Synthesis and Electrochemical Characterizations of 7-Ferrocenycarbonyloxy-1-heptanethiol on Gold Substrates

The 7-ferrocenycarbonyloxy-1-heptanethiol (FcCO 2 C 7 SH) is synthesized using ferrocene carboxylic acid, 1,6-fibromohexane, and NaS, which is confirmed and separated by FT-IR, 1 H NMR, and column chromatography. The basic redox (interfacial) properties are also studied of the self-assembled monolayers (SAMs) formed with this synthesized compound on polycrystalline gold electrode by Electrochemical Quartz Crystal Microbalance (EQCM). The FcCO 2 C 7 SH on gold acts as a barrier for the electron transfer between the gold electrode and HClO 4 in solutions and as a mediator for the reduction of Fe 3+ in solution. The frequency change (interfacial mass change) on the gold electrode surface is observed during the redox of ferrocenyl groups. Keywords: 7-Ferrocenycarbonyloxy-1-heptanethiol; Self-Assembled Monolayers; EQCM; Peak current; Modified gold electrode. © 2009 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. DOI: 10.3329/jsr.v1i2.1746