Electronic excitation of Rh(super I)(CO)2 species on Al2O3 surfaces: photodissociation of the Rh(super I)-CO bond

Article Abstract:

Research was conducted to examine the photoexcitation of Rh(super I)(CO)2 species on Al2O3 surfaces using infrared and ultraviolet absorption spectroscopy. By monitoring the depletion of the CO moiety, a photodissociation energy threshold between 2.8 and 2.9 eV for the Rh(super I)(CO) bond of the Rh(super I)(CO)2 species was determined. The electronic excitations correlate well with the photon energy dependence of the photodissociation cross section of Rh(super I)(CO)2 species on Al2O3 surfaces.

Research, Aluminum oxide, Dissociation, Dissociation reactions, Transition metal compounds, Nuclear excitation

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Adsorption and decomposition of dimethyl methylphosphonate on TiO2

Article Abstract:

Studies done on the adsorption of dimethyl methylphosphonate (DMMP) and its decomposition on a powdered TiO2 surface by using transmission infrared spectroscopy for different temperature domains are reported. Results reveal that transmission infrared spectroscopy is a powerful method, able to separate surface diffusion, adsorption and dissociation processes for this molecule on TiO2.

Methods, Usage, Infrared spectroscopy, Adsorption, Titanium, Chemical properties

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Monitoring hole trapping in photoexcited TiO2(110) using a surface photoreaction

Article Abstract:

The role of the saturation of the hole traps in TiO2 is investigated using a simple photochemical surface reaction that detects the transport of holes to the surface of a TiO2(110) single-crystalline substrate. The results indicate that the second-order recombination of electrons and holes is a limiting factor in determining the rate of photooxidation processes that occur on TiO2.

Electric properties, Photochemical research, Titanium compounds, Structure

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