Sichuan University, Chengdu, P R China.
Int J Mol Sci. 2009 Mar;10(3):1261-70. doi: 10.3390/ijms10031261. Epub 2009 Mar 17.
In this paper, the dielectric properties of water-dimethylsulfoxide (DMSO) mixtures with different mole ratios have been investigated in the range of 1 GHz to 40 GHz at 298 K by using a molecular dynamics (MD) simulation. Only one dielectric loss peak was observed in the frequency range and the relaxation in these mixtures can be described by a single relaxation time of the Davidson-Cole. It was observed that within experimental error the dielectric relaxation can be described by the Debye-like model (beta approximately 1, S.M. Puranik, et al. J. Chem. Soc. Faraday Trans.1992, 88, 433 - 435). In general, the results are very consistent with the experimental measurements.
本文通过分子动力学(MD)模拟,在 298K 下研究了介电常数在 1GHz 到 40GHz 范围内不同摩尔比的水-二甲基亚砜(DMSO)混合物的介电特性。在该频率范围内只观察到一个介电损耗峰,这些混合物中的弛豫可以用戴维森-科尔的单一弛豫时间来描述。实验误差范围内,观察到介电弛豫可以用德拜型模型(β约为 1,S.M. Puranik 等人,J. Chem. Soc. Faraday Trans.1992, 88, 433 - 435)来描述。总的来说,结果与实验测量非常吻合。