In situ hydrothermal syntheses, structures and photoluminescent properties of four novel metal-organic frameworks constructed by lanthanide (Ln=Ce(III), Pr(III), Eu(III)) and Cu(I) metals with flexible dicarboxylate acids and piperazine-based ligands

Four novel metal-organic frameworks,[Cu2Cl2(pyrz)]n (1) and (H2pip)n[Ln2(pydc)4(H2O)2]n (Ln=Ce (2), Pr (3) and Eu (4), H2pzdc=2,3-pyrazinedicarboxylic acid, pyrz=pyrazine, H2pydc=2,6-pyridinedicarboxylic acid, H2pip=piperazine) have been synthesized under hydrothermal conditions and characterized by...

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Bibliographic Details
Published in:Journal of solid state chemistry 2016-01, Vol.233, p.415-421
Main Authors: Ay, Burak, Karaca, Serkan, Yildiz, Emel, Lopez, Valerie, Nanao, Max H., Zubieta, Jon
Format: Article
Language:English
Subjects:
COPPER
Copper(I) polymer
Cuprophilic interaction
DECARBOXYLATION
FOURIER TRANSFORMATION
HYDROTHERMAL SYNTHESIS
INFRARED SPECTRA
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
INTERACTIONS
LIGANDS
Luminescence
MONOCRYSTALS
Multiple decarboxylation
ORGANOMETALLIC COMPOUNDS
PHOSPHORESCENCE
PHOTOLUMINESCENCE
Piperazine
PIPERAZINES
POWDERS
RARE EARTH COMPLEXES
RARE EARTHS
SOLIDS
THERMAL GRAVIMETRIC ANALYSIS
ULTRAVIOLET RADIATION
X RADIATION
X-RAY DIFFRACTION
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Summary:Four novel metal-organic frameworks,[Cu2Cl2(pyrz)]n (1) and (H2pip)n[Ln2(pydc)4(H2O)2]n (Ln=Ce (2), Pr (3) and Eu (4), H2pzdc=2,3-pyrazinedicarboxylic acid, pyrz=pyrazine, H2pydc=2,6-pyridinedicarboxylic acid, H2pip=piperazine) have been synthesized under hydrothermal conditions and characterized by the elemental analysis, ICP, Far IR (FIR), FT-IR spectra, TGA, single crystal X-ray diffraction analysis and powder X-ray diffraction (PXRD). Compound 1 is two-dimensional containing Cl-Cu-Cl sites, while the lanthanide complexes contain one-dimensional infinite Ln–O-Ln chains. All the complexes show high thermal stability. The complexes 1–3 exhibit luminescence emission bands at 584, 598 and 614nm at room temperature when excited at 300nm. Complex 4 exhibits bright red solid-state phosphorescence upon exposure to UV radiation at room temperature. Four novel metal-organic frameworks have been synthesized under hydrothermal conditions. Thermal and luminescent properties of the compounds have been investigated. [Display omitted]
ISSN:0022-4596
1095-726X
DOI:10.1016/j.jssc.2015.10.033