title: Construction of two microporous metal-organic frameworks with flu and pyr topologies based on Zn4(μ3-OH)2(CO2)6 and Zn6(μ6-O)(CO2)6 secondary building units.
abstract: By employment of a tripodal phosphoric carboxylate ligand, tris(4-carboxylphenyl)phosphine oxide (H3TPO), two novel porous metal-organic frameworks, namely, [Zn4(μ3-OH)2(TPO)2(H2O)2] (1) and [Zn6(μ6-O)(TPO)2](NO3)4·3H2O (2), have been synthesized by solvothermal methods. Complexes 1 and 2 exhibit three-dimensional microporous frameworks with flu and pyr topologies and possess rare butterfly-shaped Zn4(μ3-OH)2(CO2)6 and octahedral Zn6(μ6-O)(CO2)6 secondary building units, respectively. Large cavities and one-dimensional channels are observed in these two frameworks. Gas-sorption measurements indicate that complex 2 has a good H2 uptake capacity of 171.9 cm(3) g(-1) (1.53 wt %) at 77 K and 1.08 bar, and its ideal adsorbed solution theory calculation predicts highly selective adsorption of CO2 over N2 and CH4. Furthermore, complexes 1 and 2 exhibit excellent blue emission at room temperature.
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, Fujian 350002, People's Republic of China.
authors.forename: Xing-Jun
authors.initials: XJ
authors.lastname: Li
authors.forename: Fei-Long
authors.initials: FL
authors.lastname: Jiang
authors.forename: Ming-Yan
authors.initials: MY
authors.lastname: Wu
authors.forename: Lian
authors.initials: L
authors.lastname: Chen
authors.forename: Jin-Jie
authors.initials: JJ
authors.lastname: Qian
authors.forename: Kang
authors.initials: K
authors.lastname: Zhou
authors.forename: Da-Qiang
authors.initials: DQ
authors.lastname: Yuan
authors.forename: Mao-Chun
authors.initials: MC
authors.lastname: Hong