Syntheses, structures, and photoluminescence of three-dimensional lanthanide coordination polymers with 2,5-pyridinedicarboxylic acid
- Department of Chemistry, Tongji University, Shanghai 200092 (China)
- Department of Chemistry, College of Science, Shanghai University, Shanghai 200444 (China)
Four new open-framework coordination polymers of lanthanide 2,5-pyridinedicarboxylates, with the formulas Pr2(pydc){sub 3}(H{sub 2}O){sub 2} (1), Ln(pydc)(Hpydc) (Ln=Tb (2), Er (3), Eu (5)), and Gd(pydc)(nic)(H{sub 2}O) (4) (H{sub 2}pydc=2,5-pyridinedicarboxylic acid, Hnic=nicotinic acid), have been hydrothermally synthesized and four of them (except Eu (5)) have been structurally characterized. Complex 1 consists of two types of ligand-binding modes contributing to link the PrO{sub 7}N(H{sub 2}O) polyhedral chains to three-dimensional (3D) open-framework architecture. Complexes 2 and 3 are isostructural and feature unique 3D cage-like supramolecular frameworks remarkably different from that of 1, owing to the different ligand-bridging pattern. Complex 4, however, has the distinct 3D open-framework architecture due to the presence of unexpected nicotinate ligands, which may be derived from pydc ligands via in-situ decarboxylation under the hydrothermal condition. - Graphical abstract: Four new lanthanide coordination polymers have been hydrothermally synthesized by the reaction of 2,5-pyridinedicarboxylic acid with the corresponding lanthanide nitrates, and they show three types of 3D open-framework architecture. Complexes 2 and 5 show strong characteristic green (or red) luminescence and long lifetimes.
- OSTI ID:
- 21128367
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 8 Vol. 181; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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