Ja. Bartz et al., PHOTODISSOCIATION OF COPPER HEXAFLUOROACETYLACETONATE IN THE CHARGE-TRANSFER ABSORPTION REGION, Journal of physical chemistry, 97(43), 1993, pp. 11249-11252
The combination of ultraviolet laser photolysis and vacuum ultraviolet
photoionization with time-of-flight mass spectrometry experimentally
identifies the primary products of 222- and 252-nm photodissociation o
f copper hexafluoroacetylacetonate, Cu(hfac)2, in a molecular beam. Th
e photolysis produces extensive ligand fragmentation and results in a
number of different copper-containing species. One of the fragments, C
u(hfac), appears over a period of about a microsecond after the photol
ysis pulse. None of the fragments has a large translational energy. Fo
r example, about 2% of the available energy appears as kinetic energy
of the Cu(hfac) fragment. The extensive ligand loss and slow decay are
consistent with ligand fragmentation causing large contaminations in
photolytically deposited Cu films from Cu(hfac)2 and caged recombinati
on inhibiting photoreduction of Cu(hfaC)2 in solution.