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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

,
,
*  and *
Departamento de Quimica Organica, Facultad de Quimica, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain
* Authors to whom correspondence should be addressed.
Received: 20 October 2010 / Revised: 15 November 2010 / Accepted: 26 November 2010 / Published: 10 December 2010
(This article belongs to the Section Chemical 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 (CC BY 3.0).
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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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