Six metal-organic frameworks assembled from asymmetric triazole carboxylate ligands: Synthesis, crystal structures, photoluminescence properties and antibacterial activities

摘要: Abstract Based on an asymmetric 1-(2-carboxyethyl)-1H-1,2,4-triazole-3-carboxylic acid (H2ctp), six new MOFs [Cd(ctp)(H2O)]n (1), [Cd2(ctp)2(phen)]n (2) [phen = 1,10-Phenanthroline monohydrate], [Cd2(ctp)2(pbbbm)(H2O)2]n (3) [pbbbm = 1,4-bis(benzimidazole-1-ylmethyl)benzene)], [Mn(ctp)(H2O)]n (4), {[Pb2(ctp)2]·H2O}n (5) and [Cu(ctp)(H2O)2]n (6) have been synthesized structurally characterized by single-crystal X-ray diffraction, elemental analysis IR spectroscopy. 1, 4 5 display (4,4)-connected 3-D frameworks which all can be simplified into the Schlafli symbol of (42·63·8) with sra topology, while 2 is also a network has (42·84) pts topology. 3 exhibits 2-D structure 3,4L83 topology 6 1-D chain structure. The fluorescent properties 1–3 studied in solid state at room temperature. significantly stronger fluorescence emission than due to its crystal features. antibacterial activities 1–6 against four strains bacteria Bacillus subtilis, Staphylococcus aureus, Salmonella enteritidis Escherichia coli examined. results indicated that better activity subtilis 3, effect chelation, auxiliary ligands Cd(II) ion feature strong toxicity.