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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 33, Number 11
BKCSDE 33(11)
November 20, 2012 

 
Title
A Series of 3D Lanthanide Complexes Containing (La(III), Sm(III) and Gd(III)) Metal-organic Frameworks: Synthesis, Structure, Characterization and Their Luminescent Properties
Author
Huai-min Zhang, Hao Yang, Lan-zhi Wu, Shuang Song, Li-rong Yang*
Keywords
Synthesis, Structure, Isostructural, Metal-organic frameworks, Luminescent properties
Abstract
Three kinds of 3D isomorphous and isostructural coordination polymers, namely, {[Ln2(PDA)3(H2O)3]·0.25H2O}∞ (Ln = La(1), Sm(2), and Gd(3)) (PDA2− = pyridine-2,6-dicarboxylate anion) have been synthesized under hydrothermal conditions and characterized by elemental analyses, IR spectroscopy, thermal analyses and single crystal X-ray diffraction. In these MOFs, Ln(III) centers adopt eight-coordinated and nine-coordinated with the N1O7 and N2O7 donor sets to construct distorted trianglar dodecahedron geometry and tricapped trigonal prism configurations, respectively. Based on the building block of tetranuclear homometallic Ln4C4O8 unit (16- membered ring), 1-3 are connected into highly ordered 2D sheets via O-C-O linkers and further constructed into 3D architectures through hydrogen bonds. Crystallographic parameters suggest that the lanthanide contraction effect exist in these coordination polymers. Luminescent properties of the lanthanide-based MOFs (metal-organic frameworks) have been measured at room temperature, which reveal that they presenting ionselective characters toward certain metals, such as Mg2+, Cd2+ and Pb2+ ions.
Page
3777 - 3787
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