The synthesis and photoluminescence of three porous metal-organic frameworks

摘要

Three new metal-organic frameworks (MOFs) based on a new organic ligand, 3,5-bis(3,5-dicarboxylphenxoy) benoic acid (H5L), {[Cd5L2(H2O)(6)]center dot 4H(2)O center dot 6DMF}(n) (1), {[Zn5L2(H2O)(5)]center dot 11H(2)O center dot 8DMA}(n) (2) and {[Zn3L(H2O)3(OH)]center dot 12H(2)O center dot 8DMF}(n) (3), have been synthesized and characterized by single-crystal X-ray diffraction, TGA and FTIR. 1 exhibits a (4,8)-connected 3D networks with Schlafli symbol of (4(10).6(16). 8(3))(4(5).6)(2). 2 shows a 3D networks with a type of tetragonal prism cage (9.5 x 9.5 x 14.6 angstrom). 3 exhibits a (4,4)-connected 3D networks with Schlafli symbol of (6(6)). The fluorescence properties of 1-3 are discussed.