Photodissociation dynamics of CH2ICl at 222, 236, 266, 280, and-304 nm


Autoria(s): Senapati, Dulal; Kavita, K; Das, Puspendu K
Data(s)

12/09/2002

Resumo

Dynamics of I*(P-2(1/2)) formation from CH2ICl dissociation has-been investigated at five different ultraviolet excitation wavelengths, e.g., 222, 236, 266, 280, and similar to304 nm. The quantum yield of I*((2)p(1/2)) production, phi*, has been measured by monitoring nascent I(P-2(3/2)) and I* concentrations using a resonance enhanced multiphoton ionization detection scheme. The measured quantum yield as a function of excitation energy follows the same trend as that of methyl iodide except at 236 run. The photodissociation dynamics of CH2ICl also involves three upper states similar to methyl iodide, and a qualitative correlation diagram has been constructed to account for the observed quantum yield. From the difference in behavior at 236 nm, it appears that the crossing region between the two excited states ((3)Q(0) and (1)Q(1)) is located near the exit valley away from the Franck Condon excitation region. The B- and C-band transitions do not participate in the dynamics, and the perturbation of the methyl iodide states due to Cl-I interaction is relatively weak at the photolysis wavelengths employed in this investigation.

Formato

application/pdf

Identificador

http://eprints.iisc.ernet.in/39355/1/Photodissociation_Dynamics.pdf

Senapati, Dulal and Kavita, K and Das, Puspendu K (2002) Photodissociation dynamics of CH2ICl at 222, 236, 266, 280, and-304 nm. In: Journal of Physical Chemistry A, The, 106 (36). pp. 8479-8482.

Publicador

American Chemical Society

Relação

http://pubs.acs.org/doi/abs/10.1021/jp026021s

http://eprints.iisc.ernet.in/39355/

Palavras-Chave #Inorganic & Physical Chemistry
Tipo

Journal Article

PeerReviewed