Dielectric relaxation of amides and tetrahydrofuran polar mixture in C$_{6}$H$_{6}$ from conductivity measurement under 9.90 GHz electric field

Pramana

S K SIT²  S SAHOO¹ 

[1] Department of Electronics & Instrumentation Engineering, National Institute of Technology, Silchar 788 010, India$$;Department of Physics, Dr. Meghnad Saha Institute of Technology, P.O. Debhog, Haldia, Dist:-Purba Medinipore 721 657, India$$

关键词: Dielectric relaxation;    dipole moment;    binary mixture;    dimer.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Dielectric relaxation studies of binary ($jk$) polar mixtures of tetrahydrofuran with $N$-methyl acetamide, $N,N$-dimethyl acetamide, $N$-methyl formamide and $N,N$-dimethyl formamide dissolved in benzene(i) for different weight fractions ($w_{jk}$’s) of the polar solutes and mole fractions ($x_{j}$ ’s) of tetrahydrofuran at 25◦C are attempted by measuring the conductivity of the solution under 9.90 GHz electric field using Debye theory. The estimated relaxation time ($au_{jk}$’s) and dipole moment ($mu_{jk}$’s) agree well with the reported values signifying the validity of the proposed methods. Structural and associational aspects are predicted from the plot of $au_{jk}$ and $mu_{jk}$ against $x_{j}$ of tetrahydrofuran to arrive at solute–solute (dimer) molecular association upto $x_{j} = 0.3$ of tetrahydrofuran and thereafter solute–solvent (monomer) molecular association upto $x_{j} = 1.0$ for all systems except tetrahydrofuran + $N,N$-dimethyl acetamide.

【 授权许可】

Unknown