ISSN:
1572-879X
Keywords:
photooxidation
;
titanium dioxide
;
heterogeneous catalysis
;
imidazole
;
succinimide
;
amino-acids
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The dependence of the formation of NH 4 + and/or NO 3 − ions on chemical structure has been examined in TiO2 photocatalyzed oxidations of various amino acids, amides, and nitrogen-heterocyclic compounds. The primary amino groups and the amide moiety are converted photocatalytically and predominantly to NH 4 + ions, whereas the hydroxylamino group in N-hydroxysuccinimide is photoconverted predominantly to NO 3 − ion. Results show that the nitrogen at the 1-position in imidazole is mainly photoconverted to NH 4 + ion by analogy with the equivalent nitrogen atom in pyrrole; the nitrogen at the 3-position is transformed into NO 3 − ion. Formation of ammonium ions is faster than formation of nitrate ions in all but the N-hydroxysuccinimide substrate.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00807215
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