Abstract
Abstract Studies of metal complexes of purine and pyrimidine bases and their derivatives have received considerable attention recently.1–15 The present investigation aims to elucidate the proton ionization sites and metal ion binding sites in these ligands in aqueous solution from IR spectroscopic study of these systems in D2O. The method employed consisted of the IR study of the ligands in pure D2O solution in the absence and presence of metal ion at a definite pD value. An Elico pH meter with a mini combination glass and calomel electrode was used to measure the pH of the solution. A Beckman model IR-12 spectrophotometer using a KRS-5 cell with a teflon spacing of 0.1 mm was used for all IR measurements.
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