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Sensors 2010, 10(12), 11311-11321; doi:10.3390/s101211311
Article

A Ferrocene-Quinoxaline Derivative as a Highly Selective Probe for Colorimetric and Redox Sensing of Toxic Mercury(II) Cations

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Received: 20 October 2010 / Revised: 15 November 2010 / Accepted: 26 November 2010 / Published: 10 December 2010
(This article belongs to the Section Physical Sensors)
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Abstract

A new chemosensor molecule 3 based on a ferrocene-quinoxaline dyad recognizes mercury (II) cations in acetonitrile solution. Upon recognition, an anodic shift of the ferrocene/ferrocenium oxidation peaks and a progressive red-shift (Δλ = 140 nm) of the low-energy band, are observed in its absorption spectrum. This change in the absorption spectrum is accompanied by a colour change from orange to deep green, which can be used for a “naked-eye” detection of this metal cation.
Keywords: ferrocene; quinoxaline; mercury; electrochemistry; UV-vis spectroscopy ferrocene; quinoxaline; mercury; electrochemistry; UV-vis spectroscopy
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Zapata, F.; Caballero, A.; Molina, P.; Tarraga, A. A Ferrocene-Quinoxaline Derivative as a Highly Selective Probe for Colorimetric and Redox Sensing of Toxic Mercury(II) Cations. Sensors 2010, 10, 11311-11321.

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