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Isoreticular 2D uranyl coordination polymers based on the mixed oxalate-succinate linkers

Serezhkin, V.N. ; Grigoriev, M.S. ; Rogaleva, E.F. ; Novikov, S.A. ; Serezhkina, L.B.

Solid state sciences, 2021-02, Vol.112, p.106531, Article 106531 [Periódico revisado por pares]

Elsevier Masson SAS

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  • Título:
    Isoreticular 2D uranyl coordination polymers based on the mixed oxalate-succinate linkers
  • Autor: Serezhkin, V.N. ; Grigoriev, M.S. ; Rogaleva, E.F. ; Novikov, S.A. ; Serezhkina, L.B.
  • Assuntos: Coordination polymers ; Crystal structure ; Topology ; Uranium
  • É parte de: Solid state sciences, 2021-02, Vol.112, p.106531, Article 106531
  • Descrição: Two new oxalate-succinate uranium (VI) compounds with the guanidinium cations were synthesized and studied by single crystal X-ray diffraction, IR spectroscopy, thermogravimetric, and differential thermal analysis. The compounds are (CN3H6)2[(UO2)2(oxal)(suc)2]·4H2O (1) and (CN3H6)2[(UO2)2(oxal)2(suc)]⋅2H2O (2), where oxal = oxalate ion, C2O42− and suc = succinate ion, C4H4O42−. Crystal structures of both phases include 2D [(UO2)2(L)3]2- complexes (l – dicarboxylate ion) with the same ‘graphite sheet’ topological type. However, the coordination numbers of uranium in the sheets are different for the different oxalate: succinate ratio in formula (2:1 or 1:2). The coordination number preference (8 or 7) was found to depend on the oxalate: U(VI) ratio. [Display omitted] •Structures of two uranyl carboxylate coordination polymers were determined by X-ray diffraction.•Both structures contain 2D uranyl oxalte-succinate units.•The 2D units differ in their geometry but have the same topology.•The oxalate: uranyl ratio in the formula was found to determine the uranium coordination number.
  • Editor: Elsevier Masson SAS
  • Idioma: Inglês

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