物理化学学报2011，Vol.27Issue(11)：2499-2504,6.
离子对液态水缔合构造影响的能量表征
Energy Characterization of Effect for lons on the Structure of Water
摘要
Abstract
At a concentration of 0-1.0 mol ? L~1 the effect of salts (KCI, MgCI2, and CaCI2) on the structure of water was studied from the viewpoint of energy change using differential scanning calorimetry (DSC) and the results were compared with that obtained by the analysis of the chemical shift obtained by "O-NMR (5(1?OH2)). A linear increase in the 5(17OH2) of water and a linear decrease in the apparent activation energy (-BIR) of water with an increase in the concentration of salt was obtained. In addition, the rate of change of 5('7OH2) and -E'lR increased as follows: KCI<MgCI2<CaCI2. Based on a two-state model, we demonstrate that the change in 5(17OH2) of water (L5) is proportional to the change in molar energy of water (A￡). These results indicate that KCI, MgCI2, and CaCI2 promote the formation of the water cluster structure and the energy change of water is equivalent to the chemical shift obtained by "O-NMR for the characterization of the water cluster structure.关键词
盐类/水/缔合构造/氢键/能量表征Key words
Salt/ Water/ Cluster structure/ Hydrogen bond/ Energy characterization分类
化学化工引用本文复制引用
和劲松,杨宏伟,甘晓玲,蔡然,朱松明,于勇,李建平,木泰华,祝万鹏..离子对液态水缔合构造影响的能量表征[J].物理化学学报,2011,27(11):2499-2504,6.基金项目
浙江省重点科技创新团队(2009R50001)与浙江省教育厅(Y201018520)资助项目 （2009R50001）
