Cl∗(2P½) production dynamics from chloroiodomethane (CH2ICl) in the ultraviolet

Senapati, Dulal ; Das, Puspendu K. (2004) Cl∗(2P½) production dynamics from chloroiodomethane (CH2ICl) in the ultraviolet Chemical Physics Letters, 393 (4-6). pp. 535-538. ISSN 0009-2614

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Dynamics of Cl∗(2P½) production from chloroiodomethane dissociation has been investigated in the near ultraviolet (222≤λex≤304 nm). The quantum yield of Cl∗((2P½) production, φ∗(Cl), has been measured by monitoring nascent Cl(2P3/2) and Cl∗ concentrations and compared with the quantum yield of I∗(2P½) production at the same excitation wavelengths. In the near ultraviolet where most of the transition strength is carried by the σ∗(C-I)← n(I) transition, the measured Cl½ quantum yield decreases as a function of increasing photolysis wavelength. An interchromophore energy transfer mechanism between the C-I and C-Cl chromophores has been proposed to rationalize Cl∗ production since the direct excitation of the σ∗(C-I)← n(Cl) transition is less likely at wavelengths ~100 nm away from the peak of the C-Cl absorption band.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:86344
Deposited On:09 Mar 2012 10:41
Last Modified:09 Mar 2012 10:41

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