Premium
Preparation, Properties, and ESCA Characterization of Vanadium Surface Compounds on Silicagel. I
Author(s) -
Horvath B.,
Strutz J.,
GeyerLippmann J.,
Horvath E. G.
Publication year - 1981
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19814831223
Subject(s) - vanadium , chemistry , oxidation state , chlorine , chlorine atom , analytical chemistry (journal) , polar effect , inorganic chemistry , photochemistry , organic chemistry , medicinal chemistry , catalysis
Abstract Binding energies (BE) of 18 pure vanadium compounds (V 2p 3/2 niveau) were measured in selected oxygen and chlorine environments, linearity of BE vs. oxidation states scrutinized and appropriate model compounds chosen as comparative standards. The general trend is an increase of BE with formal oxidation state; in particular, it could be counterbalanced by electron donating/withdrawing ligands on the V atom. A graphical (computerized) background substraction method was utilized to remove an interfering O 1s satellite peak and to enhance accuracy of BE values in surface compounds. BEs of (SiO) 3 VO (I), (SiO) 3 V (II), and (SiO) 3 V(O 2 ) (III) were determined. By comparison to standards positive BE shifts of about 2.1 eV were derived indicating the strong electron withdrawing (“electron sink”) effect of the support on V in surface compounds. This is the first reported ESCA data on a surface peroxo complex, (III). Some implications of the results are also discussed.