CFA-4 – a fluorinated metal–organic framework with exchangeable interchannel cations. Issue 20 (10th May 2017)

• Record Type: Journal Article
• Authors: Fritzsche, J.; Grzywa, M.; Denysenko, D.; Bon, V.; Senkovska, I.; Kaskel, S.; Volkmer, D.
• Is Part Of: Dalton transactions. Volume 46:Issue 20(2017)
• Page Start: 6745
• Page End: 6755
• Publication Date: 2017-05-10
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c7dt00582b
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Fluorinated metal–organic frameworkM[CFA-4] contains exchangeable interchannel cations and shows interesting selective and sensitive fluorescence behaviour towards nitroaromatics. Abstract : The syntheses and crystal structures of the fluorinated linker 1, 4-bis(3, 5-bis(trifluoromethyl)- 1H -pyrazole-4-yl)benzene (H2 -tfpb;1 ) and the novel metal–organic framework familyM[CFA-4] (Coordination Framework Augsburg University-4), M[Cu5 (tfpb)3 ] (M = Cu(i ), K, Cs, Ca(0.5)), are described. The ligand1 is fully characterized by single crystal X-ray diffraction, photoluminescence-, NMR-, IR spectroscopy, and mass spectrometry. The copper(i )-containing MOF crystallizes in the hexagonal crystal system within the chiral space group P 63 22 (no. 182) and the unit cell parameters are as follows: a = 23.630(5) Å, c = 41.390(5) Å, V = 20 015(6) Å 3 .M[CFA-4] features a porous 3-D structure constructed from pentanuclear copper(i ) secondary building units {CuI5(pz)6 } − (pz = pyrazolate).Cu(I)[CFA-4] is fully characterized by synchrotron single crystal X-ray diffraction, thermogravimetric analysis, variable temperature powder X-ray diffraction, IR spectroscopy, photoluminescence and gas sorption measurements. Moreover, thermal stability and gas sorption properties ofK[CFA-4] andCu(I)[CFA-4] are compared.