Organo-directed synthesis of a 3-D open-framework mixed-metal oxide, [enH2][Mn3(V2O7)2(H2O)2], incorporating metal trimer building blocks |
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| Institution: | 1. Department of Pharmacology & Toxicology, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt;2. Department of Pharmaceutical Medicinal Chemistry, Faculty of Pharmacy, Horus University-Egypt, New Damietta 34518, Egypt;3. Department of Pharmacology and Biochemistry, Faculty of Pharmacy, Horus University-Egypt, New Damietta, 34518, Egypt;4. Department of Pharmaceutics, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt;1. Wageningen Food & Biobased Research, Wageningen University & Research, Wageningen, the Netherlands;2. Kruislaan 3, 3721 AL Bilthoven, the Netherlands;3. Food Quality & Design Group, Wageningen University & Research, Wageningen, the Netherlands |
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| Abstract: | Synthesis of enH2]Mn3(V2O7)2(H2O)2] 1, the first of a new class of organically derivatized mixed metal oxides, is achieved at pH 8 and 140°C by hydrothermal reaction of Mn3O(OAc)6(py)3]BF4], V2O5, NH2CH2CH2NH2 (en) and H3BO3 in a 0.67: 1: 6: 10 ratio. Crystals of 1 are triclinic P-1, a=5.743(1) Å, b=7.931(1) Å, c=9.313(1) Å, α=68.54(1), β=85.78(1), γ=84.50(1)°, V=392.62(9) Å3. The X-ray structure refined to R=0.025. Compound 1 has an anionic open 3-D framework based on linear tri-manganese units of edge shared Mn(II)O6] octahedra connected through divanadate V2O7] groups. The organic counterions are located in 1-D tunnels generated from six-membered Mn2V4] rings. The temperature dependent magnetic susceptibility of 1 indicates a paramagnetic to anti-ferromagnetic transition with a Néel temperature of 10 K. |
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