Rn. Goyal et A. Rastogi, Linear sweep voltammetry of 9-beta-D-ribofuranosyluric acid 5 '-monophosphate in aqueous and micellar media, COLL SURF A, 160(3), 1999, pp. 261-268
Citations number
31
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Linear sweep voltammetric behaviour of 9-beta-D-ribofuranosyluric acid T-mo
nophosphate (UA-9R-5'-P) has been studied in phosphate buffers of pH 3.0 an
d 7.0 at the pyrolytic graphite electrode in aqueous and micellar media. At
pH 3.0 in the presence of non-ionic and anionic surfactants, UA-9R-5'-P ex
hibited a single well-defined 2e, 2H(+) oxidation peak, whereas in the pres
ence of cationic surfactant (CTAB) the oxidation peak I-a showed a tendency
to split into two peaks indicating that the 2e, 2H(+) oxidation of UA-9R-5
'-P in peak I-a reaction occurs in two le steps. The effect of cationic sur
factant at pH 3.0 is explained on the basis of hydrophobic penetration of c
ationic species in cationic micelles. The products of electrode reaction in
micellar medium were found as alloxan, urea and ribosyl phosphate at pH 3.
0 and ribose, allantoin and 5-hydroxyhydantoin 5-carboxamide at pH 7.0 and
were similar to those observed in aqueous media. (C) 1999 Elsevier Science
B.V. All rights reserved.