Title: Heterocyclic ring based colorimetric and fluorescent chemosensor for transition metal ions in an aqueous medium
Authors: Udhayakumari, Duraisamy
Velmathi, Sivan
Boobalan, Maria Susai
Venkatesan, Parthiban
Wu, Shu-Pao
Department of Applied Chemistry
Keywords: Colorimetric titration;UV-vis;Fluorescence spectroscopy;Micromolar;Bioimaging
Issue Date: 1-Feb-2015
Abstract: Heterocyclic ring based R1-R3 have been synthesized from the simple condensation method. R1-R3 exhibit highly selective and sensitive recognition towards transition metal ions in an aqueous medium via visual color change and were further confirmed by UV-vis and fluorescent spectroscopic methods. Fluorescent turn on and turn off behavior was observed for receptors tested with transition metal ions. The interaction of transition metal ions and receptors R1-R3 was confirmed to adopt 1:1 binding stoichiometry. Micromolar detection limit was found for R1-R3 with metal ions. DFT theoretical calculations were employed to understand the sensing mechanism of the sensors towards the metal ions. R1 and R2 were also successfully demonstrated as a fluorescent probe for detecting Cu2+ ions in living cells. (C) 2014 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jlumin.2014.10.040
ISSN: 0022-2313
DOI: 10.1016/j.jlumin.2014.10.040
Volume: 158
Begin Page: 484
End Page: 492
Appears in Collections:Articles