Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.
Inorg Chem. 2012 Mar 5;51(5):3088-93. doi: 10.1021/ic202516z. Epub 2012 Feb 23.
Rare earth borates are important due to their excellent properties, especially for optics. Here, we report the hydrothermal synthesis and structural determination by single-crystal X-ray diffraction of two new samarium polyborates with layered structures, being constituted by hexaborate chains. These hexaborate chains are connected by samarium polyhedra, forming dense sheets that further interact with each other by hydrogen bonding via isolated boric acid between these sheets. The third phase possesses a three-dimensional framework structure. The thermal stability of selective samples has been studied. The crystallization of samarium borate depends highly on the experimental conditions. Three samarium polyborates have been crystallized in very similar experimental conditions, clearly indicating that new lanthanide borate compounds with tailored structures may be prepared in the future by careful choice of physicochemical conditions.
由于其优异的性质，尤其是在光学方面，稀土硼酸盐非常重要。在这里，我们报告了两种具有层状结构的新型钐多硼酸盐的水热合成和单晶 X 射线衍射结构测定，它们由六硼酸盐链组成。这些六硼酸盐链通过钐多面体连接，形成密集的薄片，通过这些薄片之间的孤立硼酸通过氢键进一步相互作用。第三相具有三维骨架结构。研究了选择性样品的热稳定性。硼酸钐的结晶高度依赖于实验条件。在非常相似的实验条件下已经结晶出了三种钐多硼酸盐，这清楚地表明，通过仔细选择物理化学条件，未来可能会制备出具有定制结构的新型镧系硼酸盐化合物。
