Ln(2)Ga[B3O6(OH)](2)[B7O9(OH)(2)](CH3CO2)(2) (Ln = Y, Sm, Eu, Gd, Dy): A Series of Lanthanide Galloborates Decorated by Acetate Anions
Ln(2)Ga[B3O6(OH)](2)[B7O9(OH)(2)](CH3CO2)(2) (Ln = Y, Sm, Eu, Gd, Dy): A Series of Lanthanide Galloborates Decorated by Acetate Anions
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Ln(2)Ga[B3O6(OH)](2)[B7O9(OH)(2)](CH3CO2)(2) (Ln = Y, Sm, Eu, Gd, Dy)：一系列镧系元素镓硼酸盐
DOI：
10.1021/acs.inorgchem.6b00584
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发表时间：
2016
影响因子：
4.6
通讯作者：
Mao Jiang-Gao
中科院分区：
文献类型：
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作者：
Yang Hui;Hu Chun-Li;Mao Jiang-Gao
通过水热合成得到了第一批混合阴离子镧系镓硼酸盐化合物Ln_2Ga [B_3 O_6（OH）]_2[B_7 O_9（OH）_2]（CH_3CO_2）_2[Ln = Y（1），Sm（2），Eu（3），Gd（4），Dy（5）]。标题化合物均为同晶型，空间群C2/c（No.15）。它们的结构具有[B_7O_（13）（OH）_2]硼酸盐层，并进一步与[B_3O_7]团簇桥接，形成三维硼酸盐骨架，沿轴向显示出两种类型的菱形B_14 O_（14）~（14）环（14-MR）沿着通道。Ga ~（3+）离子以八面体配位，位于B_14O_（14）-MR通道的一端，形成B_7Ga_（8-）-MR通道的小隧道，并被Ln ~（3+）离子填充。Ln离子和Ga阳离子通过桥接乙酸根阴离子进一步保持在一起。值得注意的是，在这些化合物中有两种不同类型的硼酸盐簇和两种类型的阴离子，这是不常见的硼酸盐报告。荧光光谱研究表明，化合物2 -5具有Ln离子的特征发射带，化合物2、3和5的发光寿命分别为3.6、0.86和3.05 ns。磁性测量表明，化合物2 -5的磁性中心之间存在反铁磁相互作用。
The first examples of mixed-anion lanthanide galloborates, namely, Ln2Ga[B3O6(OH)]2[B7O9(OH)2](CH3CO2)2[Ln = Y (1), Sm (2), Eu (3), Gd (4), Dy (5)], have been obtained through hydrothermal synthesis. The title compounds are isomorphic and belong to monoclinic space groupC2/c(No. 15). Their structures possess [B7O13(OH)2] borate layers further bridged with [B3O7] clusters to give a three-dimensional (3D) borate framework displaying two types of rhombus-like B14O1414-membered-ring (14-MR) channels along thebaxis. The Ga3+ions are octahedrally coordinated and located at one end of the B14O1414-MR channels, forming small tunnels of B7Ga 8-MRs, which are filled by the LnIIIions. The Ln ions and Ga cations are further held together by bridging acetate anions. It is worth noting that in these compounds there are two different types of borate clusters and two types of anions that are uncommon in the borates reported. Luminescent studies revealed the characteristic emission bands of Ln ions for compounds2–5, and the luminescent lifetimes are 3.6, 0.86, and 3.05 ns for compounds2,3, and5, respectively. Magnetic measurements suggest that there are antiferromagnetic interactions between magnetic centers for compounds2–5.