College of Physics and Electronics Engineering, Sichuan Normal University , Chengdu 610066, China.
J Phys Chem A. 2013 Dec 5;117(48):12983-9. doi: 10.1021/jp4082245. Epub 2013 Nov 22.
Dielectric spectrum of polyhydric alcohol (1,2,3)-DMSO (dimethyl sulfoxide) mixtures, at full concentration, have been determined by the dielectric relaxation spectroscopy (DRS) method at frequencies from 20 MHz to 20 GHz at room temperature. The mixture behavior is described according to four Davidson-Cole terms whose evolution with composition is analyzed. The binding energies and hydrogen bond (HB) numbers between solute-solute and solvent-solute pairs are obtained from the permittivity using the Luzar model. The average HBs number associated with DMSO decreases with increasing mole fraction of DMSO. The binding energy of solute-solute (E11) and solvent-solute (E12) interaction decreases with the increased numbers of carbon atoms in the alcohols.
多羟基醇（1,2,3）-DMSO（二甲亚砜）混合物在全浓度下的介电谱已通过介电弛豫光谱（DRS）方法在室温下从 20 MHz 至 20 GHz 的频率下确定。混合物的行为根据四个 Davidson-Cole 项进行描述，其组成变化进行了分析。使用 Luzar 模型从介电常数获得溶质-溶质和溶剂-溶质对之间的结合能和氢键（HB）数。与 DMSO 相关的平均 HB 数随 DMSO 摩尔分数的增加而减小。溶质-溶质（E11）和溶剂-溶质（E12）相互作用的结合能随醇中碳原子数的增加而降低。
