M. Nicolas, B. Fabre, J. Simonet
Jan 31, 2001
Citations
1
Influential Citations
39
Citations
Journal
Electrochimica Acta
Abstract
Abstract The electrochemical behaviour of a boronic acid-substituted 2,2′-bipyridine 1 Fe(II) complex ([Fe(II) 1 3 ] 2+ ) has been investigated in aqueous buffered solutions, in the absence and in the presence of F − or various sugars as guest species. The binding of the halide to the boron atom led to a shift of the Fe(II)/Fe(III) oxidation peak towards less positive potentials whereas the sugars, and particularly d -fructose, had an opposite effect. With the aim of developing electrochemical sensors, the immobilization of this redox-active receptor onto an electrode surface has been successfully achieved from an electropolymerizable organometallic assembly consisting of the ligand 1 and a N -substituted pyrrole derivative. Its anodic oxidation yielded polymer films which exhibited stable electroactive properties in CH 3 CN. Owing to the total loss of their electroactivity in aqueous media, only the effect of F − on the response of the immobilized Fe(II)/Fe(III) system has been examined in CH 3 CN. An unusual complexation-induced catalytic phenomenon was evidenced in the presence of this guest anion.