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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Efficient X-ray scintillating lead(ii)-based MOFs derived from rigid luminescent naphthalene motifs
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Efficient X-ray scintillating lead(ii)-based MOFs derived from rigid luminescent naphthalene motifs

机译：高效的X射线闪烁铅（II）基于刚性发光萘基序的基础MOF

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Solid-state X-ray scintillators are widely applied in medical imaging and space exploration. However, it is still a great challenge to probe into the intrinsic nature of scintillating behaviour due to the ambiguous structure-function relationship. Herein, four structure-defined X-ray scintillating Pb(II)-based metal-organic frameworks (SMOFs) were successfully obtained under solvothermal conditions, [Pb(1,4-ndc) (DMF)](n) (SMOF-1), [Pb(1,4-ndc)(DMA)](n) (SMOF-2), [Pb-2(2,6-ndc)(2)(H2O)](n)center dot nDMF (SMOF-3) and [Pb-4(2,6-ndc)(3)Cl-2] n (SMOF-4), where 1,4-H(2)ndc = 1,4-naphthalene dicarboxylate, 2,6-H(2)ndc = 2,6-naphthalene dicarboxylate, DMF = N,N-dimethylformamide, and DMA = N,N-dimethylacetamide. SMOFs 1-4 show scintillating signals under X-rays triggered by a highly purified tungsten target. Compared with SMOFs 1-3, SMOF-4 exhibits excellent scintillating performance owing to its solvent-free and denser structure, which favours more efficient conversion ability of X-rays to visible light. X-ray stimulated luminescence (XSL) spectra present multiple emission peaks, which is further confirmed by wavelength-dependent luminescence spectra under UV-Vis light, and density of state and DFT calculations. The synergistic effects of heavy metal Pb(II) centres as effective X-ray absorbers and organic ligands as luminescent motifs endow these Pb(II)-based MOFs with application prospects in X-ray detection.
机译：固态X射线闪烁体广泛应用于医学成像和空间探索。然而，由于模糊的结构功能关系，探讨了闪烁行为的内在性质仍然是一个巨大的挑战。在此，在溶剂热条件下成功获得了四种结构定义的X射线闪烁PB（II）基础金属 - 有机骨架（SMOFS）[PB（1,4-NDC）（DMF）]（N）（SMOF-1 ），[Pb（1,4-NDC）（DMA）]（N）（SMOF-2），[PB-2（2,6-NDC）（2）（2）（H2O）]（N）中心点NDMF（SMOF -3）和[PB-4（2,6-NDC）（3）C1-2] N（SMOF-4），其中1,4-H（2）Ndc = 1,4-萘二羧酸盐，2,6 -H（2）NdC = 2,6-萘二羧酸甲酯，DMF = N，N-二甲基甲酰胺和DMA = N，N-二甲基乙酰胺。 SMOFS 1-4显示通过高度纯化的钨靶引发的X射线下的闪烁信号。与SMOFS 1-3相比，由于其无溶剂和密度结构，SMOF-4表现出优异的闪烁性能，这使得X射线更有效地转化为可见光。 X射线刺激的发光（XSL）光谱呈现多个发射峰，其通过UV-Vis光下的波长依赖性发光光谱进一步证实，以及状态和DFT计算的密度。重金属Pb（II）中心作为有效X射线吸收剂和有机配体作为发光基序的协同作用赋予这些PB（II）基于X射线检测的施用前景的MOF。

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    Lu Jian; Xin Xue-Huan; Lin Yang-Jie; Wang Shuai-Hua; Xu Jian-Gang; Zheng Fa-Kun; Guo Guo-Cong;

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    Chinese Acad Sci Fujian Inst Res Struct Matter State Key Lab Struct Chem Fuzhou 350002 Fujian Peoples R China;

    Chinese Acad Sci Fujian Inst Res Struct Matter State Key Lab Struct Chem Fuzhou 350002 Fujian Peoples R China;

    Chinese Acad Sci Fujian Inst Res Struct Matter State Key Lab Struct Chem Fuzhou 350002 Fujian Peoples R China;

    Chinese Acad Sci Fujian Inst Res Struct Matter State Key Lab Struct Chem Fuzhou 350002 Fujian Peoples R China;

    Chinese Acad Sci Fujian Inst Res Struct Matter State Key Lab Struct Chem Fuzhou 350002 Fujian Peoples R China;

    Chinese Acad Sci Fujian Inst Res Struct Matter State Key Lab Struct Chem Fuzhou 350002 Fujian Peoples R China;

    Chinese Acad Sci Fujian Inst Res Struct Matter State Key Lab Struct Chem Fuzhou 350002 Fujian Peoples R China;

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  • 中图分类 化学;无机化学;
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