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An OFF-ON chemosensor for biological and environmental applications: sensing Cd(2+) in water using catanionic vesicles and in living cells (Articolo in rivista)

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An OFF-ON chemosensor for biological and environmental applications: sensing Cd(2+) in water using catanionic vesicles and in living cells (Articolo in rivista) (literal)

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Bencini A, Caddeo F, Caltagirone C, Garau A, Hurstouse MB, Isaia F, Lampis S, Lippolis V, Lopez F, Meli V, Monduzzi M, Mostallino MC, Murgia S, Puccioni S, Schmidt J, Secci PP, Talmon Y (2013)
An OFF-ON chemosensor for biological and environmental applications: sensing Cd(2+) in water using catanionic vesicles and in living cells
in Organic & biomolecular chemistry
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Bencini A, Caddeo F, Caltagirone C, Garau A, Hurstouse MB, Isaia F, Lampis S, Lippolis V, Lopez F, Meli V, Monduzzi M, Mostallino MC, Murgia S, Puccioni S, Schmidt J, Secci PP, Talmon Y (literal)

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Istituto di Neuroscienze (CNR), Cagliari, Dipartimento di Chimica \"Ugo Schiff\", Università degli Studi di Firenze, Firenze; Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cagliari; School of Chemistry, University of Southampton, Southampton; Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah; Dipartimento di Agricoltura, Ambiente Alimenti (DIAAA) and Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase (CSGI), Università degli studi del Molise, Campobasso; Department of Chemical Engineering, Technion - Israel Institute of Technology, Haifa, Israel (literal)

Titolo

An OFF-ON chemosensor for biological and environmental applications: sensing Cd(2+) in water using catanionic vesicles and in living cells (literal)

Abstract

A new OFF-ON fluorescent chemosensor (L(1)) for Cd(2+) recognition based on a 5-chloro-8-hydroxyquinoline pendant arm derivative of 1,4,7-triazacyclononane ([9]aneN3) will be presented and its photochemical features in an MeCN-H2O 1 : 1 (v/v) mixture, in pure water, after inclusion within catanionic vesicles, and in living cells will be discussed. The coordination properties of L(1) both in solution and in the solid state were preliminarily studied and its selectivity towards Cd(2+)versus a set of different metal ions (Cu(2+), Zn(2+), Cd(2+), Pb(2+), Al(3+), Hg(2+), Co(2+), Ni(2+), Mn(2+), Mg(2+), K(+), Ca(2+), Ag(+), and Na(+)) was verified in MeCN-H2O 1 : 1 (v/v). In water, upon addition of increasing amounts of Cd(2+) to L(1) an enhancement of the fluorescence emission was detected. To overcome this serious drawback, L(1) was dissolved in an innovative catanionic vesicular solution based on sodium bis(2-ethylhexyl) sulfosuccinate, a traditional surfactant, and 1-dodecyl-3-methylimidazolium bromide, an ionic liquid. When enclosed within the vesicle bilayers in water, L(1) restored its fluorescence emission property upon addition of Cd(2+). Remarkably, L(1) enters the cellular membrane of living cells thus allowing the detection of intracellular Cd(2+). These findings encourage the application of this new fluorescent chemosensor in real samples for histological and environmental analyses. (literal)

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