By Douglas C. Neckers, William S. Jenks, Thomas Wolff
Content material: Photochemistry of triarylmethane dye leuconitriles / Viktor V. Jarikov and Douglas C. Neckers -- constitution and reactivity of natural intermediates as published through time-resolved infrared spectroscopy / John P. Toscano -- Semiconductor photocatalysis for natural synthesis / Horst Kisch -- Photophysical probes of DNA sequence-directed constitution and dynamics / Catherine J. Murphy
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The potential the sample acquires is determined by the photoelectric current of electrons leaving the sample, the current through the sample holder towards the sample and the flow of Auger and secondary electrons from the source window onto the sample. Due to the positive charge on the sample, all XPS peaks in the spectrum shift by the same amount to higher binding energies. Calibration is done by using the binding energy of a known compound. In Si02-supported catalysts, for example, one uses the binding energy of the Si 2p 3 Photoemission and Auger Spectroscopy 50 I I 1 , 1 I T 1 1 1 I -XPS Mo/SiO, - real catalyst - conducting I 250 !
H. Weinberg, Appl. Surface Sci. 1 (1978) 360. 1291 E. Habenschaden and J. Kuppers, Surface Sci. 138 (1984) L147. P. E. W. , 433-435 (1999) 69. M. W. Niemantsverdriet, Surface Sci. 233 (1990) 355. L. J. Madix, Surface Sci. 48 (1975) 393. P. Zhdanov, J. Pavlicek and Z. Knor, Catal. Rev. - Sci. Eng. 30 (1988) 501. F. Willis, Surface Sci. 89 (1979) 457. M. Szeftel, S. Lehwald, H. S. E. C. Mills, Phys. Rev. Lett. 51 (1983) 268. W. J. M. A. van Santen, Recl. Trav. Chim. Pays-Bas, I 15 (1 996) 486. A.
For an extensive discussion of transition state theory applied to surface reactions we refer to books by Zhdanov  and by Van Santen and Niemantsverdriet (271. The desorption of a molecule M proceeds as follows: (2-19) where is the adsorbed molecule, the superscript refemng to the transition state for desorption If is the equilibrium constant for the excitation of Madsinto the transition state k is Boltzmann's constant h is Planck's constant T is Lhe temperature Mgas is the desorbed molecule in the gas phase.
Advances in Photochemistry by Douglas C. Neckers, William S. Jenks, Thomas Wolff