Publication Date:
2018-02-28
Description:
Two new two-dimensional lanthanide coordination polymers, namely poly[[tetra-μ 2 -acetato-tetraaquabis(μ 4 -biphenyl-3,3′,5,5′-tetracarboxylato)tetrakis(dimethylacetamide)tetraterbium(III)] pentahydrate], {[Tb 4 (C 16 H 6 O 8 ) 2 (C 2 H 3 O 2 ) 4 (C 4 H 9 NO) 4 (H 2 O) 4 ]·5H 2 O} n , (1), and poly[[tetra-μ 2 -acetato-tetraaquabis(μ 5 -biphenyl-3,3′,5,5′-tetracarboxylato)tetrakis(dimethylacetamide)tetraeuropium(III)] tetrahydrate], {[Eu 4 (C 16 H 6 O 8 ) 2 (C 2 H 3 O 2 ) 4 (C 4 H 9 NO) 4 (H 2 O) 4 ]·4H 2 O} n , (2), have been synthesized from biphenyl-3,3′,5,5′-tetracarboxylic acid (H 4 bpt) and Ln(NO 3 ) 3 ·6H 2 O (Ln = Tb and Eu) under solvothermal conditions. Single-crystal X-ray structure analysis shows that the two compounds are isostructural and crystallize in the monoclinic P 2 1 / n space group. The crystal structures are constructed from bpt 4− ligands (as linkers) and {Ln 2 (μ 2 -CH 3 COO) 2 } building units (as nodes), which topological analysis shows to be a (4,6)-connected network with sql topology. Compounds (1) and (2) have been characterized by elemental analysis, IR spectroscopy, powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA) and fluorescence analysis in the solid state. In addition, a magnetic investigation shows the presence of antiferromagnetic interactions in compound (1). Two new two-dimensional lanthanide coordination polymers have been synthesized under solvothermal conditions from biphenyl-3,3′,5,5′-tetracarboxylic acid (H 4 bpt) and Ln(NO 3 ) 3 ·6H 2 O (Ln = Tb and Eu). Topological analysis shows that the bpt 4− ligand and the {Ln 2 (μ 2 -CH 3 COO) 2 } building unit could be considered as a (4,6)-connected network with sql topology. A magnetic investigation shows the presence of antiferromagnetic interactions in the Tb compound.
Print ISSN:
0108-2701
Electronic ISSN:
1600-5759
Topics:
Chemistry and Pharmacology
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Geosciences
,
Physics
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