| Autor: |
Beaubras, Félicien, Rueff, Jean-Michel, Perez, Olivier, Veillon, Fabien, Caignaert, Vincent, Lohier, Jean-François, Cardin, Julien, Rogez, Guillaume, Jestin, Charlotte, Couthon, Hélεave;ne, Jaffrεave;s, Paul-Alain |
| Předmět: |
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| Zdroj: |
Dalton Transactions: An International Journal of Inorganic Chemistry; 3/28/2020, Vol. 49 Issue 12, p3877-3891, 15p |
| Abstrakt: |
Four new metallophosphonates M(H2O)(PO3C10H6OH)·(H2O)0.5 (M = Mn, Co, Cu, Zn) were obtained as single crystal and polycrystalline powders by hydrothermal synthesis from the precursors 6-hydroxy-2-naphthylphosphonic acid and the corresponding metal salts. These analogous hybrids crystalized in the space group P121/c1 in a lamellar structure. Their layered structures consisted of inorganic [M(H2O)(PO3C)] layers stacked with organic bilayers of 6-hydroxy-2-naphthyl moieties "HO–C10H6" and free water molecules. Their structures were determined by single crystal X-ray diffraction and confirmed by powder X-ray diffraction and Le Bail refinement for the powder sample. The removal of water upon heating at 250 °C was studied by thermogravimetric analysis and temperature-dependent powder X-ray diffraction. Their magnetic properties were studied by SQUID magnetometry and show antiferromagnetic behavior for the Co analogue and the occurrence of a canted antiferromagnetic order at TN = 12.2 K for the Mn analogue. The Cu compound displayed an unprecedented ferromagnetic behavior. Their absorption and luminescence properties were investigated and revealed that the ligand and the compounds displayed a common behavior below a wavelength of 400 nm. Specific absorption bands were found in the compounds with Co2+ and Cu2+ at 539 nm and 849 nm, respectively. Moreover, particular luminescence bands were found for the compounds with Mn2+, Co2+ and Zn2+ at 598 nm, 551 nm and 530 and 611 nm, respectively. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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