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Hydrothermal Synthesis, Powder Structural Determination, and Magnetic Study of the Novel Hydrated Iron Diphosphonate [Fe2(H2O)2(O3P–CH2–PO3H)2](H2O)2 or MIL-13

✍ Scribed by M. Riou-Cavellec; C. Serre; J. Robino; M. Noguès; J.-M. Grenèche; G. Férey

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
651 KB
Volume
147
Category
Article
ISSN
0022-4596

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✦ Synopsis

Fe 2 (H 2 O) 2 (O 3 P+CH 2 +PO 3 H) 2 ](H 2 O) 2 or MIL-13 was prepared hydrothermally (120 h at 473 K). Its structure was determined by powder X-ray di4raction. This compound crystallizes in the triclinic system (P-1) with the following cell parameters: a ‫؍‬ 9.8487(6) A > , b ‫؍‬ 8.0308(5) A > , c ‫؍‬ 9.9154(5) A > , ‫؍‬ 99.09(1)3, ‫؍‬ 97.91(1)3, ‫؍‬ 89.38(1)3, V ‫؍‬ 766.97 A > 3 , Z ‫؍‬ 2. Its bidimensional structure consists of [Fe 2 (H 2 O) 2 (O 3 P+CH 2 + PO 3 H) 2 ] sheets, between which are located water molecules. The thermal study indicates that this compound undergoes several phase transitions. Moreover, this new iron diphosphonate shows a 2D antiferromagnetic behavior below 13(1) K, but remains paramagnetic at 4.2 K as shown by MoK ssbauer spectroscopy.

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