Synthesis, structure and metamagnetic behaviour of a three-dimensional Fe(II) carboxyethylphosphonate: [Fe 3(OH) 2(H 2O) 4(O 3P(CH 2) 2CO 2H) 2] or MIL-38

• Published in: Solid state sciences 2002, Vol.4 (5), p.619-625
• Main Authors: Riou-Cavellec, Myriam, Sanselme, Morgane, Noguès, Marc, Grenèche, Jean-Marc, Férey, Gérard
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Domain effects, magnetization curves, and hysteresis; Exact sciences and technology; Hydrothermal synthesis; Inorganic compounds; Iron(II) carboxyethylphosphonate; Magnetic; Magnetic properties and materials; Magnetic resonances and relaxations in condensed matter, mössbauer effect; Magnetically ordered materials: other intrinsic properties; Magnetization curves, hysteresis, Barkhausen and related effects; Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects; Miscellaneous; Mossbauer effect; other γ-ray spectroscopy; Mössbauer effect; other γ-ray spectroscopy; Open-framework; Physics; Saturation moments and magnetic susceptibilities; Structure of solids and liquids; crystallography; Structure of specific crystalline solids
• ISSN: 1293-2558; 1873-3085
• DOI: 10.1016/S1293-2558(02)01305-5

[Fe II 3(OH) 2(H 2O) 4(O 3P(CH 2) 2CO 2H) 2] labelled MIL-38 was hydrothermally synthesized (170 °C, 48 h, autogeneous pressure). Its three-dimensional open structure was solved by single crystal X-ray diffraction (monoclinic, space group P2 1/c (No. 14), a=4.6308(5), b=10.4322(10), c=17.711(2) Å, β=96.051(2)°, Z=2, V=850.8(2) Å 3). It is built up from linear trimers of edge-sharing iron(II) octahedra linked by organic moieties thus delimiting empty channels along [1 0 0] . This new compound was characterized by 57Fe Mössbauer spectrometry and magnetic measurements: it adopts a metamagnetic behaviour below 10 K, antiferromagnetic at low fields and ferromagnetic above 1.5 T. Graphic