:
0066-426X(2000)51:<323:DTDIEI>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
VIBRATIONAL-ENERGY REDISTRIBUTION; INFRARED DOUBLE-RESONANCE; LARGE POLYATOMIC-MOLECULES; INFRARED/INFRARED DOUBLE-RESONANCE; MODE-SELECTIVE PHOTOISOMERIZATION; HIGH-RESOLUTION ABSORPTION; JET-COOLED ALKYLBENZENES; =CH2 HYDRIDE STRETCH; METHYL VINYL ETHER; ACETYLENIC C-H;
Keywords:
rotational spectroscopy; vibrational spectroscopy; intramolecular vibrational energy redistribution (IVR); conformational isomerization; high-resolution infrared spectroscopy;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
154
Recensione:
Indirizzi per estratti:
Indirizzo: Keske, JC Univ Virginia, Dept Chem, Mccormick Rd, Charlottesville, VA 22901 USA Univ Virginia Mccormick Rd Charlottesville VA USA 22901 2901 USA
Citazione:
J.C. Keske e B.H. Pate, "Decoding the dynamical information embedded in highly mixed quantum states", ANN R PH CH, 51, 2000, pp. 323-353

Abstract

The standard description of the vibrational and rotational motion of polyatomic molecules, as expressed by the distortable rotor/harmonic oscillator approximation, provides an adequate description of the molecular quantum states only in regions of low total state density. When the total state density is large, exceeding 100 states/cm(-1), the vibrational dynamics are "dissipative" and the fundamental process of intramolecular vibrational energy redistribution is operative. The presence of intramolecular vibrational energy redistribution leads to molecular quantum states of a qualitatively different nature. With respect to a normal-mode vibrational basis, these quantum states are "highly mixed" in their vibrational character and represent nuclear motion that is a combination of all the normal-mode motions. This review describes frequency domain spectroscopy techniques designed to probe the vibrational, rotational, and structural composition of these eigenstates. Recent work that investigates spectroscopy between highly mixed states isalso reviewed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/07/20 alle ore 09:31:26