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• 作者：Xiu-Jian Wang ; Zhong-Min Cen ; Qing-Ling Ni ; Xuan-Feng Jiang ; Heng-Chi Lian ; Liu-Cheng Gui ; Hua-Hong Zuo ; Zuo-Yuan Wang
• 刊名：Crystal Growth & Design
• 出版年：2010
• 出版时间：July 7, 2010
• 年：2010
• 卷：10
• 期：7
• 页码：2960-2968
• 全文大小：996K
• 年卷期：v.10,no.7(July 7, 2010)
• ISSN：1528-7505

文摘

Four two-dimensional frameworks {[Nd(dpa)(C₂O₄)(H₂O)]·(H₂O)}_n (1), {[Ln₂(dpa)₂(C₂O₄)₂(H₂O)₂]·(H₂O)}_n (Ln = Eu (2), Gd (3), Tb (4)) (dpa = 2,2′-(2-methylbenzimidazolium-1,3-diyl)diacetate, C₂O₄²⁻ = oxalate) have been synthesized under hydrothermal conditions. The networks were generated via formation of sandwich-like dinuclear secondary building blocks of [Ln₂(dpa)₂(C₂O₄)(H₂O)₂] which are linked to each other, resulting in the formation of the subunit of Ln₂O₂. The variable-temperature magnetic susceptibility studies reveal that complexes 3 and 4 exhibit ferromagnetic interactions, but 2 shows the single Eu³⁺ ion magnetic behavior. Complexes 2 and 4 show characteristic luminescent properties. The lifetime of 2 is 2.24 ms, but that of 4 is 4.30 ms.