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Highly chemically and thermally stable lanthanide coordination polymers for luminescent probes and white light emitting diodes

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Abstract

A series of isomorphic lanthanide coordination polymers with 2,6-dimethylpyridine-3,5-dicarboxylic acid (H2mpda), formulated as [Ln(Hmpda)3(H2mpda)] [Ln = Tb (1), Eu (2), Gd (3) and Ln = mixed lanthanide (4)], have been synthesized and structurally characterized. Single-crystal X-ray diffraction reveals that they are isomorphic and each displays a 1D chain-based structure, which can be expanded by hydrogen bond interactions into a 3D supramolecular architecture. In addition, they are thermally stable up to 350 °C and unusually chemically stable in a wide pH range of 2–13, which was confirmed by variable temperature XRD and pH dependent XRD. Meanwhile, the luminescence properties of compounds 1–4 are investigated. Of these, compound 1 acts as a luminescent probe for the sensing of temperature and pH, and compound 4 shows white light emission. Moreover, compounds 1, 2 and 4 were encapsulated in LED devices, with compound 4 exhibiting warm white light emission with excellent color rendering index (CRI) and correlated color temperature (CCT).

Graphical abstract: Highly chemically and thermally stable lanthanide coordination polymers for luminescent probes and white light emitting diodes

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Supplementary files

Article information


Submitted
14 Feb 2020
Accepted
06 Mar 2020
First published
06 Mar 2020

CrystEngComm, 2020, Advance Article
Article type
Paper

Highly chemically and thermally stable lanthanide coordination polymers for luminescent probes and white light emitting diodes

Q. Li, J. Qian, J. Zhou, L. Du and Q. Zhao, CrystEngComm, 2020, Advance Article , DOI: 10.1039/D0CE00228C

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