| 二维配合物{[Gd(HEDTA)]·3H2O}n的合成，晶体结构和磁性质(英文) |
| Hydrothermal Synthesis, Crystal Structure and Magnetic Properties of a New 2D Gadolinium(Ⅲ) Complex: {[Gd(HEDTA)]·3H2O}n |
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| 摘要: 采用水热法通过Gd2O3与乙二胺四乙酸为配体的反应合成出1个新的具有二维层状结构的钆金属配位聚合物{[Gd(HEDTA)]·3H2O}n(1)。X-射线单晶衍射分析表明，晶体属于正交晶系，Pbca空间群，钆金属离子为八配位的方形反棱镜构型，通过乙二胺四乙酸配体处于相反位置上两个羧基的连接，形成了尺寸为0.666 6 nm×0.669 2 nm的四核钆金属方形构筑单元。这些构筑单元进一步被乙二胺四乙酸配体连接成(4，4)拓扑网络结构。游离水分子和羧酸氧原子间通过氢键作用进一步将二维结构构筑成ABAB顺序的三维超分子网络结构。磁性质测试表明该化合物为反铁磁。 |
| 关键词: 水热合成 钆(Ⅲ)配合物 晶体结构 磁性性质 |
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| Abstract: One new lanthanide coordination polymer, {[Gd(HEDTA)]·3H2O}n (1), (H4EDTA=ethylenediaminete-traacetic acid) with 2D layer structure has been prepared by the hydrothermal synthesis and the structure and magnetic properties were characterized. Complex 1 crystallizes belong to orthorhombic system and has space group Pbca. The GdⅢ ion is eight-coordinated and located at a square-antiprismatic coordination geometry. The Gd(Ⅲ) ions are arrayed by two opposite carboxylate groups of EDTA ligand bridges and form a tetranuclear homometallic Gd4(COO)4 square units with the dimensions of 0.666 6 nm× 0.669 2 nm. The square units are further assembled into a highly ordered (4, 4) net through the carboxylate bridges of EDTA ligands. Hydrogen bonds existes between interstitial water molecules and carboxyl oxygen atoms, as a result, the 2D network are further assembled into a 3D supramolecular network in the ABAB sequence. Magnetic studies indicated that complex 1 shows antiferromagnetic coupling between Gd(Ⅲ) ions. CCDC: 795952. |
| Keywords: hydrothermal synthesis gadolinium complex crystal structure magnetic properties |
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| 李 琳,冯春杰,张玉涛.二维配合物{[Gd(HEDTA)]·3H2O}n的合成，晶体结构和磁性质(英文)[J].无机化学学报,2011,27(5):984-988. |
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