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@ARTICLE{Christoffels:906979,
      author       = {Christoffels, Ronja and Breitenbach , Carinanée Stastny
                      and Weber, Jean Patrick and Körtgen, Lisa and Tobeck,
                      Christian and Wilhelm, Michael and Mathur, Sanjay and
                      Neudörfl, Jörg-Martin and Farid, Majied Sadegh Zadeh and
                      Maslo, Melisa and Strub, Erik and Ruschewitz, Uwe},
      title        = {{U}o{C}-3: {A} {M}etal–{O}rganic {F}ramework with an
                      {A}nionic {F}ramework {B}ased on {U}ranyl {UO} 2 2+ {N}odes
                      and {P}artly {F}luorinated {B}enzene-1,3,5-{T}ribenzoate
                      {L}inkers},
      journal      = {Crystal growth $\&$ design},
      volume       = {22},
      number       = {1},
      issn         = {1528-7483},
      address      = {Washington, DC},
      publisher    = {ACS Publ.},
      reportid     = {FZJ-2022-01792},
      pages        = {681 - 692},
      year         = {2022},
      abstract     = {The reaction of UO2(NO3)2·6H2O with partly fluorinated
                      H3-3F-BTB (BTB3–: benzene-1,3,5-tribenzoate) in
                      N,N-dimethylformamide (DMF) leads to the crystallization of
                      the metal–organic framework (MOF)
                      [(CH3)2NH2][UO2(3F-BTB)]·xDMF, named UoC-3 (UoC: University
                      of Cologne). X-ray single-crystal structure analysis (Pnna,
                      Z = 4) reveals that an anionic framework is formed, in which
                      UO22+ nodes are connected by 3F-BTB3– ligands. Because of
                      the fluorination of the inner ring of the linker, its three
                      benzoate groups are tilted to an “out of plane”
                      arrangement, which leads to the formation of a
                      three-dimensional structure with large pores. This is in
                      contrast to a known uranyl coordination polymer with the
                      unfluorinated BTB3– linker, where an almost coplanar
                      arrangement of the linker leads to graphene-like layers. The
                      high porosity of UoC-3 was confirmed by N2 gas sorption
                      measurements, resulting in SBET = 4844 m2/g. The charge
                      compensating [(CH3)2NH2]+ cation is formed by hydrolysis of
                      DMF. Direct addition of [(CH3)2NH2]Cl to the reaction
                      carried out in ethanol/H2O (v:v, 5:1) leads to the same MOF
                      but with lower crystallinity. When using solvents, which
                      hydrolyze to larger cations (e.g., N,N-diethylformamide
                      (DEF): [(C2H5)2NH2]+ and N,N-di(n-butyl)formamide (DBF):
                      [(C4H9)2NH2]+), again the formation of UoC-3 was found, as
                      confirmed by X-ray single-crystal analysis and X-ray powder
                      diffraction. Thus, no templating effect was achieved with
                      these cations. The exchange of the organic cations by K+
                      turned out to be successful, as revealed by XPS analysis.
                      UoC-3 was also successfully tested to remove approximately
                      $96\%$ radioactive 137Cs+ from aqueous solutions $(93\%$
                      after one regeneration cycle) while retaining its crystal
                      structure.},
      cin          = {INM-5},
      ddc          = {540},
      cid          = {I:(DE-Juel1)INM-5-20090406},
      pnm          = {5253 - Neuroimaging (POF4-525)},
      pid          = {G:(DE-HGF)POF4-5253},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000741655300001},
      doi          = {10.1021/acs.cgd.1c01199},
      url          = {https://juser.fz-juelich.de/record/906979},
}