Luminescent photoproducts in UV-irradiated ice.
This Account describes the near-UV and visible luminescences emitted from crystalline, polycrystalline, and amorphous ices as a result of excitation by UV light. Vibrationally resolved, short-lived luminescence around 340 nm arises from excited O(2) formed by the reaction of two O atoms. Long-lived luminescence around 420 nm is tentatively assigned to a spin-forbidden (4)sigma(-) --> X(2)Pi transition of OH. This Account gives a history of the research into this little-known phenomenon, places it in the context of other spectroscopic studies of gaseous and solid water, and proposes future directions for the work.
Langford
V S
VS
Department of Chemistry, The University of Western Australia, Nedlands, WA 6907, Australia.
McKinley
A J
AJ
Quickenden
T I
TI
D007053:Ice; D008163:Luminescent Measurements; D014466:Ultraviolet Rays
D007053:Ice