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
cm2
and (1­3) 10 20
cm2
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
I. INTRODUCTION

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

Collections: Chemistry