The electrosorption of 1,2,3‐triazole on gold as studied with surface‐enhanced Raman spectroscopy

Abstract

The electrosorption of 1,2,3-triazole on a polycrystalline gold electrode has been studied with surfaceenhanced Raman spectroscopy (SERS) and cyclic voltammetry. Vibrational wavenumbers were calculated for the 1H-and 2H-1,2,3-triazole at the B3LYP and MP2 levels using 6-31G * basis set. The data obtained from vibrational wavenumber calculations are used to analyze the SERS spectra. Results imply a tilted orientation of the triazole molecule both from acidic and neutral perchlorate solution with a nitrogen atom interacting directly with the gold surface. Strong adsorption in both cases is also evident from cyclic voltammograms of polycrystalline gold electrodes, indicating strong inhibition of gold hydroxide formation.

Recent Advances in linear and nonlinear Raman spectroscopy I

“…Reference 26 reports on the analysis of 5-fluorouracil in saliva using SERS. 30 The electrosorption of 1,2,3-triazole on gold 31 and NO on cold-deposited Cu 32 as well as imidazole adsorbed on electrode and colloidal surfaces of Cu, Ag, and Au 33 were further interesting studies. A vibrational characterization of E102 food additive by Raman and SERS, including theoretical studies was performed by Peica et al 28 Kudelski et al 29 report on their study of monolayers of the sulfur-containing molecules 3,3 0thiodipropionic acid and 3-mercaptopropionic acid adsorbed on silver and copper surfaces.…”

Electrochemical Behavior of 1,2,4-Triazole and Benzotriazole at Glassy Carbon Electrode in Acidic Media~!2010-01-15~!2010-06-14~!2010-07-06~!

“…In some of our recent reports we have used benzotriazole as the corrosion inhibitor in acidic media [10,11] and the mechanism of the inhibition have been reported. Electrosorption and polymerization of triazoles at the electrode-electrolyte interface using brass and gold electrode have been discussed in some of the recent studies [12][13][14]. Triazoles can present in different tautomeric forms, effect of such tautomeric forms on the electrochemical property of *Address correspondence to these authors at the Department of PG Studies and Research in Industrial Chemistry, Jnana Sahyadri, Shankaraghatta, Shimoga, Karnataka-577 301, India; Tel: +91-22-25590326; Fax: 91-22-25505151, E-mail: asatpati@barc.gov.in and Analytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai-400085, India; Tel: +91 08282 256222; Fax: +91 08282 256255; Email: bssherigara@rediffmail.com triazoles.…”

A Comparative Spectroelectrochemical Study of the Redox Electrochemistry of N-(Polyvinylamine)-Substituted-o-Nitroaniline

“…The other strong SERS band at 258 cm -1 is assigned to the gold-perchlorate stretching mode. Assignment of this mode has been discussed in detail in previous studies (29,45,53). Accordingly perchlorate anions are adsorbed at the gold surface and not displaced by the protonated polymer.…”

“…It must be examined whether just a large shift in position and intensity of a band which is basically close to two adjacent bands (ν Au-N and ν Au-OClO ) occurs. According to the reported SER-spectra of adsorbed − 4 ClO obtained with neutral electrolyte separately and at positive electrode potential (29,45,53) the mode ν Au-OClO appears at ≥ 250 cm -1 . Therefore, the band observed here at 259 cm -1 (Fig.…”