Acta Phys. -Chim. Sin. ›› 2009, Vol. 25 ›› Issue (09): 1906-1910.doi: 10.3866/PKU.WHXB20090922

• ARTICLE • Previous Articles     Next Articles

Specific Phenomenon of Effective Permittivity for DMF-H2O Solution

JIA Guo-Zhu, HUANG Ka-Ma, YANG Xiao-Qing, SONG Jian-Ping, YANG Li-Jun   

  1. School of Electronics and Information Engineering, Sichuan University, Chengdu 610065, P. R. China
  • Received:2009-03-31 Revised:2009-06-09 Published:2009-09-03
  • Contact: JIA Guo-Zhu


The permittivities of N,N-dimethylformamide (DMF), water (H2O), and DMF-H2O mixture solution were measured by a resonant cavity perturbation method at 2.45 GHz and 288, 298, and 313 K. The measured results showed a specific phenomenon wherein the imaginary part of the solution's permittivity was larger than that of each of the components. A theoretical calculation indicates that the reason for this phenomenon is high frequency friction increasing in the DMF and H2O mixture. This implies that a new formula needs to be formulated to include hydrogen bond contributions for the explanation of this specific phenomenon.

Key words: Mixture solution, Effective permittivity, Specific phenomenon, Mixture formula, Hydrogen bond


  • O646