TY - JOUR ID - 2783 TI - CHARACTERIZATION OF MERCAPTOBENZIMIDAZOLE ADSORPTION ON AN Au(111) ELECTRODE JO - Iranian Journal of Science JA - ISTT LA - en SN - 2731-8095 AU - HOSSEINI, M. G. AU - SHAHRABI, T. AU - NICHOLS, R. J. AD - Electrochemistry Laboratory Research, Department of Physical Chemistry, Faculty of Chemistry, Tabriz University, I. R. of Iran, AD - Department of Materials Science, Faculty of Engineering, Tarbiat Modarres University, Tehran, I. R. of Iran AD - Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD, England Y1 - 2005 PY - 2005 VL - 29 IS - 1 SP - 49 EP - 63 KW - In-sutu iInfrared spectroscopic KW - scanning tunneling microscopy KW - Au(111) KW - 2-mercaptobenzimidazole KW - 2-MBI KW - cyclic voltanmmetry DO - 10.22099/ijsts.2005.2783 N2 - The adsorption of 2-mercaptobenzimidazole (2-MBI) on Au(111) has been studied withcyclic voltammetry (CV), in-situ subtractively normalised interfacial FT-IR spectroscopy (SNIFTIRS)and scanning tunnelling microscopy (STM). Although adsorbed 2-MBI reduces the interfacial capacityand 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 onlypartially impeded. Cyclic voltammetry has also been used to examine the reductive desorption of thethiolate 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 configurationof the monolayer, in agreement with a previous XPS study. The SNIFTIRS and electrochemical resultsshow that adsorbed 2-MBI is displaced from the surface at positive potentials. STM imaging of adsorbed2-MBI is also consistent with flat-lying molecules aligned in parallel rows. UR - https://ijsts.shirazu.ac.ir/article_2783.html L1 - https://ijsts.shirazu.ac.ir/article_2783_1d13963fea733175a4516898168bd7b6.pdf ER -