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$Cl^*(^2P_{1/2})$ production dynamics from chloroiodomethane $(CH_2ICl)$ in the ultraviolet
Title:
$Cl^*(^2P_{1/2})$ production dynamics from chloroiodomethane $(CH_2ICl)$ in the ultraviolet
Archive:
Eprints@iisc
Author(s):
Senapati, Dulal
Das, Puspendu K
Das, Puspendu K
Date:
2004-08-01
Abstract:
Dynamics of $Cl^*(^2P_{1/2})$ production from chloroiodomethane dissociation has been investigated in the near ultraviolet $(222leqlambda_exleq304 nm)$. The quantum yield of $Cl^*(^2P_{1/2)}$ production, $phi^*(Cl),$ has been measured by monitoring nascent $Cl(^2P_{3/2})$ and $Cl^*$ concentrations and compared with the quantum yield of $I^*(^2P_{1/2})$ production at the same excitation wavelengths. In the near ultraviolet where most of the transition strength is carried by the $sigma^*(C?I)leftarrown(I)$ transition, the measured $Cl^*$ 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 $sigma^*(C?Cl)leftarrown(Cl)$ transition is less likely at wavelengths $sim$100 nm away from the peak of the C?Cl absorption band.
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Discipline(s):
Inorganic & Physical Chemistry
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Type:
Journal Article
Format:
pdf http://eprints.iisc.ernet.in/secure/00006415/01/sl.no.300-pdf.pdf
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