A Multi-responsive Regenerable Europium-Organic Framework Luminescent Sensor for Fe3+ , CrVI Anions, and Picric Acid

Wei Liu; Xin Huang; Cong Xu; Chunyang Chen; Lizi Yang; Wei Dou; Wanmin Chen; Huan Yang; Weisheng Liu

doi:10.1002/chem.201603607

A Multi-responsive Regenerable Europium-Organic Framework Luminescent Sensor for Fe³⁺ , Cr^VI Anions, and Picric Acid

Chemistry. 2016 Dec 23;22(52):18769-18776. doi: 10.1002/chem.201603607. Epub 2016 Nov 17.

Authors

Wei Liu¹, Xin Huang¹, Cong Xu¹, Chunyang Chen¹, Lizi Yang¹, Wei Dou¹, Wanmin Chen¹, Huan Yang¹, Weisheng Liu¹

Affiliation

¹ Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China.

PMID: 27709697
DOI: 10.1002/chem.201603607

Abstract

A novel luminescent microporous lanthanide metal-organic framework (Ln-MOF) based on a urea-containing ligand has been successfully assembled. Structural analysis revealed that the framework features two types of 1D channels, with urea N-H bonds projecting into the pores. Luminescence studies have revealed that the Ln-MOF exhibits high sensitivity, good selectivity, and a fast luminescence quenching response towards Fe³⁺ , Cr^VI anions, and picric acid. In particular, in the detection of Cr₂ O₇^2- and picric acid, the Ln-MOF can be simply and quickly regenerated, thus exhibiting excellent recyclability. To the best of our knowledge, this is the first example of a multi-responsive luminescent Ln-MOF sensor for Fe³⁺ , Cr^VI anions, and picric acid based on a urea derivative. This Ln-MOF may potentially be used as a multi-responsive regenerable luminescent sensor for the quantitative detection of toxic and harmful substances.

Keywords: lanthanides; luminescence-based sensor; metal-organic frameworks; nitro explosives; recyclability.