化学学报 ›› 2004, Vol. 62 ›› Issue (10): 998-1002. 上一篇    下一篇

研究简报

异丙醇-水体系中分子间相互作用对萘迁移热力学性质的影响

周保学1,2, 蔡伟民1,2, 何争光1, 蔡俊1, 邹立壮3   

  1. 1. 上海交通大学环境科学与工程学院, 上海, 200240;
    2. 哈尔滨工业大学, 哈尔滨, 150001;
    3. 中国矿业大学, 北京, 化学与环境工程学院, 北京, 100083
  • 投稿日期:2003-09-15 修回日期:2004-01-10 发布日期:2014-02-17
  • 通讯作者: 蔡伟民,E-mail:wmcai@sjtu.edu.cn E-mail:wmcai@sjtu.edu.cn
  • 基金资助:
    中国博士后科学基金(中博基[2002]11号)资助项目.

Effect of Intermolecular Interactions on the Thermodynamic Properties of Transfer of Naphthalene in Water-Isopropyl Alcohol Solutions

ZHOU Bao-Xue1,2, CAI Wei-Min1,2, HE Zheng-Guang1, CAI Jun1, ZOU Li-Zhuang3   

  1. 1. Shool of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240;
    2. Harbin Institute of Technology, Harbin 150001;
    3. School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083
  • Received:2003-09-15 Revised:2004-01-10 Published:2014-02-17

研究了萘从水到H2O-异丙醇(IPA)混合溶剂中的迁移变化,表明萘的迁移随异丙醇摩尔分数x(IPA)的增加呈复杂的下降趋势.标准迁移熵和标准迁移焓的研究表明,随异丙醇摩尔分数x(IPA)的增加,二者呈现双峰变化.迁移熵和迁移焓的双峰变化,表明系列H2O-IPA混合溶剂的微观结构经历了从相对的有序到无序到再有序、再无序、再有序的变化过程,H2O-IPA混合溶剂中除了在富水区存在着笼合物的特殊结构外,在x(IPA)约为0.08处还存在着一相对有序的结构.研究表明,H2O-异丙醇(IPA)混合溶剂组成、结构变化均对萘的迁移产生着明显的影响.

关键词: 萘, 异丙醇, 迁移热力学函数, 分子间相互作用

Standard thermodynamic functions of transfer of naphthalene from water to H2O-isopropyl alcohol (IPA) mixtures have been determined. Standard free energies of transfer for naphthalene showed a complex decreasing tendency with the increasing of x(IPA), and the standard entropy and enthalpy of transfer exhibited a change of double peak curves with x (IPA). This illustrated that the microcosmic structures of a series of mixed solvents of H2O-IPA underwent a variable process from relative order to relative disorder and then from relative disorder to relative order, and back to relative disorder again, then up to relative order. The results show that there is a relatively ordered structure near x (IPA)=0.08 in H2O-IPA solutions besides the existence of a clathrate structure in the water-rich region.

Key words: naphthalene, isopropyl alcohol, thermodynamic function of transfer, intermolecular interaction