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水结构在生物镁系统中的潜在作用。

Possible role of water structure in biological magnesium systems.

作者信息

Theophanides T, Angiboust J F, Polissiou M, Anastassopoulou J, Manfait M

机构信息

Laboratoire de Spectroscopie Biomoléculaire, Université de Reims, France.

出版信息

Magnes Res. 1990 Mar;3(1):5-13.

PMID:2397166
Abstract

Magnesium chloride-water solutions have been studied by Fourier Transform Infrared Spectroscopy (FT-IR) in the near infrared region, 5000-10,000 cm-1. The effect of the concentration of magnesium chloride and temperature on the solutions has been studied from the spectra and it is concluded that magnesium chloride modifies the structure of the bulk water. The important absorption bands of water at 5200 and 7020 cm-1 may be assigned to combination vibrations and overtones. They are shifted either by increasing the magnesium chloride concentration or the temperature. The hydrated magnesium ions, [Mg(H2O)6]2+, will most probably break important hydrogen bonds in the clusters of water (H2O)n, where n = 2, 3, 4, 5, 6.../forming new hydrogen bonds in the presence of hexa-aquated magnesium cations. FAB mass spectra also suggest the formation of hydrated magnesium cations, Mg (H2O)6(2+).

摘要

通过傅里叶变换红外光谱(FT-IR)在5000 - 10,000厘米⁻¹的近红外区域对氯化镁 - 水溶液进行了研究。从光谱中研究了氯化镁浓度和温度对溶液的影响,得出氯化镁会改变大量水的结构的结论。在5200和7020厘米⁻¹处水的重要吸收带可能归因于组合振动和泛音。它们会因增加氯化镁浓度或温度而发生位移。水合镁离子[Mg(H₂O)₆]²⁺很可能会破坏水簇(H₂O)ₙ(其中n = 2、3、4、5、6...)中的重要氢键,在六水合镁阳离子存在的情况下形成新的氢键。快原子轰击质谱(FAB)也表明形成了水合镁阳离子Mg(H₂O)₆²⁺ 。

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