title: Microporous metal-organic framework constructed from heptanuclear zinc carboxylate secondary building units.
abstract: A novel, three-dimensional, noninterpenetrating microporous metal-organic framework (MOF), [Zn7O2(pda)5(H2O)2]5 DMF4 EtOH 6 H2O (1) (H2PDA=p-phenylenediacrylic acid, DMF=N,N-dimethylformamide, EtOH=ethanol), was synthesized by constructing heptanuclear zinc carboxylate secondary building units (SBUs) and by using rigid and linear aromatic carboxylate ligands, PDA. The X-ray crystallographic data reveals that the seven zinc centers of 1 are held together with ten carboxylate groups of the PDA ligands and four water molecules to form a heptametallic SBU, Zn7O4(CO2)10, with dimensions of 9.8 x 9.8 x 13.8 A3. Furthermore, the heptametallic SBUs are interconnected by PDA acting as linkers, thereby generating an extended network with a three-dimensional, noninterpenetrating, intersecting large-channel system with spacing of about 17.3 A. As a microporous framework, polymer 1 shows adsorption behavior that is favorable towards H2O and CH3OH, and substantial H2 uptake. In terms of the heptanuclear zinc carboxylate SBUs, polymer 1 exhibits interesting photoelectronic properties, which would facilitate the exploration of new types of semiconducting materials, especially among MOFs containing multinuclear metal carboxylate SBUs.
authors.affiliation: State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China.
authors.forename: Qian-Rong
authors.initials: QR
authors.lastname: Fang
authors.forename: Guang-Shan
authors.initials: GS
authors.lastname: Zhu
authors.forename: Ming
authors.initials: M
authors.lastname: Xue
authors.forename: Qing-Lin
authors.initials: QL
authors.lastname: Zhang
authors.forename: Jin-Yu
authors.initials: JY
authors.lastname: Sun
authors.forename: Xiao-Dan
authors.initials: XD
authors.lastname: Guo
authors.forename: Shi-Lun
authors.initials: SL
authors.lastname: Qiu
authors.forename: Shi-Tao
authors.initials: ST
authors.lastname: Xu
authors.forename: Ping
authors.initials: P
authors.lastname: Wang
authors.forename: De-Jun
authors.initials: DJ
authors.lastname: Wang
authors.forename: Yen
authors.initials: Y
authors.lastname: Wei