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Multimodal use of new coumarin-based fluorescent chemosensors: towards highly selective optical sensors for Hg(2+) probing. (Articolo in rivista)

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Multimodal use of new coumarin-based fluorescent chemosensors: towards highly selective optical sensors for Hg(2+) probing. (Articolo in rivista) (literal)

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Bazzicalupi C, Caltagirone C, Cao Z, Chen Q, Di Natale C, Garau A, Lippolis V, Lvova L, Liu H, Lundström I, Mostallino MC, Nieddu M, Paolesse R, Prodi L, Sgarzi M, Zaccheroni N. (2013)
Multimodal use of new coumarin-based fluorescent chemosensors: towards highly selective optical sensors for Hg(2+) probing.
in Chemistry (Weinh., Print)
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Bazzicalupi C, Caltagirone C, Cao Z, Chen Q, Di Natale C, Garau A, Lippolis V, Lvova L, Liu H, Lundström I, Mostallino MC, Nieddu M, Paolesse R, Prodi L, Sgarzi M, Zaccheroni N. (literal)

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Istituto di Neuroscienze (CNR) Cagliari, Cagliari; Dipartimento di Chimica \"Ugo Shiff\" Università di Firenze, Firenze; Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cagliari; Dipartimento di Scienze e Tecnologie Chimiche Università di Roma \"Tor Vergata\" Roma; Department of Chemistry and Molecular Engineering East China University of Science and Technology, Shangai; Dipartimento di Ingegneria Elettronica Università di Roma \"Tor Vergata\", Roma; Faculty of Biology and Soil Science, St. Petersburg State University Universitetsakaya, St Petersburg; Department of Physics, Chemistry and Biology IFM, Linkçping University, Linkçping; Dipartimento di Chimica \"G. Ciamician\" Università degli Studi di Bologna, Bologna (literal)

Titolo

Multimodal use of new coumarin-based fluorescent chemosensors: towards highly selective optical sensors for Hg(2+) probing. (literal)

Abstract

Despite several types of fluorescent sensing molecules have been proposed and examined to signal Hg(2+) ion binding, the development of fluorescence-based devices for in-field Hg(2+) detection and screening in environmental and industrial samples is still a challenging task. Herein, we report the synthesis and characterization of three new coumarin-based fluorescent chemosensors featuring mixed thia/aza macrocyclic framework as receptors units, that is, ligands L1-L3. These probes revealed an OFF-ON selective response to the presence of Hg(2+) ions in MeCN/H2 O 4:1 (v/v), which allowed imaging of this metal ion in Cos-7 cells in vitro. Once included in silica core-polyethylene glycol (PEG) shell nanoparticles or supported on polyvinyl chloride (PVC)-based polymeric membranes, ligands L1-L3 can also selectively sense Hg(2+) ions in pure water. In particular we have developed an optical sensing array tacking advantage of the fluorescent properties of ligand L3 and based on the computer screen photo assisted technique (CSPT). In the device ligand L3 is dispersed into PVC membranes and it quantitatively responds to Hg(2+) ions in natural water samples. (literal)

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