[(Epy)_(2)][MnBr_(2)I_(2)]配合物的合成、晶体结构及发光性能

Synthesis,Crystal Structure and Luminescence Properties of[(Epy)2][MnBr2I2]Complex

室温下,以N-乙基吡啶碘盐(Epy)I和四水溴化锰(MnBr_(2)·4H_(2)O)为原料合成了一种零维发光材料[(Epy)_(2)][MnBr_(2)I_(2)]。对该配合物进行元素含量分析、红外光谱、单晶X射线衍射、粉末X射线衍射、紫外可见吸收光谱、光致发光光谱及X射线激发发射光谱等测试。单晶X射线衍射结果表明:配合物为单斜晶系,C2/c空间群,中心离子Mn(Ⅱ)为四面体构型,晶胞参数为a=2.8255(6)nm,b=0.83971(17)nm,c=1.8360(4)nm。在332 nm紫外光激发下,配合物发出528 nm的绿光,对应于四面体Mn(Ⅱ)配合物的^(4)T_(1)(G)→^(6)A_(1)特征辐射跃迁,荧光寿命为58.85μs,荧光量子产率为58.29%。X射线激发光谱表明配合物发光强度较高,具有X射线荧光性能。

A zero-dimensional luminescent material[(Epy)_(2)][MnBr_(2)I_(2)]was synthesized using N-ethylpyridine iodized salt(Epy)I and manganese bromide tetrahydrate(MnBr_(2)·4H_(2)O)as raw material at room temperature.The complex was tested by element content analysis,infrared spectrum,single crystal X-ray diffraction,powder X-ray diffraction,UV-visible absorption spectrum,photoluminescence spectrum X-ray excitation emission spectrum and so on.The single crystal X-ray diffraction results show that the complex is monoclinic,space group of C2/c,and the central Mn(Ⅱ)has a tetrahedron configuration.The crystal cell parameters are a=2.8255(6)nm,b=0.83971(17)nm,and c=1.8360(4)nm.Under the UV light(λ_(ex)=332 nm),the complex emits green light at 528 nm,corresponding to the tetrahedron Mn(Ⅱ)complex of ^(4)T_(1)(G)→^(6)A_(1) radiation characteristics of the transition.Moreover,the fluorescence lifetime is 58.85μs and the corresponding fluorescence quantum yield is 58.29%.X-ray excitation spectrum shows that the complex has high luminescence intensity,and it has certain X-ray fluorescence properties.