A Novel L-Shaped Fluorescent Probe for AIE Sensing of Zinc (II) Ion by a DR/NIR Response

Molecules

Rosita Diana¹  Barbara Panunzi¹  Luigi Di Costanzo¹  Francesco Silvio Gentile²  Ugo Caruso² 

[1] Department of Agriculture, University of Napoli Federico II, 80055 Portici, Italy;Department of Chemical Sciences, University of Napoli Federico II, 80126 Napoli, Italy;

关键词: fluorescence;    AIE;    DR/NIR;    zinc (II);    sensing;   

DOI  :  10.3390/molecules26237347

来源: DOAJ

【 摘 要 】

In the field of optical sensors, small molecules responsive to metal cations are of current interest. Probes displaying aggregation-induced emission (AIE) can solve the problems due to the aggregation-caused quenching (ACQ) molecules, scarcely emissive as aggregates in aqueous media and in tissues. The addition of a metal cation to an AIE ligand dissolved in solution can cause a “turn-on” of the fluorescence emission. Half-cruciform-shaped molecules can be a winning strategy to build specific AIE probes. Herein, we report the synthesis and characterization of a novel L-shaped fluorophore containing a benzofuran core condensed with 3-hydroxy-2-naphthaldehyde crossed with a nitrobenzene moiety. The novel AIE probe produces a fast colorimetric and fluorescence response toward zinc (II) in both in neutral and basic conditions. Acting as a tridentate ligand, it produces a complex with enhanced and red-shifted emission in the DR/NIR spectral range. The AIE nature of both compounds was examined on the basis of X-ray crystallography and DFT analysis.

【 授权许可】

Unknown