[(Epy)2][MnBr2I2]配合物的合成、晶体结构及发光性能

摘要/Abstract

摘要： 室温下,以N-乙基吡啶碘盐(Epy)I和四水溴化锰(MnBr₂·4H₂O)为原料合成了一种零维发光材料[(Epy)₂][MnBr₂I₂]。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=2.825 5(6) nm,b=0.839 71(17) nm,c=1.836 0(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⁴T₁(G)→⁶A₁特征辐射跃迁,荧光寿命为58.85 μs,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。

关键词: 离子液体, 锰(Ⅱ)配合物, 晶体结构, 发光性能

Abstract: A zero-dimensional luminescent material [(Epy)₂][MnBr₂I₂] was synthesized using N-ethylpyridine iodized salt (Epy)I and manganese bromide tetrahydrate (MnBr₂·4H₂O) 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=2.825 5(6) nm, b=0.839 71(17) nm, and c=1.836 0(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 ⁴T₁(G) →⁶A₁ radiation characteristics of the transition. Moreover, the fluorescence lifetime is 58.85 μs 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.

Key words: ionic liquid, manganese(Ⅱ) complex, crystal structure, luminescence performance

中图分类号:

O614.7⁺11

杨晨乐, 李凌燕, 李嫚, 沈轶明, 潘尚可, 潘建国. [(Epy)₂][MnBr₂I₂]配合物的合成、晶体结构及发光性能[J]. 人工晶体学报, 2021, 50(2): 345-352.

YANG Chenyue, LI Lingyan, LI Man, SHEN Yiming, PAN Shangke, PAN Jianguo. Synthesis, Crystal Structure and Luminescence Properties of [(Epy)₂][MnBr₂I₂] Complex[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(2): 345-352.

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[(Epy)₂][MnBr₂I₂]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

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