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Electronic spectra of organic-bases adsorbed on the surface of the vanadium-phosphoric catalyst

J. Čurilla and Š. Gerej

Department of Physical and Analytical Chemistry, Faculty of Natural Sciences, P. J. Šafárik University, CS-04167 Košice

 

Abstract: The electronic spectra of basic indicators adsorbed on the dehydroxylated vanadium-phosphoric catalyst were studied. It has been found that the molecules of 4-aminoazobenzene, 4-(4'-tolylazo)-2-methylaniline, 4-phenylazodiphenylamine, and 4-nitroaniline are adsorbed in the ionized acid form while 2-nitroaniline as a basic indicator is not adsorbed in the conjugated acid form. The acidity strength of the surface adsorption centres thus revealed is attributed to the Lewis centres.

Full paper in Portable Document Format: 413a407.pdf

 

Chemical Papers 41 (3) 407–411 (1987)

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