Photodissociation of isomeric dichloroethylenes in the ultraviolet:Effect of the second chlorine atom substitution on the dynamics

Chandra, Manabendra and Senapati, Dulal and Tak, Manish and Das, Puspendu K (2006) Photodissociation of isomeric dichloroethylenes in the ultraviolet:Effect of the second chlorine atom substitution on the dynamics. In: Chemical Physics Letters, 430 (1-3). pp. 32-35.

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Abstract

We report the $C1^\ast(^2P_{1/2})$ production dynamics in the near-UV dissociation of three isomers (cis-, gem-, and trans-) of dichloroethylene using the conventional resonance enhanced multiphoton ionization technique. Substantial amounts of $C1^\ast$ are produced in the wavelength range 222–304 nm. The $C1^\ast$ quantum yield $(\phi^\ast)$ is maximum at 304 nm for all the isomers and $\phi^\ast_{cis}$ is markedly higher than $\phi^\ast_{gem}$ and $\phi^\ast_{trans}$ except at 222 nm. Existence of both direct and indirect dissociation pathways at these wavelengths complicates the $C1^\ast$ production dynamics. The higher value of $\phi^\ast_{cis}$ originates from a large contribution from direct dissociation via the $(n,\sigma^\ast)$ state.

Item Type:	Journal Article
Publication:	Chemical Physics Letters
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	21 Nov 2006
Last Modified:	19 Sep 2010 04:32
URI:	http://eprints.iisc.ac.in/id/eprint/8955

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