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A new three-dimensional supramolecular [Ce2(2,5-pydc)3(H2O)2](1) has been hydrothermally synthesized at 180 ℃ and characterized by single-crystal X-ray diffraction.X-ray crystal analyses reveal that the compound belongs to the monoclinic system,space group P21/c,C21H13Ce2N3O14,a = 6.561(1),b = 17.986(5),c = 9.411(3) ,β = 95.558(5)° and Z = 2.In the structure of 1,each Ce(1) center is surrounded by 2,5-pydc ligands,forming the 6-connected node,and the 2,5-pydc ligand coordinates to the Ce(Ⅲ) in two different coordination modes.In mode 1,the four oxygen atoms of two carboxyl groups connect neighboring Ce(Ⅲ) ions,giving 4-connected(4-c) second building unit(SBU-1).Furthermore,the structure is extended into a 2-D layer from SBU-1 by sharing Ce(1) atoms.In mode 2,the ligand coordinates to the Ce(Ⅲ) ion from the adjacent chain with the 4-connected(4-c) second building unit(SBU-2),generating a 1-D ladder from SBU-2 by sharing Ce(1) atoms.Finally,the structure is extended into a 6,4,4-c network.Its photoluminescence property was also investigated.
A new three-dimensional supramolecular [Ce2 (2,5-pydc) 3 (H2O) 2] (1) has been hydrothermally synthesized at 180 ° C and characterized by single-crystal X-ray diffraction compound belongs to the monoclinic system, space group P21 / c, C21H13Ce2N3O14, a = 6.561 (1), b = 17.986 (5), c = 9.411 (3) the structure of 1, each Ce (1) center is surrounded by 2,5-pydc ligands, forming the 6-connected node, and the 2,5-pydc ligand coordinates to the Ce mode 1, the four oxygen atoms of two carboxyl groups connect neighboring Ce (III) ions, giving 4-connected (4-c) second building unit (SBU- SBU-1 by sharing Ce (1) atoms. In mode 2, the ligand coordinates to the Ce (III) ion from the adjacent chain with the 4-connected (4-c) second building unit (SBU- 1-D ladder from SBU-2 by sharing Ce (1) atoms. Finaally, the structure is extended into a 6 , 4,4-c network. Its photoluminescence property was also investigated.