Issue 19, 2021

Chromone@cucurbit[7]uril triggers the luminescence of lanthanides in water

Abstract

Chromone (CMO) and cucurbit[7]uril (Q[7]) interact with each other in aqueous solution to form a 1 : 1 inclusion complex CMO@Q[7] (L). The inclusion complex coordinates with Eu3+, Tb3+, Dy3+, and Sm3+ ions to form four complexes: L@Eu3+, L@Tb3+, L@Dy3+, and L@Sm3+. The complexation of these four lanthanide ions induces fluorescence emission corresponding to their respective characteristic spectral lines. Detailed luminescence studies have shown that the ternary rare-earth complexes exhibit strong fluorescence intensities and long lifetimes. The formation of these complexes with L not only triggers luminescence of lanthanides, but also produces specific fluorescence responses to antibiotics in aqueous solution, successfully demonstrating a new type of application for this supramolecular system.

Graphical abstract: Chromone@cucurbit[7]uril triggers the luminescence of lanthanides in water

Supplementary files

Article information

Article type
Communication
Submitted
10 Feb 2021
Accepted
02 May 2021
First published
06 May 2021

J. Mater. Chem. C, 2021,9, 6160-6165

Chromone@cucurbit[7]uril triggers the luminescence of lanthanides in water

Z. Zeng, X. Zhang, G. Luo, Y. Meng, L. Zhang, W. Zhao, Z. Tao and Q. Zhang, J. Mater. Chem. C, 2021, 9, 6160 DOI: 10.1039/D1TC00664A

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