Syntheses, structures, fluorescence and magnetism of six lanthanide metal-organic frameworks based on silicon-centered tetrahedral ligand
Yang-xue Li , Ming Xue , Li-jia Guo , Lin Huang , Si-ru Chen , Shi-lun Qiu
Chemical Research in Chinese Universities ›› 2013, Vol. 29 ›› Issue (2) : 196 -200.
Syntheses, structures, fluorescence and magnetism of six lanthanide metal-organic frameworks based on silicon-centered tetrahedral ligand
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 carboxylate 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.
Metal-organic framework / Tetrakis(4-carboxyphenyl)silane / Magnetic property / Fluorescence
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