State-resolved imaging of CO from propenal photodissociation: Signatures of concerted three-body dissociation

Autor:	Arthur G. Suits, Arghya Dey, Ravin Fernando
Rok vydání:	2014
Předmět:	Chemical kinetics chemistry.chemical_compound chemistry Translational energy Photodissociation Co product General Physics and Astronomy Molecule Rotational–vibrational spectroscopy Physical and Theoretical Chemistry Atomic physics Dissociation (chemistry) Carbon monoxide
Zdroj:	The Journal of Chemical Physics. 140:154301
ISSN:	1089-7690 0021-9606
DOI:	10.1063/1.4870643
Popis:	State-selected DC sliced images of propenal photodissociation show clear signatures of a novel synchronous concerted three-body dissociation of propenal recently proposed by Lee and co-workers to give C2H2 + H2 + CO [S. H. Lee, C. H. Chin, C. Chaudhuri, ChemPhysChem 12, 753 (2011)]. Unlike any prior example of a concerted 3-body dissociation event, this mechanism involves breaking three distinct bonds and yields 3 distinct molecules. DC sliced images of CO fragments were recorded for a range of rotational levels for both v = 0 and v = 1. The results show formation of two distinct CO product channels having dissimilar translational energy distributions with characteristic rovibrational state distributions. The images for CO (v = 0) show a large contribution of slower CO fragments at lower rotational levels (J = 5–25). This slow component is completely absent from the v = 1 CO images. The images for the higher rotational levels of the v = 0 and v = 1 CO are nearly identical, and this provides a basis for de...
Databáze:	OpenAIRE
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