Royal Society of ChemistrySantos Figueroa, LE.; Moragues Pons, ME.; Climent Terol, E.; Agostini, A.; Martínez Mañez, R.; Sancenón Galarza, F. (2013). Chromogenic and fluorogenic chemosensors and reagents for anions.

In water and wine: Chromofluorogenic detection of the sulfite anion in pure water was accomplished by using a new hybrid organic-inorganic material that contained a probe entrapped in hydrophobic biomimetic cavities. This material was used for the detection of sulfite in red wine.

Four imidazoanthraquinone derivatives (2a-d) were synthesized and characterized and their coordination behavior against selected anions and cations tested. Acetonitrile solutions of probes showed charge-transfer absorptions in the 407-465 nm range. The four probes emitted in the 533-571 nm interval. The recognition ability of 2a-d was evaluated in the presence of F(-), Cl(-), Br(-), I(-), OCN(-), BzO(-), ClO4(-), AcO(-), HSO4(-), H2PO4(-), and CN(-). Only F(-), AcO(-), and H2PO4(-) induced a new red-shifted absorption band that was attributed to a deprotonation process involving the amine moiety of the imidazole ring. Moreover, upon increasing quantities of F(-), AcO(-), and H2PO4(-), moderate quenching was induced in the emission of 2a-d together with the appearance of a new red-shifted band. The UV-visible and emission behavior of the four probes in the presence of Cu(2+), Co(2+), Mg(2+), Fe(3+), Ba(2+), Fe(2+), Ni(2+), Ca(2+), Zn(2+), Pb(2+), Cd(2+), Cr(3+), Al(3+), K(+), and Li(+) was also assessed. Only addition of Fe(3+), Cr(3+), and Al(3+) caused a new blue-shifted band in 2a-d that was ascribed to a preferential coordination with the acceptor part of the probes. Moreover, an important quenching of the emission was observed which was ascribed to the interaction between these trivalent cations and 2a-d.

An anthracene-functionalised cyclam-copper(II) complex for the detection of HSin aqueous environments has been prepared. This probe displays poor fluorescence but can selectively and sensitively detect HSanions in water over other anions, biothiols and common oxidants such as H 2 O 2 through remarkably enhanced emission. This turn-on response in the presence of the HSanion is ascribed to a demetallation reac-[a] Centro de Reconocimiento Molecular y Desarrollo Tecnológico Supporting Information (see footnote on the first page of this article): General techniques, synthesis and characterisation of 1 and [Cu(1)] 2+ ; sensing features of [Cu(1)] 2+ ; cell viability assay of [Cu(1)] 2+ and fluorescence microscopy studies.

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A new fluorescent turn-on probe for the selective detection of hydrogen sulfide in water and living cells based on a 8-hydroxyquinoline fluorophore functionalized with a 2,6-dinitrophenyl ether moiety has been developed.

Four probes (i.e. D1-D4) for the selective and sensitive fluorogenic detection of HShave been prepared and characterized. HEPES (10 mM, pH 7.4)-DMSO 99:1 v/v solutions of D1-D4 are essentially non-fluorescent. Changes in the emission using D1-D4 in the presence of anions (F

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