Low-frequency dielectric constant of methylamine, n-propylamine, and isopropylamine

Abstract

The rapidly deteriorating precision at the highest temperatures is attributable mostly to those density tubes which contained the least AICI3. That this is so was demonstrated by using Equation 1to calculate V¿ at various temperatures, using Ti and m¡ from Table I and D and d from Equation 5. Appropriate corrections for thermal expansion were made. This procedure reproduced the 11 liquid volumes in Table II at 197°C with a ±0.2% average deviation, the nine volumes from 197-337°C with a ±0.7% average deviation, and the eight volumes over the temperature range 197-345°C with an average deviation of ±2.6%. The maximum expected error arising from the uncertainties in the calibration data and cathetometer readings was about ±0.5% to ±1.0%. At the higher temperature it was evident that the tubes with the least Aids, and most especially tubes IV and V, were the sources of most of the uncertainty. On the other hand, the liquid volume in tube III, whose overall density of A1C13 was very nearly the critical density, could be calculated to within ±1.5% of the observed value at temperatures as high as 355°C.

Gold Nanoparticle Monolayers with Tunable Optical and Electrical Properties

“…λ A represents the SPR maximum for zero interparticle gap. By the same analysis, the value of λ A at d = 0 corresponds to an effective dielectric constant around the nanoparticles (ε m = 11.54) that is of a similar order of magnitude to that of methylamine …”

Transferable Force Field for Equilibrium and Transport Properties in Linear, Branched, and Bifunctional Amines I. Primary Amines

“…The obtained results were compared with the numerical values available in the Computational Chemistry and Benchmarks Database of NIST, finding excellent agreement with our values. The dipoles in the liquid phase were calculated using Jaguar’s solvation model (Poisson–Boltzmann solver, PB) which fits the field produced by the solvent dielectric continuum to a set of point charges using experimental information − such as the dielectric constant, density, and molecular weight. Figure shows the behavior of the dipole moment as a function of the number of carbons for the first six linear amines of the homologous series; triangles represent the dipole in the gas phase, circles are those in the liquid phase, and the dashed line represents the dipole moment using the TraPPE-EH charges for the most stable conformation.…”

Structure and properties of self-assembled fluorocarbon–silica nanocomposites

“…Changes in the order of these calculations did not produce significant differences in the obtained results. Dielectric constants of each component were taken from literature: e 0 r ¼ 5:1 for aminopropane [32] and e 0 r ¼ 4:5 for SiO 2 [33]. For perfluoroctane sulfonic acid the dielectric constant was approximated by the value commonly used for polytetrafluoroethylene (e 0 r ¼ 2).…”