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Formation Mechanism and Reversible Expansion and Shrinkage of Magnesium-Based Homochiral Metal-Organic Nanotubes

机译:基于镁的Homochiral金属 - 有机纳米管的形成机理和可逆膨胀和收缩

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摘要

Two pairs of homochiral magnesium phosphonates, namely (R)-, (S)-[Mg(pemp)(H_2O)_2] (1) and (R)-, (S)-Mg_(10)(pemp)_(10)(H_2O)_(10)]·3H_2O (2) are reported (pemp2-=(R)-or (S)-(1-phenylethylamino) methylphosphonate). Compounds 1 show one-dimensional tubular structures. The tube wall is purely inorganic, containing six-membered rings made up of corner-sharing {MgO_5N} octahedra and {PO_3C} tetrahedra. The organic groups reside outside the tube. A bottom-up "direct growing" mechanism is proposed for the formation of the nanotubular structures of 1, based on the electrospray ionization mass spectrometry studies. Compounds 2 display two-dimensional layered structures containing crosslinked squashed nanotubes. Interestingly, the two structures can interconvert reversibly upon temperature and pH modulation. This is the first report of a metal-organic nanotube that can shrink and recover in a reversible manner.
机译:两对膦酸镁膦酸盐,即(r) - ,(s) - [mg(pemp)(h_2o)_2](1)和(r) - ,(s)-mg_(10)(pemp)_(10 报道(H_2O)_(10)·3H_2O(2)(PEMP2 - =(R)-OR(S) - (1-苯基乙基氨基)甲基膦酸盐)。 化合物1显示一维管状结构。 管壁纯属无机,含有由角落分享{MgO_5N}八面叶和{PO_3C} Tetrahedra组成的六元环。 有机组位于管外部。 基于电喷雾电离质谱研究,提出了用于形成1的纳米管结构的自下而上的“直接生长”机构。 化合物2显示含有交联挤压纳米管的二维层状结构。 有趣的是,两个结构可以在温度和pH调节时可逆地互连。 这是金属有机纳米管的第一报告,其可以以可逆的方式收缩和恢复。

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  • 来源
    《Chemistry: A European journal》 |2017年第5期|共7页
  • 作者单位

    State Key Laboratory of Coordination Chemistry Coordination Chemistry Institute School of Chemistry and Chemical Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210023 (P. R. China);

    State Key Laboratory of Coordination Chemistry Coordination Chemistry Institute School of Chemistry and Chemical Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210023 (P. R. China);

    State Key Laboratory of Coordination Chemistry Coordination Chemistry Institute School of Chemistry and Chemical Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210023 (P. R. China);

    State Key Laboratory of Coordination Chemistry Coordination Chemistry Institute School of Chemistry and Chemical Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210023 (P. R. China);

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 应用化学;
  • 关键词

    homochirality; magnesium; metal-organic nanotubes; phosphonates; structural modification;

    机译:初始化;镁;金属 - 有机纳米管;膦酸盐;结构改性;

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