Novel Metastable Structures of WO3, MoO3 and W1‐xMoxO3 Obtained by the Deintercalation of Layered Amine Adducts
Novel Metastable Structures of WO3, MoO3 and W1‐xMoxO3 Obtained by the Deintercalation of Layered Amine Adducts
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通过层状胺加合物脱嵌获得WO3、MoO3和W1-xMoxO3的新型亚稳态结构
DOI：
10.1002/chem.19950010305
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
C. Rao
中科院分区：
文献类型：
--
作者：
S. Ayyappan;G. Subbanna;C. Rao
从WO_3、MoO_3和W_(1-x)Mo_xO_3的层状胺加合物中脱插胺被用作一种软化学方法来产生不寻常的亚稳态氧化物结构。在表征了WO_3、MoO_3和W_(1-x)Mo_xO_3(x=0.25、0.5、0.75)与三乙胺(TEA)、吡啶、正丁胺和正辛胺的加合物后，进行了热脱插层和酸浸脱嵌。热脱插层得到了WO_3和MoO_3新的亚稳结构，它们与稳定结构有显著不同，后者含有扭曲的金属-氧八面体。因此，通过对WO_3·0.5TEA进行热脱插层处理，得到了Re_3型立方WO_3。酸浸胺得到了WO_3、MoO_3和W_(1-x)Mo_xO_3亚稳相，这与热法得到的相不同。在较高温度下，所有的亚稳相都转变为相应的稳定相。
Deintercalation of amines from the layered amine adducts of WO3, MoO3 and W1-xMoxO3 has been employed as a soft chemical route to produce unusual metastable structures of the oxides. After the adducts of WO3, MoO3 and W1–xMoxO3 (x = 0.25, 0.5, 0.75) with amines such as triethylamine (TEA), pyridine, n-butylamine and n-octylamine had been characterized, deintercalation was carried out thermally as well as by acid leaching. Thermal deintercalation yielded novel metastable structures of WO3 and MoO3 that were significantly different from the stable forms, which contain distorted metal-oxygen octahedra. Thus, ReO3-type cubic WO3 was obtained by the thermal deintercalation of WO3 · 0.5 TEA. Acid leaching of the amines gave metastable phases of WO3, MoO3 and W1-xMoxO3, which were different from those obtained thermally. All the metastable phases transformed to the corresponding stable forms at higher temperatures.