...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Kinetics and solvent-dependent thermodynamics of water capture by a fullerene-based hydrophobic nanocavity
【24h】

Kinetics and solvent-dependent thermodynamics of water capture by a fullerene-based hydrophobic nanocavity

机译：富勒烯基疏水纳米腔捕获水的动力学和溶剂依赖性热力学

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Kinetic and thermodynamic properties of water encapsulation from organic solution by an open-cage [60]fullerene derivative have been investigated. 2D exchange NMR spectroscopy (EXSY) measurements were employed to determine the association and dissociation constants at 300-330 K (ka = 4.3 M -1 × s-1 and kd = 0.42 s-1 at 300 K) in 1,1,2,2-tetrachloroethane-d2 as well as the activation energies (Ea,ass = 27 kJ mol-1, Ea,diss = 50 kJ mol-1). The equilibrium constants and thermodynamic parameters in various solvents (benzene-d6, 1,2-dichlorobenzene-d4, and dimethylsulfoxide-d6) were estimated using 1D-1 H NMR spectroscopy. The parameters were dependent on the polarity of the solvent; ΔH depended linearly on the solvent polarity, becoming increasingly unfavorable as polarity increased. Mixtures of polar dimethylsulfoxide-d 6 in less polar 1,1,2,2-tetrachloroethane-d2 showed a similar trend.
机译：已经研究了开笼[60]富勒烯衍生物从有机溶液中包封水的动力学和热力学性质。使用2D交换NMR光谱（EXSY）测量来确定1,1,2,300-330 K下的缔合和解离常数（300 K下，ka = 4.3 M -1×s-1和kd = 0.42 s-1） ，2-四氯乙烷-d2以及活化能（Ea，ass = 27 kJ mol-1，Ea，diss = 50 kJ mol-1）。使用1D-1 H NMR光谱估算各种溶剂（苯-d6、1,2-二氯苯-d4和二甲基亚砜-d6）中的平衡常数和热力学参数。参数取决于溶剂的极性。 ΔH线性依赖于溶剂的极性，随着极性的增加而变得越来越不利。极性较小的1,1,2,2-四氯乙烷-d2中极性二甲基亚砜-d 6的混合物显示出相似的趋势。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号