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HOSSEINI, M. G., SHAHRABI, T., NICHOLS, R. J.. (1383). CHARACTERIZATION OF MERCAPTOBENZIMIDAZOLE ADSORPTION ON AN Au(111) ELECTRODE. , 29(1), 49-63. doi: 10.22099/ijsts.2005.2783
M. G. HOSSEINI; T. SHAHRABI; R. J. NICHOLS. "CHARACTERIZATION OF MERCAPTOBENZIMIDAZOLE ADSORPTION ON AN Au(111) ELECTRODE". , 29, 1, 1383, 49-63. doi: 10.22099/ijsts.2005.2783
HOSSEINI, M. G., SHAHRABI, T., NICHOLS, R. J.. (1383). 'CHARACTERIZATION OF MERCAPTOBENZIMIDAZOLE ADSORPTION ON AN Au(111) ELECTRODE', , 29(1), pp. 49-63. doi: 10.22099/ijsts.2005.2783
HOSSEINI, M. G., SHAHRABI, T., NICHOLS, R. J.. CHARACTERIZATION OF MERCAPTOBENZIMIDAZOLE ADSORPTION ON AN Au(111) ELECTRODE. , 1383; 29(1): 49-63. doi: 10.22099/ijsts.2005.2783

CHARACTERIZATION OF MERCAPTOBENZIMIDAZOLE ADSORPTION ON AN Au(111) ELECTRODE

Iranian Journal of Science
مقاله 6، دوره 29، شماره 1، اردیبهشت 2005، صفحه 49-63    اصل مقاله (727.47 K)
نوع مقاله: Regular Paper
شناسه دیجیتال (DOI): 10.22099/ijsts.2005.2783
نویسندگان
M. G. HOSSEINI* 1؛ T. SHAHRABI2؛ R. J. NICHOLS3
1Electrochemistry Laboratory Research, Department of Physical Chemistry, Faculty of Chemistry, Tabriz University, I. R. of Iran,
2Department of Materials Science, Faculty of Engineering, Tarbiat Modarres University, Tehran, I. R. of Iran
3Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD, England
چکیده
The adsorption of 2-mercaptobenzimidazole (2-MBI) on Au(111) has been studied with
cyclic voltammetry (CV), in-situ subtractively normalised interfacial FT-IR spectroscopy (SNIFTIRS)
and scanning tunnelling microscopy (STM). Although adsorbed 2-MBI reduces the interfacial capacity
and quenches the characteristic features of the cyclic voltammogram for sulfate adsorption,
heterogeneous electron transfer to both the [Fe(CN)6]4-/3- and [Ru(NH3)6]3+/2+ redox systems is only
partially impeded. Cyclic voltammetry has also been used to examine the reductive desorption of the
thiolate in KOH electrolytes and its subsequent re-adsorption. From the reductive desorption charge,
coverage of 2-MBI of 2.6 x 10-10 molecule cm-2 is estimated and this points to a flat-lying configuration
of the monolayer, in agreement with a previous XPS study. The SNIFTIRS and electrochemical results
show that adsorbed 2-MBI is displaced from the surface at positive potentials. STM imaging of adsorbed
2-MBI is also consistent with flat-lying molecules aligned in parallel rows.
کلیدواژه‌ها
In-sutu iInfrared spectroscopic؛ scanning tunneling microscopy؛ Au(111)؛ 2-mercaptobenzimidazole؛ 2-MBI؛ cyclic voltanmmetry
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