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Quantum yield of Cl* (2P1/2) production in the gas phase photolysis of CCl4 in the ultraviolet

Tak, Manish and Chandra, Manabendra and Senapati, Dulal and Das, Puspendu K (2006) Quantum yield of Cl* (2P1/2) production in the gas phase photolysis of CCl4 in the ultraviolet. In: Journal Of Chemical Sciences, 118 (4). pp. 341-344.

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Abstract

In this paper, we have probed the dynamics of chlorine atom production from the gas phase photodissociation of carbon tetrachloride at 222 and 235 nm. The quantum yield, phi* of Cl* (P-2(1/2)) production has been determined by probing the nascent concentrations of both excited (P-2(1/2)) and ground state (P-2(3/2)) chlorine atoms by suitable resonance-enhanced multiphoton ionization (REMPI) detection schemes. Although at the photolysis wavelengths the absorption of carbon tetrachloride is weak, significant amounts of Cl* are produced. Surprisingly, the quantum yield of Cl* production does not follow the absorption spectrum closely, which gives rise to the possibility of an indirect dissociation mechanism present in CCl4 along with direct dissociation at these ultraviolet wavelengths.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Indian Academy of Sciences.
Keywords: ultraviolet photolysis;carbon tetrachloride;gas phase; resonance enhanced multiphoton ionization;quantum yield; Chemistry,Multidisciplinary
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 21 Feb 2010 09:39
Last Modified: 19 Sep 2010 05:02
URI: http://eprints.iisc.ernet.in/id/eprint/18498

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