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Photochemistry of caged molecules: CD3Cl@Ice Y. Lilach and M. Asschera)

Summary: Photochemistry of caged molecules: CD3Cl@Ice
Y. Lilach and M. Asschera)
Department of Physical Chemistry and The Farkas Center for Light Induced Processes,
The Hebrew University, Jerusalem 91904, Israel
Received 19 December 2002; accepted 2 April 2003
Hydrocarbons formation following UV photo-induced dissociation of CD3Cl trapped and caged
inside thin amorphous solid water ASW layers on Ru 001 has been measured for the first time
under well-defined UHV conditions. Stable products such as C2D6 , CHD3 , CD3CD2Cl, CD3OH
were detected via post-irradiation temperature programmed desorption. Specific reactivity pathways
for the various photo-products were identified based on excitation wavelengths, ASW layer
thickness, and parent molecules initial coverage dependence. Cross sections of (16)
10 19
and (13) 10 20
at 193 nm and 248, respectively, were measured. These
photo-induced phenomena of caged molecules are discussed as a possible mechanism for the
formation of hydrocarbons in interstellar space. 2003 American Institute of Physics.
DOI: 10.1063/1.1577534


Source: Asscher, Micha - Institute of Chemistry, Hebrew University of Jerusalem


Collections: Chemistry