Water-stable lanthanide-based metal-organic frameworks for rapid and sensitive detection of nitrobenzene derivatives
Abstract
Two novel lanthanide metal-organic frameworks, namely {[Ln2(NSBPDC)3(H2O)4]·x(H2O)}n (Ln = Eu 1, Tb 2), have been facilely synthesized with 6-nitro-2,2'-sulfone-4,4'-dicarboxylic acid (H2NSBPDC). Structural analyses revealed that the two complexes are both three-dimensional (3D) non-interpenetrating networks based on infinite rod-shaped LnIII carboxylate SBUs and exhibit 1D channels decorated with functional groups. Fluorescence measurements show that complex 1 can serve as a fast and recyclable fluorescence sensor for nitroaromatics detection via a turn-off response with low detection limits. The fluorescence quenching of 1 for nitroaromatics is presumably due to the following two reasons: the photo-induced electronic transfer mechanism and the competitive adsorption mechanism.
- Publication:
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Journal of Solid State Chemistry France
- Pub Date:
- February 2019
- DOI:
- 10.1016/j.jssc.2018.11.041
- Bibcode:
- 2019JSSCh.270..463R
- Keywords:
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- Metal-organic framework;
- Lanthanide;
- Luminescence;
- Nitroaromatic explosives;
- Detection