| 含有(2-吡啶甲基)胺基甲基膦酸与草酸配体的同构稀土(Gd，Tb)化合物的合成、结构、磁学和荧光性质(英文) |
| Isostructural Lanthanide (Gd, Tb) Oxalatophosphonates with 2-Pyridylmethylamino)methyl Phosphonic Acid: Syntheses, Structures, Magnetic and Fluorescent Properties |
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| 摘要: 利用水热合成手段，(2-吡啶甲基)胺基甲基膦酸、草酸盐与醋酸钆(或醋酸铽)配位组装得到2个同构的稀土化合物Ln2(pmampH)(C2O4)2.5(H2O)3·4H2O(Ln=Gd (1),Tb (2))。在2个化合物中，网状的{Ln2(C2O4)2.5}n层通过{LnO8}多面体与{PO3C}四面体的共角连接，形成三维开放结构。沿b方向，可以观察到一维孔道，它们被未配位的(2-吡啶甲基)胺基以及晶格水分子占据。化合物2在部分或全部脱去结构中的配位以及晶格水以后，可以保持它的骨架结构。磁性研究表明化合物1表现出顺磁行为，2则表现出主要的铁磁性相互作用。化合物2以及它的脱水产物的荧光性质也被测定，都表现出Tb(Ⅲ)的特征发射，能够发出绿光。 |
| 关键词: 稀土 (2-吡啶甲基)胺基甲基膦酸 草酸盐 晶体结构 磁性 荧光 |
| 基金项目: |
| Abstract: Two isostructural lanthanide oxalatophosphonates Ln2(pmampH)(C2O4)2.5(H2O)3·4H2O (Ln=Gd (1), Tb (2)) have been obtained through hydrothermal reactions of (2-pyridylmethylamino)methyl phosphonic acid (pmampH2), oxalate, and Gd/Tb salts. Both compounds exhibit 3D open framework, in which the netlike {Ln2(C2O4)2.5}n layer containing Ln10(C2O4)10 rings are connected through corner-sharing {LnO8} polyhedra and {PO3C} tetrahedra, generating channels along b axis filled with the pendant 2-pyridylmethylamino groups and lattice water molecules. The framework of 2 can be retained after partly or completely releasing coordination and lattice water molecules. The magnetic studies show that the presence of paramagnetic behavior in 1, while dominant ferromagnetic interactions in 2. The solid-state fluorescent measurements reveal that 2 and its dehydration products can emit green light, exhibiting characteristic transitions of Tb(Ⅲ). CCDC: 806907, 1; 806908, 2. |
| Keywords: lanthanide (2-pyridylmethylamino)methyl phosphonic acid oxalate crystal structure magnetic property fluorescent property |
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| 刘美娟,曹登科,黄 建,鲍松松,郑丽敏.含有(2-吡啶甲基)胺基甲基膦酸与草酸配体的同构稀土(Gd，Tb)化合物的合成、结构、磁学和荧光性质(英文)[J].无机化学学报,2012,28(9):2017-2024. |
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