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首页> 外文期刊>Crystal growth & design >White-Light-Emitting Materials and Highly Sensitive Detection of Fe3+ and Polychlorinated Benzenes Based on Ln-Metal-Organic Frameworks
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White-Light-Emitting Materials and Highly Sensitive Detection of Fe3+ and Polychlorinated Benzenes Based on Ln-Metal-Organic Frameworks

机译:基于LN金属 - 有机框架的白光发光材料和高敏感的Fe3 +和多氯苯的检测

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摘要

We employed a rigid bridging-type tetracarboxylic acid molecule, namely, 5,5'-(pyridine-3,5-diyl)diisophthalic acid (H4L; containing two isophthalic acid moieties and one pyridine spacer), to construct three new isomorphic Ln-metal-organic framework (Ln-MOF) materials [(CH3)(2)NH2](2)[Ln(2)(L)(2)(H2O)]center dot 2DMF center dot 2H(2)O (Ln(3+) = Tb3+ 1, Eu3+ 2, Gd3+ 3; DMF = N,N-dimethylformamide). Since the pyridyl N atom does not coordinate to Ln 3 +, the larger pores are observed in the three-dimensional networks of 1-3. On the basis of their photoluminescence properties, the white-light-emitting materials 4-7 with longer fluorescence lifetime (millisecond grade) and higher quantum yield (e.g., 48.29% for 5) are fabricated. We also find that the title Ln-MOF materials not only can selectively sense polychlorinated benzenes, but also can highly sensitively detect the Fe3+ ion (K-sv = 7.58 X 10(4) M-1). This should be associated with these three structural factors in 1-3: the larger it-conjugated structure of L4-; the larger porous structures in 1-3; and the existence of uncoordinated N atom on L4-. The test paper experiments reveal that 1 can be made into the test paper (a naked eye probe) to quickly detect the analytes.
机译:我们采用刚性桥接型四羧酸分子,即5,5' - (吡啶-3,5-二基)二苯二甲酸(H4L;含有两个间苯二甲酸部分和一个吡啶间隔物),以构建三个新的同构Ln-金属有机框架(LN-MOF)材料[(CH3)(2)NH 2](2)[LN(2)(1)(2)(2)(H2O)]中心点2DMF中心点2H(2)O(LN( 3+)= TB3 + 1,EU3 + 2,GD3 + 3; DMF = N,N-二甲基甲酰胺)。由于吡啶基N原子不与LN 3 +坐标,因此在1-3的三维网络中观察到较大的孔。基于它们的光致发光性质,制造具有较长荧光寿命(毫秒)和更高量子产率(例如,5)的白光发光材料4-7。我们还发现标题LN-MOF材料不仅可以选择性地检测多氯苯,还可以高灵敏度地检测Fe3 +离子(K-SV = 7.58×10(4)M-1)。这应该与这三个结构因子有关1-3:L4-的较大的IT缀合结构; 1-3中的较大多孔结构;并在L4-上存在不协调的n原子。试验纸实验表明,可以将1-进入试验纸(肉眼探针)以快速检测分析物。

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  • 来源
    《Crystal growth & design》 |2018年第9期|共12页
  • 作者单位

    Jilin Univ State Key Lab Inorgan Synth &

    Preparat Chem Coll Chem Changchun 130012 Jilin Peoples R China;

    Jilin Univ State Key Lab Inorgan Synth &

    Preparat Chem Coll Chem Changchun 130012 Jilin Peoples R China;

    Jilin Univ Lab Theoret &

    Computat Chem Inst Theoret Chem Changchun 130023 Jilin Peoples R China;

    Jilin Univ State Key Lab Inorgan Synth &

    Preparat Chem Coll Chem Changchun 130012 Jilin Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 晶体学;
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