Search

A lanthanide coordination polymer based on H 2 sfdb ligand, namely [Tb 4 (sdbc) 4 (phen) 2 (μ 3 -OH) 4 ] n ∙ 1.5 n H 2 O ( 1 ) (H 2 sfdb = 4,4′-sulfonyldibenzoic acid, phen = 1,10-phenanthroline) has been hydrothermal synthesized and characterized. Compound 1 exhibits an unprecedented three-dimensional framework that comprised new cubane-like hydroxo clusters [Tb 4 (μ 3 -OH) 4 ] 8 + as the nodes and flexible (sfdb) 2 − ligands as the linkers. In 1 , (sfdb) 2 − ligands display completely different four kinds of coordination modes. Interestingly, not only the carboxylate groups but also one oxygen atom of sulfonyl group of (sfdb) 2 − ligand are coordinated with Tb III ions in 1 , which is first found in the compounds based on H 2 sfdb ligand. The luminescence experiments show that Tb III compound exhibits the typical Tb III -centered luminescence. [ABSTRACT FROM AUTHOR]

Two coordination polymers, [M(cbdc)(bipy)(HO)] [M = Zn ( 1), Cd ( 2)]. (Hcbdc = 1,1-cyclobutane dicarboxylic acid, bipy = 4,4′-bipyridine), have been synthesized by using Zn(II)/Cd(II) acetate with cbdc and bipy ligands under hydrothermal conditions. Their structures have been characterized by elemental analysis, IR spectroscopy, single-crystal X-ray crystallography and powder X-ray diffraction analysis. Complexes 1 and 2 are isostructural and show a 3D pillared-layer network with (3,4)-connected InS topology. The luminescent properties of the complexes and the free ligand have been investigated. Graphical Abstract: Two novel coordination polymers based on the flexible alicyclic dicarboxylic acid ligand 1,1-cyclobutane dicarboxylic acid (Hcbdc) ligand have been synthesized under hydrothermal conditions. Complexes 1 and 2 are isostructural and show a 3D pillared-layer network with (3,4)-connected InS topology. The luminescent properties of the complexes and the free ligand have been investigated.[Figure not available: see fulltext.] [ABSTRACT FROM AUTHOR]

One new heterometallic complex [Cd 2 Cu(BTC) 2 (H 2 O) 2 ]⋅2H 2 O ( 1 ) (BTC = benzene-1,3,5-tricarboxylate), has been synthesized and characterized by elemental analysis and single-crystal X-ray diffraction techniques. The structure indicates that the complex 1 crystallizes in triclinic, space group P ī, in which, the carboxylate groups of BTC ligand adopt μ 2 –η 1 :η 1 , and μ 2 –η 2 :η 1 coordination modes, bridging Cd(II) and Cu(II) atoms to generate 2D Cd-BTC bilayer then to a (4,6)-connected open 3D framework with 1D channels occupied by guest water molecules. In addition, thermal gravimetric analysis (TGA) and luminescent property of 1 were investigated. [ABSTRACT FROM AUTHOR]