Extended Members of the Layered Rare‐Earth Hydroxide Family, RE
<sub>2</sub>
(OH)
<sub>5</sub>
NO
<sub>3</sub>
<b>·</b>
<i>n</i>
H
<sub>2</sub>
O (RE = Sm, Eu, and Gd): Synthesis and Anion‐Exchange Behavior
作者:Kyung‐Hee Lee、Song‐Ho Byeon
DOI:10.1002/ejic.200801052
日期:2009.3
Three new layered rare-earth hydroxides (LRHs), RE(OH)2.5(NO3)0.5·xH2O (RE = Gd, Eu, and Sm), have been prepared by a hydrothermal reaction. These materials correspond to the extended members of the RE2(OH)5NO3·nH2O (RE = the rare-earth series) family. Although it has been suggested that the LRH structure seems to be kinetically favored by yttrium or (the second half of) the small rare-earth ions,
通过水热反应制备了三种新的层状稀土氢氧化物 (LRH),RE(OH)2.5(NO3)0.5·xH2O(RE = Gd、Eu 和 Sm)。这些材料对应于 RE2(OH)5NO3·nH2O(RE = 稀土系列)家族的扩展成员。尽管有人认为 LRH 结构似乎在动力学上更受钇或(后半部分)小稀土离子的青睐,但适当控制水热反应的 pH 条件可以将该族扩展到更大的稀土离子本研究中的离子。在层状稀土氢氧化物 RE2(OH)5NO3·nH2O (RE = Gd、Eu 和 Sm)。LRH 主体和一些选定的有机阴离子交换衍生物的 FTIR 光谱清楚地显示不存在硝酸盐,并且在交换反应后出现归因于羧酸盐和磺酸盐基团的特征带。尽管层间距大幅扩大,层状氢氧化钆和长烷基链阴离子交换衍生物表现出类似的顺磁行为。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany