Insertion of Magnetic Bimetallic Oxalate Complexes into Layered Double Hydroxides
Source abstract
Abstract
Bimetallic oxalate complexes have been successfully inserted into layered double hydroxides as ferromagnetic oxalate-bridged oligomers. Different preparation methods afford different sizes and compositions for the oligomers. In all cases, no magnetic ordering has been observed above 2 K.
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Research context
OpenAlex topics: Layered Double Hydroxides Synthesis and Applications · Polyoxometalates: Synthesis and Applications · Mesoporous Materials and Catalysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Instituto de Ciencia Molecular Universidad de Valencia Polígono de la Coma, s/n 46980 Paterna, Spain
References (26)
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18. All manipulations were carried out under an inert atmosphere. Ag3Cr(C2O4)3·xH2O was prepared by methatesis, adding an excess of AgNO3(7.65 g, 45 mmol) to a water (100 mL) solution of K3Cr(C2O4)3·xH2O (4.87 g, 10 mmol). The immediate precipitate obtained of the product is filtered, washed with water and acetone, and dried at room temperature. Procedure A: Ag3Cr(C2O4)3(1.280 g, 2 mmol) and MnCl2·4H2O (2.156 g, 11 mmol) are mixed in 20 mL of a 50% v/v solution of water and ethylene glycol. After filtration of the AgCl precipitate, the LDH MgAl−NO3(170 mg) is suspended and stirred for 90 hours at room temperature; it was later filtered, washed with water until the elimination of nitrate, and finally washed with methanol and dried in air. [Mg2Al(OH)6][NO3]0.59{Mn0.05[Cr(ox)3]0.17}·0.72H2O, Mn0.05N0.59O10.53AlCr0.17Mg2C1.02H7.44,Mw= 283.67. Calcd: N, 2.91; C, 4.32; H, 2.64. Found: N, 3.03; C, 4.59; H, 2.62. Procedure B:The LDH MgAl−NO3(170 mg) was suspended in a solution of [K(18-crown-6)]3{Mn3(H2O)4[Cr(C2O4)3]3} (0.410 g, 0.2 mmol) in 20 mL of water and stirred for 90 hours at room temperature; it was later filtered, washed with water until the elimination of nitrate, and finally washed with methanol and dried in air. [Mg2Al(OH)6][NO3]0.36{Mn0.16[Cr(ox)3]0.32}·0.52H2O, Mn0.16N0.36O11.44AlCr0.32Mg2C1.92H7.04,Mw= 319.25. Calcd: N, 1.57; C, 7.22; H, 2.22. Found: N, 1.63; C, 7.45; H, 2.26.
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