Switching-On Fluorescence by Copper (II) and Basic Anions: A Case Study with a Pyrene-Functionalized Squaramide

Overview

Journal Molecules

Publisher MDPI

Specialty Biology

Date 2021 Mar 6

PMID 33670937

Citations 2

Authors

Giacomo Picci

Jessica Milia

Maria Carla Aragoni

Massimiliano Arca

Simon J Coles

Alessandra Garau

Vito Lippolis

Riccardo Montis

James B Orton

Claudia Caltagirone

Affiliations

Soon will be listed here.

Abstract

The new symmetric acyclic -bis(1-pyrenyl) squaramide () functionalized with the pyrene moiety as a fluorogenic fragment has been designed and its ability to selectively detect specific anions and metals investigated. selectively binds Cl both in solution (DMSO 0.5% HO and MeCN) and in the solid state, and allows to selectively detect Cu 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 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 copper complex.

Citing Articles

Anion-Responsive Fluorescent Supramolecular Gels.

Picci G, Mulvee M, Caltagirone C, Lippolis V, Frontera A, Gomila R Molecules. 2022; 27(4).

PMID: 35209044 PMC: 8876235. DOI: 10.3390/molecules27041257.

Fluorescence Recognition of Anions Using a Heteroditopic Receptor: Homogenous and Two-Phase Sensing.

Zaleskaya-Hernik M, Dobrzycki L, Karbarz M, Romanski J Int J Mol Sci. 2021; 22(24).

PMID: 34948192 PMC: 8703701. DOI: 10.3390/ijms222413396.

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