New Layered Rare-Earth Hydroxides with Anion-Exchange Properties
New Layered Rare-Earth Hydroxides with Anion-Exchange Properties
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DOI：
10.1002/chem.200800127
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发表时间：
2008-01-01
影响因子：
4.3
通讯作者：
Sasaki, Takayoshi
中科院分区：
文献类型：
--
作者：
Geng, Fengxia;Xin, Hao;Sasaki, Takayoshi
本文报道了一系列新型稀土层状氢氧化物的合成，其组成为RE（OH）（2.5）Cl-0.5中心点0.8H（2）O（RE：Eu，Tb，etc.）通过RECl 3中心点xH（2）O与六次甲基四胺（HMT）的均匀沉淀，Rietveld分析结合直接方法揭示了正交层状结构，其包括带正电荷的[RE（OH）（2.5）（H2O）（0.8）]（0-5+）层和层间Cl-离子。Cl-离子与NO3-、SO 42-、十二烷基磺酸根等阴离子的交换性较好。在环境温度下。光致发光研究表明，这些化合物具有典型的稀土31发光.由于具有稀土基主体层和可调层间客体，新化合物可能对光电、磁性、催化和生物医学材料感兴趣。
We report the synthesis of a new series of layered hydroxides based on rare-earth elements with a composition of RE(OH)(2.5)Cl-0.5 center dot 0.8H(2)O (RE: Eu, Tb, etc.) through the homogeneous precipitation of RECl3 center dot xH(2)O with hexamethylenetetramine (HMT). Rietveld analysis combined with direct methods revealed an orthorhombic layered structure comprising a positively charged layer of [RE(OH)(2.5)(H2O)(0.8)](0-5+) and interlayer Cl- ions. The Cl- ions were readily exchangeable for various anions (NO3-, SO42-, dodecylsulfonate, etc.) at ambient temperature. Photoluminescence studies showed that the compounds display typical RE 31 emission. With rare-earth-based host layers and tunable interlayer guests, the new compounds may be of interest for optoelectronic, magnetic, catalytic, and biomedical materials.