New 2D and 3D Coordination Polymers by Dehydration of 1∞[MII(tF‐BDC)(H2O)4] (MII = Zn2+, Co2+, Ni2+ and tF‐BDC2– = Tetrafluoroterephthalate). Issue 22 (25th July 2018)

• Record Type: Journal Article
• Authors: Stastny, Carina; Dolfus, Benedikt; Brombach, Christiane T.; Dresen, Dominique; Disch, Sabrina; Glaum, Robert; Ruschewitz, Uwe
• Is Part Of: Zeitschrift für anorganische und allgemeine Chemie. Volume 644:Issue 22(2018)
• Page Start: 1423
• Page End: 1430
• Publication Date: 2018-07-25
• Subjects: Coordination polymer -- Crystal structure -- Tetrafluoroterephthalates -- UV/Vis/NIR spectroscopy -- X‐ray powder diffraction; Chemistry, Inorganic -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1002/zaac.201800228
• Languages: English
• ISSNs: 0044-2313

Abstract

Abstract : By dehydration of the known coordination polymers 1 ∞ [ M II ( tF ‐BDC)(H2 O)4 ] ( M II = Co 2+, Zn 2+ and tF ‐BDC 2– = tetrafluoroterephthalate) the homoleptic anhydrous coordination networks 3 ∞ [M II ( tF ‐BDC)] were obtained as polycrystalline powders. Their crystal structures ( C 2/ c, Z = 4) were solved and refined by means of synchrotron powder diffraction data. These structures are characterized by [ M II O4 ] tetrahedra, which are connected by the tF ‐BDC 2– linkers to form a 3D non‐porous coordination network. The dehydration leads to a change from a [ M II O6 ] octahedral coordination in the hydrate to a tetrahedral coordination sphere in the anhydrous compound. For the cobalt compounds this leads to a color change from pale rose to deep blue upon heating and dehydration, which was analyzed by means of UV/Vis/NIR spectroscopy and measurements of the magnetic susceptibilities. In contrast, 1 ∞ [Ni II ( tF ‐BDC)(H2 O)4 ] can only partly be dehydrated to form 2 ∞ [Ni II ( tF ‐BDC)(H2 O)2 ] ( P 1, Z = 1) with retention of the octahedral [Ni II O6 ] coordination in both compounds. At higher temperatures the tF ‐BDC 2– linker starts to decompose, before a complete dehydration can take place. Abstract :