Switching-on fluorescence by copper (II) and basic anions: A case study with a pyrene-functionalized squaramide

Aragoni M. C.;Lippolis V.;Caltagirone C.
Ultimo
2021

Abstract

The new symmetric acyclic N,N’-bis(1-pyrenyl) squaramide (H2L) functionalized with the pyrene moiety as a fluorogenic fragment has been designed and its ability to selectively detect specific anions and metals investigated. H2L selectively binds Cl− both in solution (DMSO 0.5% H2O and MeCN) and in the solid state, and allows to selectively detect Cu2+ in MeCN with the formation of a 2:1 metal-receptor complex, with a green intense emission appreciable by naked eye under the UV lamp. The H2L copper complex preserves its emission properties in the presence of Cl−. The addition of basic anions (OH−, CN−, and F−) up to 10 equivalents caused the deprotonation of the squaramide NHs and a dramatic change of the emission properties of the H2L copper complex.
2021
Inglese
26
5
1301
1301
Esperti anonimi
internazionale
scientifica
Anion recognition
DFT
Metal sensing
Squaramides
Supramolecular chemistry
Acetonitriles
Anions
Coordination Complexes
Copper
Density Functional Theory
Models, Molecular
Molecular Conformation
Pyrenes
Quinine
Spectrometry, Fluorescence
Picci, G.; Milia, J.; Aragoni, M. C.; Arca, M.; Coles, S. J.; Garau, A.; Lippolis, V.; Montis, R.; Orton, J. B.; Caltagirone, C.
1.1 Articolo in rivista
info:eu-repo/semantics/article
1 Contributo su Rivista::1.1 Articolo in rivista
262
10
none
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