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Int. J. Mol. Sci. 2012, 13(12), 16822-16832; doi:10.3390/ijms131216822

Turn-On Fluorescent Chemosensor for Hg2+ Based on Multivalent Rhodamine Ligands

1 Laboratory of Molecular Nanofabrication, MESA+ Institute for Nanotechnology, University of Twente, Enschede 7500 AE, The Netherlands 2 Department of Chemistry and Material Engineering, Logistic Engineering University, Chongqing 401311, China 3 Department of Chemistry, University of Sargodha, Punjab 40100, Pakistan
* Author to whom correspondence should be addressed.
Received: 22 November 2012 / Accepted: 4 December 2012 / Published: 7 December 2012
(This article belongs to the Special Issue Molecular Self-Assembly 2012)
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Rhodamine-based fluorescent chemosensors 1 and 2 exhibit selective fluorescence enhancement to Fe3+ and Hg2+ over other metal ions at 580 nm in CH3CN/H2O (3/1, v/v) solution. Bis(rhodamine) chemosensor 1, under optimized conditions (CH3CN/HEPES buffer (0.02 M, pH = 7.0) (95/5, v/v)), shows a high selectivity and sensitivity to Hg2+, with a linear working range of 0–50 μM, a wide pH span of 4–10, and a detection limit of 0.4 μM Hg2+.
Keywords: rhodamine; mercury; chemosensor; fluorescence rhodamine; mercury; chemosensor; fluorescence
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Wang, X.; Iqbal, M.; Huskens, J.; Verboom, W. Turn-On Fluorescent Chemosensor for Hg2+ Based on Multivalent Rhodamine Ligands. Int. J. Mol. Sci. 2012, 13, 16822-16832.

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