Effect of ring coordination of pyridine-3,5-dicarboxylate and metatungstate to Ln ions on metatungstate structure: Synthesis, structure and optical property of four new compounds
- Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024 (China)
Four novel compounds based on {alpha}-metatungstate [H{sub 2}W{sub 12}O{sub 40}]{sup 6-} (W{sub 12}) and Ln-organic complexes, (NH{sub 4}){sub 4}[Ln{sub 2}(L){sub 2}(H{sub 2}O){sub 9}(H{sub 2}W{sub 12}O{sub 40})].nH{sub 2}O (Ln=Eu{sup III} (1), Gd{sup III} (2), Dy{sup III} (4), n=11; Tb{sup III} (3), n=12; L=pyridine-3,5-dicarboxylate dianion) have been synthesized in aqueous solution and characterized by element analysis, IR spectrometry and thermogravimetric analysis. Single-crystal X-ray diffraction analyses reveal these compounds are isostructural with a P21/n space group. The W{sub 12} cluster acting as a tridentate ligand connects three Ln{sup 3+} ions, in turn, each Ln2 ion links two W{sub 12} clusters, as a result, a W{sub 12}-Ln polymeric chain is formed. Coordination of pyridine-3,5-dicarboxylate ligands to the Ln{sup 3+} ions leads to a Ln-L polymeric chain. The two chains, W{sub 12}-Ln and Ln-L, share Ln2 ions, resulting in a 2-D layer. Ring coordination of pyridine-3,5-dicarboxylate and W{sub 12} to the Ln ions changes some bond angles of W{sub 12} that leads to a slight distortion of W{sub 12} and splitting of vibration band of W-Oc-W. Solid-state photoluminescence properties of compounds 1-4 have been investigated. - Graphical abstract: Four two-dimensional {alpha}-metatungstate and Ln-pyridine-3,5-dicarboxylate compounds have been synthesized. During the research, we elucidated the effect of ring coordination of pyridine-3,5-dicarboxylate on the structures of the POM-based hybrids. Highlights: > Four new 2-D compounds based on [H{sub 2}W{sub 12}O{sub 40}]{sup 6-} and Ln-organic complexes have been synthesized. > We study the ring coordination of pyridine-3, 5-dicarboxylate and W{sub 12} to Ln ions. > The luminescent properties of these compounds have been investigated.
- OSTI ID:
- 21580098
- Journal Information:
- Journal of Solid State Chemistry, Vol. 184, Issue 6; Other Information: DOI: 10.1016/j.jssc.2011.03.047; PII: S0022-4596(11)00158-7; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AQUEOUS SOLUTIONS
BOND ANGLE
HYBRIDIZATION
IONS
LAYERS
LIGANDS
MONOCLINIC LATTICES
MONOCRYSTALS
OPTICAL PROPERTIES
PHOTOLUMINESCENCE
PYRIDINE
RARE EARTH COMPLEXES
RINGS
SOLIDS
SPACE GROUPS
SPECTROSCOPY
SYNTHESIS
THERMAL GRAVIMETRIC ANALYSIS
WATER
X-RAY DIFFRACTION
AZINES
CHARGED PARTICLES
CHEMICAL ANALYSIS
COHERENT SCATTERING
COMPLEXES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DIFFRACTION
DISPERSIONS
EMISSION
GRAVIMETRIC ANALYSIS
HETEROCYCLIC COMPOUNDS
HOMOGENEOUS MIXTURES
HYDROGEN COMPOUNDS
LUMINESCENCE
MIXTURES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PHOTON EMISSION
PHYSICAL PROPERTIES
PYRIDINES
QUANTITATIVE CHEMICAL ANALYSIS
SCATTERING
SOLUTIONS
SYMMETRY GROUPS
THERMAL ANALYSIS