Syntheses, characterizations and properties of five new metal–organic complexes based on flexible ligand 4,4′-(phenylazanediyl)dibenzoic acid
2012; Royal Society of Chemistry; Volume: 15; Issue: 3 Linguagem: Inglês
10.1039/c2ce26521d
ISSN1466-8033
AutoresJian‐Liang Zhou, Yuanyuan Wang, Ling Qin, Ming‐Dao Zhang, Qingxiang Yang, He‐Gen Zheng,
Tópico(s)Crystal structures of chemical compounds
ResumoFive new metal–organic frameworks have been synthesized under hydrothermal conditions, in CH3CN–H2O, DMF–CH3CH2OH–H2O and DMA–H2O, namely, [ZnL(bimx)0.5]n (1), {[CoL(4,4′-bipy)]·DMF}n (2), {[CdL(4,4′-bipy)]·DMF}n (3), {[ZnL(bibp)]·DMA·(H2O)2}n (4), {[CoL(bpyb)0.5]·(H2O)2}n (5) (bimx = 1,4-bis(imidazol-1-ylmethyl)benzene, 4,4′-biby = 4,4-pyridine, bibp = 4,4′-bis(imidazol-1-yl)biphenyl, bpyb = 1,4-bis(4-pyridyl)benzene, H2L = 4,4′-(phenylazanediyl)dibenzoic acid. These complexes were characterized by elemental analysis, IR spectroscopy, TG and X-ray single-crystal diffraction. In compounds 1, 2 and 3, the bimx, 4,4′-bipy and L2− anions act as bidentate ligands assembling with metal cations to form two-dimensional (2D) sheets. The sheets are stacked in ABAB fashion and accumulate into a 3D framework. Compound 4 possesses a 3D→3D 4-fold interpenetrating architecture with {65·8} topological net, which is similar to the cds topology. Compound 5 also displays a 3D structure with {44·610·8} topology. The photochemical properties were investigated in the solid state at room temperature. The luminescent properties of compounds 1, 3 and 4 are discussed in detail. The UV-vis absorption spectra of compounds 2 and 5 are tested and discussed. In addition, the magnetic properties of compound 5 also are tested and simply analyzed.
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