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Titolo:
Controlling bond cleavage and probing intramolecular dynamics via photodissociation of rovibrationally excited molecules
Autore:
Bar, I; Rosenwaks, S;
Indirizzi:
Ben Gurion Univ Negev, Inst Appl Res, IL-84105 Beer Sheva, Israel Ben Gurion Univ Negev Beer Sheva Israel IL-84105 4105 Beer Sheva, Israel Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel Ben Gurion Univ Negev Beer Sheva Israel IL-84105 4105 Beer Sheva, Israel
Titolo Testata:
INTERNATIONAL REVIEWS IN PHYSICAL CHEMISTRY
fascicolo: 4, volume: 20, anno: 2001,
pagine: 711 - 749
SICI:
0144-235X(200110/12)20:4<711:CBCAPI>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
VIBRATIONALLY MEDIATED PHOTODISSOCIATION; 1ST ABSORPTION-BAND; TO-STATE PHOTODISSOCIATION; PHOTOFRAGMENT TRANSLATIONAL SPECTROSCOPY; DISPERSED FLUORESCENCE-SPECTRA; METASTABLE TRIPLET ACETYLENE; ATOM FORMATION DYNAMICS; ORBIT BRANCHING RATIO; 193 NM; C-H;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
180
Recensione:
Indirizzi per estratti:
Indirizzo: Bar, I Ben Gurion Univ Negev, Inst Appl Res, POB 1025, IL-84105 Beer Sheva, Israel Ben Gurion Univ Negev POB 1025 Beer Sheva Israel IL-84105 , Israel
Citazione:
I. Bar e S. Rosenwaks, "Controlling bond cleavage and probing intramolecular dynamics via photodissociation of rovibrationally excited molecules", INT R PH CH, 20(4), 2001, pp. 711-749

Abstract

Photodissociation studies of vibrationless ground state molecules pervade diverse areas of chemical physics, while those of rovibrationally excited molecules are expected to have even more impact due to the additional fascinating possibilities they offer and the new horizons they open. Photodissociation of rovibrationally excited species involves a double-resonance schemein which a photodissociative transition is initiated from an excited rovibrational state that might Substantially affect the intensity and wavelengthdependence of the photoabsorption spectrum. In favourable cases, when the energy is disposed in vibrations that are strongly coupled to the reaction coordinate, this pre-excitation might influence photodissociation pathways and lead to selective bond cleavage. In other cases it might influence the branching ratio between different fragments by altering the photodissociation dynamics. Moreover, the photodissociation of rovibrationally excited species can serve as a sensitive means for detection of weak vibrational overtone transitions of jet-cooled molecules, and therefore a promising way for revealing specific couplings and time evolution of the prepared vibrationalstates. Experimental studies on different polyatomics are used to demonstrate the above aspects and to show how the mechanism of chemical transformations and the nature of rovibrationally excited states are highlighted by photolysis of these pre-excited molecules.

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Documento generato il 22/09/20 alle ore 19:55:44