Chemical Research in Chinese Universities ›› 2013, Vol. 29 ›› Issue (2): 196-200.doi: 10.1007/s40242-013-2291-8

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Syntheses, Structures, Fluorescence and Magnetism of Six Lanthanide Metal-organic Frameworks Based on Silicon-centered Tetrahedral Ligand

LI Yang-xue, XUE Ming, GUO Li-jia, HUANG Lin, CHEN Si-ru, QIU Shi-lun   

  1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, P. R. China
  • Received:2012-07-31 Revised:2012-09-05 Online:2013-04-01 Published:2013-03-20
  • Supported by:

    Supported by the National Basic Research Program of China(Nos.2011CB808703, 2012CB821700) and the National Natural Science Foundation of China(Nos.91022030, 21101072).

Abstract:

Multifunctional lanthanide metal-organic frameworks(MOFs), M(H4TCPS)(H2O)1.5[M=Tb(JUC-95a), Er(JUC-95b), Dy(JUC-95c), Tm(JUC-95d), Y(JUC-95e) and Pr(JUC-95f); H4TCPS=tetrakis(4-carboxyphenyl)silane] were synthesized via the reaction of the lanthanide metal ions(Ln3?) with a rigid silicon-centered tetrahedral carbo- xylate ligand H4TCPS via a hydrothermal synthesis method. X-Ray diffraction(XRD) analyses reveal that they are extremely similar in structure and crystallized in a monoclinic system with space group C2/c. Two eight-coordinated metal centers and four tetrahedral H4TCPS groups constructed a paddle-wheel building block. The paddle-wheel buil- ding blocks assembled with each other via one oxygen bridge from a water molecule to lead to a 1D infinite inorganic rod-shaped chain, -Y-O-C-O-Y-, along the [001] direction. These 1D inorganic rod-shaped chains linked with the phenyl groups of the tetrahedral H4TCPS ligand to form a 3D framework. In addition, the luminescent and magnetic properties of these compounds show that they could be potential antiferromagnetic and fluorescent materials.

Key words: Metal-organic framework, Tetrakis(4-carboxyphenyl)silane, Magnetic property, Fluorescence