Rl. Deleon et al., SPECTROSCOPIC CHARACTERIZATION OF INORGANIC HOST-ORGANIC DOPANT FILMSFABRICATED VIA LASER-ASSISTED MOLECULAR-BEAM DEPOSITION, Journal of physical chemistry, 100(25), 1996, pp. 10707-10709
Thin films of hybrid inorganic:organic composites [TiO2:copper phthalo
cyanine, Al2O3:6-propionyl-2-(dimethylamino)naphthalene, and Al2O3:rho
damine 6G] were fabricated by mixing the constituents in the gas phase
via the technique of laser-assisted molecular beam deposition. These
films were characterized by UV-visible, infrared, and steady-state flu
orescence spectroscopic techniques. UV-visible and infrared spectra of
TiO2:copper phthalocyanine films indicate that the organometallic com
pound, copper phthalocyanine, is trapped within the host TiO2 matrix w
ithout degradation. The local microenvironment of the organic componen
ts in these composite films were studied by steady state fluorescence
spectroscopy. Emission spectra indicate that the organic dye molecule,
rhodamine 6G, is trapped within the Al2O3 matrix as the monomer witho
ut aggregation. The spectral red shift of the emission peak and the fu
ll width at the half maximum suggest the environmentally sensitive pro
be, 6-propionyl-2-(dimethylamino) naphthalene, molecules are embedded
within the Al2O3 matrix as opposed to being adsorbed on the Al2O3 surf
ace.