Synthesis of novel chiral bis(ferrocenyl) ligands and their use as voltammetric metal cation sensors

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Sutcliffe, O.B. and Bryce, M.R. and Batsanov, A.S. (2002) Synthesis of novel chiral bis(ferrocenyl) ligands and their use as voltammetric metal cation sensors. Journal of Organometallic Chemistry, 656 (1-2). pp. 211-216. ISSN 0022-328X (http://dx.doi.org/10.1016/S0022-328X(02)01593-0)

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Abstract

Bis(ferrocenyl) derivatives 3a, 3c and 3d containing secondary chelating substituents act as efficient voltammetric sensors of Mg2+ and Zn2+ ions in acetonitrile solution in concentrations as low as 10 mol%: a new redox peak appears in the cyclic voltammogram, positively shifted by 170-225 mV for 3a, 160-175 mV for 3c and 160-170 mV for 3d. Compounds 3b and 4 are selective for Zn2+ (215 mV shift) and Mg2+ (205 mV shift) ions, respectively, whilst 3d is also responsive to Ca2+ ions (165 mV shift) with no interference from a large excess of several other metal salts. The X-ray crystal structure of 3a is also reported.

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