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- Title
Syntheses, Structures, Magnetic Properties, and NIR Emission Properties of a Series of Novel 1, 2, 4, 5-Cyclohexanetetracarboxylate-bridged Lanthanide Complexes with 3D Framework Structures.
- Authors
Wang, Li; Gu, Wen; Liao, Sheng-Yun; Zhang, Ming; Yang, Lin-Yan; Wei, Xiao-Hua; Liu, Xin
- Abstract
Solvothermal combination of trivalent lanthanide metal precursors with 1, 2, 4, 5-cyclohexanetetracarboxylic acid (L) ligand has afforded the preparation of a family of eight new coordination polymers [ Ln4(L)3(H2O)10] ·7H2O ( Ln = Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb) ( 1- 8). Structural analyses reveal that the 1, 2, 4, 5-cyclohexanetetracarboxylic acid ligand with e, a, a, e (LI) conformation displays a μ4-(κ3O, O, O5)(κ2O2,O2)(κ2O4,O4)-bridging mode to generate 3D frameworks of complexes 1- 8 and the α-Po topology with the short Schläfli symbol {412.63} could be observed in complexes 1- 8. The near-infrared luminescence properties were studied, and the results have shown that the HoIII, ErIII, and YbIII complexes emit typical near-infrared luminescence in the solid-state. Variable-temperature magnetic susceptibility measurements of complexes 2- 7 have shown that complex 2 (Gd) shows the ferromagnetic coupling between magnetic centers, whereas the complexes 3- 7 show the antiferromagnetic coupling between magnetic centers. Additionally, the thermogravimetric analyses were discussed.
- Publication
Zeitschrift für Anorganische und Allgemeine Chemie, 2012, Vol 638, Issue 14, p2353
- ISSN
0044-2313
- Publication type
Article
- DOI
10.1002/zaac.201200144