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Title: Rhodamine B-based turn-on fluorescent and colorimetric chemosensors for highly sensitive and selective detection of mercury (II) ions
Authors: Nantanit Wanichacheva
Krit Setthakarn
Narupon Prapawattanapol
Oranual Hanmeng
Vannajan Sanghiran Lee
Kate Grudpan
Keywords: Biochemistry, Genetics and Molecular Biology
Physics and Astronomy
Issue Date: 1-Jan-2012
Abstract: Two novel macromolecules based on 2-[3-(2-aminoethylsulfanyl) propylsulfanyl]ethanamine covalently bound to one and two units of rhodamine-B moieties, 1 and 2, were prepared and utilized as fluoroionophores and chromophores for the optical detection of Hg2ions. The sensors were readily prepared by a conventional two-step synthesis. Especially, sensor 1 exhibits high sensitivity and selective OFFON fluorescence enhancement and chromogenic change upon binding to Hg2, which served as a naked-eye indicator by a noticeable color change of the solution (from colorless to pinkred color). 1 is shown to discriminate various competing metal ions, particularly Ag and Cu2, as well as Cd2, Na, Li, K, Ba2, Co2, Ni2, Mg2, Mn2and Al3, with a detection limit of 10 ppb. © 2011 Elsevier B.V. All rights reserved.
ISSN: 00222313
Appears in Collections:CMUL: Journal Articles

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