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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
Author(s) -
Wang Li,
Gu Wen,
Liao ShengYun,
Zhang Ming,
Yang LinYan,
Wei XiaoHua,
Liu Xin
Publication year - 2012
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201200144
Subject(s) - lanthanide , luminescence , antiferromagnetism , crystallography , magnetic susceptibility , ligand (biochemistry) , bridging ligand , chemistry , infrared spectroscopy , metal organic framework , materials science , stereochemistry , crystal structure , ion , organic chemistry , physics , optoelectronics , condensed matter physics , adsorption , biochemistry , receptor
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 [ Ln 4 (L) 3 (H 2 O) 10 ] · 7H 2 O ( 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 (L I ) conformation displays a μ 4 ‐(κ 3 O, O, O 5 )(κ 2 O 2 ,O 2 )(κ 2 O 4 ,O 4 )‐bridging mode to generate 3D frameworks of complexes 1 – 8 and the α‐Po topology with the short Schläfli symbol {4 12 .6 3 } could be observed in complexes 1 – 8 . The near‐infrared luminescence properties were studied, and the results have shown that the Ho III , Er III , and Yb III 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.