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Molecules 2010, 15(3), 1798-1810;

Synthesis of a Novel Fluorescent Sensor Bearing Dansyl Fluorophores for the Highly Selective Detection of Mercury (II) Ions

Department of Chemistry, Faculty of Science, Silpakorn University, Nakorn Pathom 73000, Thailand
Department of Chemistry and Center for Innovation in Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
Author to whom correspondence should be addressed.
Received: 1 February 2010 / Revised: 22 February 2010 / Accepted: 8 March 2010 / Published: 12 March 2010
(This article belongs to the Special Issue Macromolecules: Chemistry, Medicinal and Functional Materials)
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A new macromolecule possessing two dansyl moieties and based on 2-[4-(2-aminoethylthio)butylthio]ethanamine was prepared as a fluorescent sensor and its mercury sensing properties toward various transition metal, alkali, and alkali earth ions were investigated. The designed compound exhibited pronounced Hg2+-selective ON-OFF type fluorescence switching upon binding. The new compoundprovided highly selective sensing to Hg2+ in acetonitrile-water solvent mixtures with a detection limit of 2.49 x 10-7 M or 50 ppb. The molecular modeling results indicated that ions-recognition of the sensor originated from a self assembly process of the reagentand Hg2+ to form a helical wrapping structure with the favorable electrostatic interactions of Hg2+coordinated with sulfur, oxygen, nitrogen atoms and aromatic moieties. View Full-Text
Keywords: mercury sensor; fluoroionophore; Hg2+-selectivity; fluorescent sensor mercury sensor; fluoroionophore; Hg2+-selectivity; fluorescent sensor

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Wanichacheva, N.; Watpathomsub, S.; Lee, V.S.; Grudpan, K. Synthesis of a Novel Fluorescent Sensor Bearing Dansyl Fluorophores for the Highly Selective Detection of Mercury (II) Ions. Molecules 2010, 15, 1798-1810.

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