Temperature dependence of the diamagnetism of water
Temperature dependence of the diamagnetism of water
复制标题
水的抗磁性与温度的关系
DOI：
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复制
发表时间：
1980
期刊：
影响因子：
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通讯作者：
W. Fairbank
中科院分区：
文献类型：
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作者：
J. Philo;W. Fairbank
我们测量了20至60 °C范围内液态水的磁化率。通过使用基于超导技术的新仪器，我们获得了比以前的研究高近两个数量级的精度。值得注意的是，这些数据中没有任何早期研究中报告的热异常的证据。数据随温度变化平稳，在抗磁性的±0.0001%以内，斜率没有突变。这些数据将是有用的磁性研究的分子在水溶液中，校准的目的，并为校正NMR化学位移。随着理论计算的不断改进，应该有可能利用磁化率数据来获得有关液态分子相互作用的有用信息。
We have measured the magnetic susceptibility of liquid water over the 20 to 60 °C range. By using a new instrument based on superconducting technology, we obtain a precision nearly two orders of magnitude higher than previous studies. Notably absent from these data is any evidence for the thermal anomalies reported in several earlier studies. The data vary smoothly with temperature to within ±0.0001% of the diamagnetism, and show no abrupt changes in slope. These data will be useful for magnetic studies of molecules in aqueous solution, for calibration purposes, and for correcting NMR chemical shifts. With continued improvements in theoretical calculations, it should be possible to use magnetic susceptibility data to obtain useful information on molecular interactions in the liquid state.