Mn(Ⅱ)基金属配合物的合成、结构和光致发光性质

Synthesis, Structure, and Photoluminescence Properties of Mn(Ⅱ)-Based Metal Complex

采用溶剂蒸发法合成了一例新型Mn基金属配合物晶体Mn(choline)Cl_(3)(choline=C_(5)H_(14)NO^(+)).单晶X射线衍射分析表明该化合物的晶体结构包含由共边的[MnCl_(5)O]八面体形成的一维链,链与链通过分子间氢键形成三维网络结构.紫外可见吸收光谱和荧光光谱分析表明该化合物在紫外光激发下表现出由(t_(2g))^(3)(e_(g))^(2)到(t_(2g))^(4)(e_(g))^(1)的dd电子跃迁导致的红色光致发光性质,其量子产率为37.32%,荧光寿命为1.18 ms.此外,它还具有优异的热稳定性(300℃).这些结果表明,该Mn(Ⅱ)基金属配合物在光电子材料领域有着潜在的应用前景.

A novel Mn-based complex of Mn(choline)Cl_(3)(choline=C_(5)H_(14)NO)was synthesized by solvent evaporation.Single crystal X-ray diffraction analysis shows that the crystal structure of this complex consists of one-dimensional chains formed by the edge-shared[MnCl_(5)O]octahedra,and these chains link each other with the adjacent ones into a three-dimensional network through intermolecular hydrogen bonds.UV-vis absorption spectrum and photoluminescence spectrum shows that this complex exhibited high efficient red-light emission induced by the dd electron transition of(t_(2g))^(3)(e_(g))^(2) to(t_(2g))^(4)(e_(g))^(1).The photoluminescence quantum yield reaches to 37.32%and the average lifetime is 1.18 ms.In addition,it has excellent thermal stability(300℃).These results show that this Mn-based complex has potential applications in the field of optoelectronic devices.