title: CFA-7: an interpenetrated metal-organic framework of the MFU-4 family.
abstract: The novel interpenetrated metal-organic framework CFA-7 (Coordination Framework Augsburg University-7), [Zn5Cl4(tqpt)3], has been synthesized containing the organic linker {H2-tqpt = 6,6,14,14-tetramethyl-6,14-dihydroquinoxalino[2,3-b]phenazinebistriazole}. Reaction of H2-tqpt and anhydrous ZnCl2 in N,N-dimethylformamide (DMF) yields CFA-7 as pseudo-cubic crystals. CFA-7 serves as precursor for the synthesis of isostructural frameworks with redox-active metal centers, which is demonstrated by postsynthetic metal exchange of Zn(2+) by different M(2+) (M = Co, Ni, Cu) ions. The novel framework is robust upon solvent removal and has been structurally characterized by single-crystal X-ray diffraction, TGA and IR spectroscopy, as well as gas sorption (Ar, CO2 and H2).
authors.affiliation: Institute of Physics, Chair of Solid State and Material Science, Augsburg University, Universitaetsstrasse 1, 86159 Augsburg, Germany. dirk.volkmer@physik.uni-augsburg.de.
authors.forename: Phillip
authors.initials: P
authors.lastname: Schmieder
authors.forename: Maciej
authors.initials: M
authors.lastname: Grzywa
authors.forename: Dmytro
authors.initials: D
authors.lastname: Denysenko
authors.forename: Manuel
authors.initials: M
authors.lastname: Hambach
authors.forename: Dirk
authors.initials: D
authors.lastname: Volkmer