title: Anion-directed assemblies of cationic metal-organic frameworks based on 4,4'-bis(1,2,4-triazole): syntheses, structures, luminescent and anion exchange properties.
abstract: Three cationic metal-organic frameworks (MOFs), Ag(btr)·PF6·0.5CH3CN (1), Ag2(btr)2(H2O)·2CF3SO3·H2O (2), and Ag2(btr)2(NO3)·NO3 (3), were prepared from reaction of 4,4'-bis(1,2,4-triazole) (btr) with silver salts containing different anions. Complex 1 is a three-dimensional (3-D) framework constructed from tetrahedral-shaped nanoscale coordination cages with PF6(-) as counteranions. 2 and 3 are 3-D architectures containing 1-D channels, in which charge-balancing CF3SO3(-) and NO3(-) are located in their respective channels. Luminescent emission of 1-3 shows an obvious red shift compared with the btr ligand. Anion exchange studies show that 1 is able to selectively exchange MnO4(-) in aqueous solution with a modest capacity of 0.56 mol mol(-1); the luminescent emission of 1 is quickly quenched upon MnO4(-) exchange.
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, 350002, China.
authors.forename: Xinxiong
authors.initials: X
authors.lastname: Li
authors.forename: Yaqiong
authors.initials: Y
authors.lastname: Gong
authors.forename: Huaixia
authors.initials: H
authors.lastname: Zhao
authors.forename: Ruihu
authors.initials: R
authors.lastname: Wang
mesh_terms: D000838:Anions / Q000737:chemistry*; D002412:Cations; D018360:Crystallography, X-Ray; D008024:Ligands; D008163:Luminescent Measurements; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D012834:Silver / Q000737:chemistry*; D014230:Triazoles / Q000737:chemistry*
chemical_list: D000838:Anions; D002412:Cations; D008024:Ligands; D009942:Organometallic Compounds; D014230:Triazoles; D012834:Silver