화학공학소재연구정보센터
Inorganic Chemistry, Vol.50, No.6, 2159-2167, 2011
Ionothermal Synthesis and Magnetic Studies of Novel Two-Dimensional Metal-Formate Frameworks
Five novel two-dimensional frameworks containing formate-bridged metal-centered octahedra are synthesized ionothermally from two ionic liquids previously unused as solvents in hybrid synthesis, 2-hydroxyethylammonium (HEA) formate, and 1-hydroxy-3-proplyammonium (HPA formate. Templating effects of the cation from each ionic liquid drive the formation of different structures. [NH3C2H4OH](2)[M(CHO2)(4)] (1: M = Co, 2: M = Ni) exhibit the same stoichiometry and connectivity as their manganese analogue (3: M = Mn), but the manganese form exhibits a different topology from 1 and 2. [NH3C3H6OH][M(CHO2)(3)(H2O)] (4: M = Co, 5: M = Mn) were synthesized using the HPA formate ionic liquid with a metal formate connectivity related to those of 1-3. Canted antiferromagnetic ordering occurs at low temperatures (1: T-N = 7.0 K, 2: T-N = 41.6 K, 3: T-N = 8.0 K, 4: T-N = 7.0 K, 5: T-N = 9.2 K), similar to the magnetic properties previously reported for other metal formate hybrid materials.