PHOTO-THERMAL SPECTROSCOPY OF BENZENE AND PYRIDINE FILMS SUPPORTED ON METAL SURFACES.
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Publisher:Ohio State University
The electronic absorption spectra of physisorbed and chemisorbed pyridine and benzene on metal surfaces have been recorded at temperatures between 8 K and 300 K using a novel photo-thermal spectroscopy. The photo-calorimetric nature of the experiment makes possible the quantitation of absorption cross-section and the determination of surface coverage. The experimental method permits an improvement in signal recovery from noise over other techniques used in the electronic spectroscopy of surfaces and may also be employed to obtain the vibrational spectra surface adsorbates at monolayer coverage. Additional advantages and some disadvantages of the method relative to other techniques for surface spectroscopy will be discussed. The spectra of pyridine and benzene have been obtained on evaporated films of aluminun. Silver, gold and nickel, The results may be interpreted in terms of Surface structure, reorganization of the surface film, chemisorption and physisorption.""
Author Institution: Department of Chemistry, University of Michigan
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