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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Novel paramagnetic clays obtained through intercalation of Gd3+-complexes
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Novel paramagnetic clays obtained through intercalation of Gd3+-complexes

机译：通过嵌入Gd3 +录取物获得的新型顺磁粘土

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摘要

Novel paramagnetic lanthanide-exchanged saponite clays, bearing in the interlamellar region positively charged Gd3+-complexes, were synthesized using a hydrothermal approach followed by a classical ion exchange reaction. A detailed characterization was performed to assess the physico-chemical properties of the samples, which showed a hydrodynamic diameter between 50 and 90 nm and good thermal stability. H-1-NMR relaxometric studies in aqueous solution as a function of magnetic field and temperature were carried out to evaluate the local chemical environment of the intercalated paramagnetic centres and their interaction with water molecules. The data indicate a strong interaction of the confined complexes with the lamellae, resulting in a restriction of the local rotational dynamics and of the exchange process of water molecules between the inner coordination sphere of Gd3+ and the bulk. The stability over time in aqueous solutions of varying complexity was also studied by relaxometric techniques.
机译：新的顺磁性镧系元素交换的皂岩粘土，轴承在球衣区域带正电的GD3 +录取中，使用水热方法合成，然后进行经典离子交换反应。进行详细表征以评估样品的物理化学性质，其显示出50至90nm之间的流体动力直径和良好的热稳定性。作为磁场和温度的函数的水溶液中的H-1-NMR放松研究，以评估插入的顺磁心的局部化学环境及其与水分子的相互作用。数据表明狭窄复合物与薄片的强相互作用，导致局部旋转动力学的限制和Gd3 +和块状内部配位球之间的水分子的交换过程。还通过弛豫技术研究了不同复杂性水溶液中随时间的稳定性。

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    Marchesi Stefano; Carniato Fabio; Bisio Chiara; Tei Lorenzo; Marchese Leonardo; Botta Mauro;

  • 作者单位

    Univ Piemonte Orientale Dipartimento Sci &

    Innovaz Tecnol Viale Teresa Michel 11 I-15121 Alessandria Italy;

    Univ Piemonte Orientale Dipartimento Sci &

    Innovaz Tecnol Viale Teresa Michel 11 I-15121 Alessandria Italy;

    Univ Piemonte Orientale Dipartimento Sci &

    Innovaz Tecnol Viale Teresa Michel 11 I-15121 Alessandria Italy;

    Univ Piemonte Orientale Dipartimento Sci &

    Innovaz Tecnol Viale Teresa Michel 11 I-15121 Alessandria Italy;

    Univ Piemonte Orientale Dipartimento Sci &

    Innovaz Tecnol Viale Teresa Michel 11 I-15121 Alessandria Italy;

    Univ Piemonte Orientale Dipartimento Sci &

    Innovaz Tecnol Viale Teresa Michel 11 I-15121 Alessandria Italy;

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  • 正文语种 eng
  • 中图分类 化学;无机化学;
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