Oxyfluorinated Open Framework Compounds
Oxyfluorinated Open Framework Compounds
复制标题
氧氟化开放框架化合物
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
G. Férey
中科院分区：
文献类型：
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作者：
M. Cavellec;C. Egger;J. Linares;M. Nogués;F. Varret;G. Férey
[Fe 3 (PO 4 ) 3 F 2 , (CH 3 NH 3 ) 2 , H 2 O] or ULM-4 is a new iron phosphate with an open framework synthesized by a hydrothermal method (72 h at 453 K). The structure was solved by X-ray diffraction on single crystal. ULM-4 crystallizes in the monoclinic system (space group P 2 1 / n (no. 14)) with cell parameters at 293 K: a =8.8494(1), b =10.3728(1), c =16.9471(1) A, β =92.869°(1), V =1553.68 (2) A 3 , Z =4. Its structure was refined to R 1 ( F 0 )=0.0276, w R 2 ( F 2 0 )=0.0741 (5033 independent reflections with I >2 σ ( I )). This compound is isostructural with the oxyfluorinated gallophosphate ULM-4. Its three-dimensional framework is built up from corner-sharing hexameric units, thus delimiting 10-membered channels along [010] in which methylamine and water molecules are inserted. It also exhibits 8-membered channels along [100]. A phase transition occurs at 265 K. This new compound exhibits an antiferromagnetic behavior below 25(1) K. Mossbauer spectrometry confirms the crystallographic results.
