Structure and dynamics of micelle-based fluorescent sensor for transition metals.

Mangano, Carlo; Pallavicini, Piersandro; Díaz-Fernández, Y.; Pérez-Gramatges, A.; Rodríguez-Calvo, S. .

doi:10.1016/j.cplett.2004.09.063

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A structural model of the fluorescent supramolecular sensor Triton X-100:pyrene:dodecyl-dioxo-2,3,2 is proposed, based on a micellar approach. Under the experimental conditions, phase behavior of the micellar solution restricts ligand:surfactant ratio to 1:10. Thermodynamic and kinetic data indicate that the quenching mechanism involved in the ON-OFF response is intramicellar, and selective compartmentalization of fluorophore and quencher inside micelles can affect effective collisions. An oblate ellipsoid is proposed as the most suitable structure for this micellar-based sensor. Main structural properties of surfactant aggregates and the complex itself are not affected by this assembling, suggesting that the micelle acts as a dynamic substrate

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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11571/21259

Titolo:	Structure and dynamics of micelle-based fluorescent sensor for transition metals.
Autori interni:	MANGANO, CARLO PAOLO PALLAVICINI, PIERSANDRO DIAZ FERNANDEZ, YURI ANTONIO
Data di pubblicazione:	2004
Rivista:	CHEMICAL PHYSICS LETTERS
Abstract:	A structural model of the fluorescent supramolecular sensor Triton X-100:pyrene:dodecyl-dioxo-2,3,2 is proposed, based on a micellar approach. Under the experimental conditions, phase behavior of the micellar solution restricts ligand:surfactant ratio to 1:10. Thermodynamic and kinetic data indicate that the quenching mechanism involved in the ON-OFF response is intramicellar, and selective compartmentalization of fluorophore and quencher inside micelles can affect effective collisions. An oblate ellipsoid is proposed as the most suitable structure for this micellar-based sensor. Main structural properties of surfactant aggregates and the complex itself are not affected by this assembling, suggesting that the micelle acts as a dynamic substrate
Handle:	http://hdl.handle.net/11571/21259
Appare nelle tipologie:	1.1 Articolo in rivista

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