Nanochanneled silver-deficient tris(oxalato)chromate(III) coordination polymers: Synthesis, crystal structure, spectroscopy, thermal analysis and magnetism
| Autor: | Boniface P. T. Fokwa, Delia A. Haynes, Augustin N. Nana, Pritam Shankhari, Hervé Vezin, Justin Nenwa, Claire Minaud |
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| Přispěvatelé: | Inorganic Chemistry Department, University of Yaoundé I |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Chromate conversion coating
010405 organic chemistry Chemistry Organic Chemistry Crystal structure Atmospheric temperature range 010402 general chemistry 01 natural sciences 0104 chemical sciences Analytical Chemistry Inorganic Chemistry [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry Crystallography Antiferromagnetism Molecule Orthorhombic crystal system Thermal analysis Spectroscopy ComputingMilieux_MISCELLANEOUS Monoclinic crystal system |
| Zdroj: | Journal of Molecular Structure Journal of Molecular Structure, Elsevier, 2020, 1220, pp.128642. ⟨10.1016/j.molstruc.2020.128642⟩ |
| ISSN: | 0022-2860 |
| DOI: | 10.1016/j.molstruc.2020.128642⟩ |
| Popis: | Two silver-deficient tris(oxalato)chromate(III) coordination polymers, SrK0.5Ag0.5[Cr(C2O4)3] (1) and SrAg[Cr(C2O4)3]⋅6H2O (2) have been synthesized and fully characterized by elemental and TGA-DSC analyses, IR and UV–Vis spectroscopies, single-crystal X-ray diffraction and magnetic measurements. Salt 1 crystallizes in the orthorhombic polar space group Fdd2, whereas 2 crystallizes in the monoclinic space group P21/c. Compared to the well-known salt Ag3[Cr(C2O4)3]⋅3H2O with no silver deficiency, 1 and 2 can be seen as nanochanneled silver-deficient oxalatochromate(III) coordination polymers featuring silver deficiency values of 2.5 and 2.0, respectively. In 1, nanochannels host K+ and Ag+ cations, whereas in 2, they solely host hydrogen-bonded water molecules. The magnetic properties of 1 and 2 have been investigated in the temperature range 2–300 K. The decrease of χMT observed at low temperatures for 1 and 2 revealed weak antiferromagnetic interactions in the two compounds. |
| Databáze: | OpenAIRE |
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