Adsorption states and photochemistry of NO2 adsorbed on Au(111)

Article Abstract:

Molecular photochemistry has become the focus of attention since it provides information on adsorbate, surface interactions, energy and charge transfer dynamics and kinetics. A study on the photochemistry of NO2 adsorbed on an Au(111) surface was done using an ultrahigh vacuum system. It has been discovered that NO2 adsorption leads to the formation of chemisorbed NO2, N2O4 which is in direct contact with the surface. Physisorbed N2O4 has been found to dissociate to NO2, NO, and adsorbed atomic oxygen under irradiation at lambda <430 nm.

Chemistry, Physical and theoretical, Physical chemistry, Photochemistry, Nitrogen dioxide

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Photodissociation of a surface-active species at a liquid surface: a study by time-of-flight spectroscopy

Article Abstract:

The use of time-of-flight/quadrupole mass spectrometry (TOF/VMS) in the examination of a liquid surface and its photochemistry is reported. The TOF/VMS spectra of photofragments ejected from the liquid surface into the gas phase were analyzed using model calculations. The surface evaporation of the volatile photoproducts, the kinetics of the radicals in the liquid, the photolysis of the solute and diffusion were all taken into account in the calculations.

Mass spectrometry, Surface chemistry, Surface tension

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Photodissociation cross sections of N2O3 adsorbed on Au(111)

Article Abstract:

An investigation of the photochemistry of N2O3 adsorbed on an Au(111) surface is presented. The wavelength dependence of the photodissociation of N2O3 adsorbed on the Au(111) surface was found to be similar in shape to the absorption spectrum of N2O3 in the gas phase or in a solvent.

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