کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1331267 | 979000 | 2007 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Water-containing derivative phases of the Srn+1FenO3n+1 series Water-containing derivative phases of the Srn+1FenO3n+1 series](/preview/png/1331267.png)
The n=1, 2, 3 and ∞ members of the homologous series Srn+1FenO3n+1 of layered iron oxides are investigated for their tendency to accept additional layers of water in their crystals. The phases possess a Ruddlesden–Popper-type SrO-(SrO-FeO2)n crystal structure, where the n=∞ limit is nothing but the perovskite structure. It is revealed that the n=1, 2 and 3 phases readily accommodate one or two layers of water between adjacent SrO layers, whereas the n=∞ member which lacks the SrO–SrO double-layer unit remains intact in the presence of water. The speed of the water intercalation process is found to decrease with increasing n. Among the layered water derivatives, the n=2 phase with two water molecules per formula unit, i.e. Sr3Fe2O7·2H2O, was found to be most stable.
Water-containing derivative phases obtained from the homologous series of Srn+1FenO3n+1 Ruddlesden–Popper phases through topotactic water intercalation.Figure optionsDownload as PowerPoint slide
Journal: Journal of Solid State Chemistry - Volume 180, Issue 11, November 2007, Pages 3247–3252