Snowballing effect for electron solvation in dilute solutions of polar molecules in nonpolar solvents

1978 ◽  
Vol 69 (2) ◽  
pp. 748-750 ◽  
Author(s):  
M. Tachiya
Keyword(s):  
Polar Molecules ◽  
Dilute Solutions ◽  
Electron Solvation ◽  
Nonpolar Solvents

Relaxation processes of some simple aliphatic molecules in dilute solutions

1977 ◽  
Vol 55 (4) ◽  
pp. 297-301 ◽  
Author(s):  
M. P. Madan
Keyword(s):  
Carbon Tetrachloride ◽  
Dielectric Relaxation ◽  
Thermodynamic Parameters ◽  
Relaxation Times ◽  
Relaxation Processes ◽  
Dilute Solutions ◽  
Microwave Region ◽  
Nonpolar Solvents ◽  
Dielectric Data ◽  
Intramolecular Rotation

The dielectric relaxation processes of acetone, cyclohexanone, 4-methyl-2-pentanone, and 4-heptanone in dilute nonpolar solvents, n-heptane, cyclohexane, benzene, and carbon tetrachloride have been studied in the microwave region over a temperature range 10 to 60 °C. The relaxation times and the thermodynamic parameters for the activated states have been determined using the measured dielectric data. The results have been discussed in terms of dipole reorientation by molecular and intramolecular rotation and compared, wherever possible, with other similar studies on aliphatic molecules.

Dielektrisdie Verluste starrer polarer Molekule in verdiinnter Losung bei Mikrowellen und im Fernen Infrarot

1981 ◽  
Vol 36 (6) ◽  
pp. 611-621
Author(s):  
R. Deiker ◽  
G. Klages
Keyword(s):  
Dielectric Loss ◽  
Absorption Coefficient ◽  
Experimental Error ◽  
Low Frequency ◽  
Polar Molecules ◽  
Dilute Solutions ◽  
Absorption Data

Abstract With regard to their Debye and Poley absorption the dielectric loss of twelve species of rigid polar molecules has been measured in very dilute solutions (n-heptane cyclohexane and decalin) at frequencies from 300 MHz to 5 THz. Within the limits of experimental error for t-butylchloride no Poley absorption is observed. Its ε" (ω) plot may be fitted using the three-variable Mori formalism because e" finally decreases with the fifth power of frequency. The absorption data of all other dipole molecules cannot be fitted by a single Mori curve. Therefore we propose to separate the Debye absorption approximating the low frequency wing and the predominant loss region as done with t-butylchloride. In this way the dispersion step of the Poley absorption itself is obtained, and it is discussed according to the libration model. The observed step is too large in benzophenone only perhaps due to the fast orientation of a mesomeric moment by a ring twist. The Poley ε" (ω) data are formally matched by one or two three-variable Mori curves, and the frequency behaviour of the dipole ensemble is discussed in terms of librations damped by soft collisions, using the absorption coefficient α (ω)

Sign in / Sign up

Export Citation Format

Share Document