A new turn-on Cu2+ fluorescent sensor (CST) having a trehalose moiety, which confers a relatively large solubility in water, has been synthesized. The chemosensor is therefore suitable for studies in aqueous solution. Full potentiometric and UV-vis characterization evidence that at physiological pH CST forms with Cu2+ a species with a 1 : 1 stoichiometry allowing for a straightforward correlation between CST response and copper(II) concentration. The presence of the trehalose unit does not negatively affect the selectivity of CST for Cu2+ over a series of metal ions of interest as proven by fluorescencemeasurements. The novel chemosensor, tested in differentiated neuroblastoma SH-SY5Y cells, is able todetect Cu2+ in the extracellular region, as well as to track copper transfer processes upon cell stimulation induced by cellular depolarization.

Ratiometric fluorescence sensing and cellular imaging of Cu2+ by a new water soluble trehalose-naphthalimide based chemosensor

GRASSO, GIUSEPPA;SATRIANO, Cristina;SGARLATA, CARMELO;TOMASELLI, Gaetano;ARENA, Giuseppe;
2013-01-01

Abstract

A new turn-on Cu2+ fluorescent sensor (CST) having a trehalose moiety, which confers a relatively large solubility in water, has been synthesized. The chemosensor is therefore suitable for studies in aqueous solution. Full potentiometric and UV-vis characterization evidence that at physiological pH CST forms with Cu2+ a species with a 1 : 1 stoichiometry allowing for a straightforward correlation between CST response and copper(II) concentration. The presence of the trehalose unit does not negatively affect the selectivity of CST for Cu2+ over a series of metal ions of interest as proven by fluorescencemeasurements. The novel chemosensor, tested in differentiated neuroblastoma SH-SY5Y cells, is able todetect Cu2+ in the extracellular region, as well as to track copper transfer processes upon cell stimulation induced by cellular depolarization.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/16200
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