Synthesis and characterization of an unprecedented 3D lanthanide coordination polymer assembled by cubane-like clusters and a flexible V-shaped dicarboxylate ligand

• Published in: Inorganic chemistry communications Vol. 61; pp. 177 - 180
• Main Authors: An, Ran, Chen, Xiao-Li, Hu, Huai-Ming, Ren, Ya-Lan, Wu, Qing-Ran, Xue, Gang-Lin
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.11.2015
• Subjects: Coordination polymer; Cubane-like hydroxo cluster; Lanthanide; Luminescence; V-shaped dicarboxylate; Lanthanide; V-shaped dicarboxylate; Coordination polymer; Cubane-like hydroxo cluster; Luminescence
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2015.09.014

A lanthanide coordination polymer based on H2sfdb ligand, namely [Tb4(sdbc)4(phen)2(μ3-OH)4]n∙1.5nH2O (1) (H2sfdb=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 [Tb4(μ3-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 TbIII ions in 1, which is first found in the compounds based on H2sfdb ligand. The luminescence experiments show that TbIII compound exhibits the typical TbIII-centered luminescence. Four terbium(III) ions are bridged by four µ3-OH- groups to form a [Tb4(µ3-OH)4]8+ tetranuclear cluster, which is connected to the other eight terbium clusters though (sfdb)2- ligands to generate a novel 3D framework. [Display omitted] •The (sfdb)2− ligand adopts four different coordination modes.•Four TbIII ions are bridged by four μ3-OH− groups to form a [Tb4(μ3-OH)4]8+ tetranuclear cluster.•The 3D terbium coordination polymer is constructed by tetranuclear clusters.