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Voltammetric metal cation sensors based on ferrocene derivatives with oxazoline and imine substituents

Sutcliffe, O.B.; Chesney, A.; Bryce, M.R.

Authors

O.B. Sutcliffe

A. Chesney



Abstract

Ferrocene derivatives la, lb and 2 containing oxazoline substituents act as efficient voltammetric sensors of Mg2+ and Ca2+ ions in acetonitrile solution in concentrations as low as 10 mol%: a new redox peak appears in the cyclic voltammogram, positively shifted by 310-360 mV for 1a and 1b, and by 160-190 mV for 2, compared to E-1/2 of the free ligand. For the bisferrocenyldiimine derivative 3 the shift is 150-160 mV. Compounds la, lb and 3 are also responsive to Cu2+ ions (shifts of 250, 320 and 160 mV, respectively) and compound 3 is responsive to Zn2+ ions (150 mV shift) with no interference from a large excess of several other metal salts. UV-vis spectrophotometric studies and H-1-NMR titration experiments confirm that the oxazoline or imine groups are the sites of metal complexation. (C) 2001 Elsevier Science B.V. All rights reserved.

Citation

Sutcliffe, O., Chesney, A., & Bryce, M. (2001). Voltammetric metal cation sensors based on ferrocene derivatives with oxazoline and imine substituents. Journal of Organometallic Chemistry, 637, 134-138

Journal Article Type Article
Publication Date 2001-12
Journal Journal of Organometallic Chemistry
Print ISSN 0022-328X
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 637
Pages 134-138
Publisher URL <Go to ISI>://000172577800019