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Issue 19, 2013
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CFA-2 and CFA-3 (Coordination Framework Augsburg University-2 and -3); novel MOFs assembled from trinuclear Cu(I)/Ag(I) secondary building units and 3,3′,5,5′-tetraphenyl-bipyrazolate ligands

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Abstract

The syntheses of H2-phbpz, [Cu2(phbpz)]·2DEF·MeOH (CFA-2) and [Ag2(phbpz)] (CFA-3) (H2-phbpz = 3,3′,5,5′-tetraphenyl-1H,1′H-4,4′-bipyrazole) compounds and their crystal structures are described. The Cu(I) containing metal–organic framework CFA-2 crystallizes in the tetragonal crystal system, within space group I41/a (no. 88) and the following unit cell parameters: a = 30.835(14), c = 29.306(7) Å, V = 27 865(19) Å3. CFA-2 features a flexible 3-D three-connected two-fold interpenetrated porous structure constructed of triangular Cu(I) subunits. Upon exposure to different kinds of liquids (MeOH, EtOH, DMF, DEF) CFA-2 shows pronounced breathing effects. CFA-3 crystallizes in the monoclinic crystal system, within space group P21/c (no. 14) and the following unit cell parameters: a = 16.3399(3), b = 32.7506(4), c = 16.2624(3) Å, β = 107.382(2)°, V = 8305.3(2) Å3. In contrast to the former compound, CFA-3 features a layered 2-D three-connected structure constructed from triangular Ag(I) subunits. Both compounds are characterized by elemental and thermogravimetric analyses, single crystal structure analysis and X-ray powder diffraction, FTIR- and fluorescence spectroscopy. Preliminary results on oxygen activation in CFA-2 are presented and potential improvements in terms of framework robustness and catalytic efficiency are discussed.

Graphical abstract: CFA-2 and CFA-3 (Coordination Framework Augsburg University-2 and -3); novel MOFs assembled from trinuclear Cu(i)/Ag(i) secondary building units and 3,3′,5,5′-tetraphenyl-bipyrazolate ligands

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Publication details

The article was received on 01 Oct 2012, accepted on 06 Mar 2013 and first published on 07 Mar 2013


Article type: Paper
DOI: 10.1039/C3DT32302A
Citation: Dalton Trans., 2013,42, 6909-6921
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    CFA-2 and CFA-3 (Coordination Framework Augsburg University-2 and -3); novel MOFs assembled from trinuclear Cu(I)/Ag(I) secondary building units and 3,3′,5,5′-tetraphenyl-bipyrazolate ligands

    M. Grzywa, C. Geßner, D. Denysenko, B. Bredenkötter, F. Gschwind, K. M. Fromm, W. Nitek, E. Klemm and D. Volkmer, Dalton Trans., 2013, 42, 6909
    DOI: 10.1039/C3DT32302A

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