Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Susan C. Tucker"'
Publikováno v:
The Journal of Supercritical Fluids. 24:173-181
A compressible continuum model for supercritical fluoroform is used to model enantiomeric selectivities measured experimentally by Jessop et al. While oversimplified models, which exaggerate the importance of the electrostriction effect, do produce a
Autor:
Ryoji Noyori, Richard A. Brown, Philip G. Jessop, Jianliang Xiao, Takao Ikariya, Susan C. Tucker, Masashi Yamakawa, Masato Kitamura
Publikováno v:
The Journal of Supercritical Fluids. 24:161-172
Amino alcohol-catalyzed asymmetric alkylation of benzaldehydes by dialkylzincs can be achieved in supercritical fluoroform (scCHF 3 ) and supercritical ethane (scC 2 H 6 ) with high conversion and enantioselectivity. The higher enantioselectivity in
Autor:
Susan C. Tucker, Alexander N. Drozdov
Publikováno v:
The Journal of Chemical Physics. 115:9675-9684
We present an improved method for numerical evaluation of the least nonvanishing eigenvalue in dissipative systems. It is based on a modified version of the reactive flux formula for the rate which eliminates the principal shortcomings of the origina
Autor:
Alexander N. Drozdov, Susan C. Tucker
Publikováno v:
The Journal of Physical Chemistry B. 105:6675-6683
An extension of the generalized Langevin equation (GLE) is introduced in order to model diffusion processes in near-critical fluids. Unlike the standard GLE, this new approach allows a flexible des...
Autor:
Susan C. Tucker, Alexander N. Drozdov
Publikováno v:
The Journal of Chemical Physics. 114:4912-4917
While detailed descriptions of critical anomalies are well known for thermodynamic variables, the effect of critical fluctuations on microscopic properties is much less well understood. Herein we use the results of molecular dynamics simulation, for
Autor:
Susan C. Tucker, Alexander N. Drozdov
Publikováno v:
The Journal of Chemical Physics. 113:258-265
We propose a Rayleigh-quotient-based perturbation method for estimating the least nonvanishing eigenvalue of the Fokker–Planck equation in the spatial diffusion regime. Comparison of the resulting expression against exact numerical rates in a symme
Publikováno v:
The Journal of Chemical Physics. 112:10327-10339
We derive a family of local-density-specific radial distribution functions which enable us to analyze the fluid structure around a tagged solvent particle as a function of the local environment about that particle. With this new structural measure, w
Publikováno v:
The Journal of Physical Chemistry B. 104:6248-6257
We used molecular dynamics simulation of a neat two-dimensional Lennard-Jones fluid to examine how the distribution of local densities found around an atom varies as the critical point is approached. Through this analysis, we discovered that mean loc
Publikováno v:
The Journal of Physical Chemistry B. 104:6266-6270
Through molecular dynamics simulation we demonstrate that the time scale for local solvent reorganizations, which may control solute dynamics, can become very long for low- and near-critical-density supercritical fluids. We show that this can be ascr
Publikováno v:
The Journal of Physical Chemistry B. 104:6258-6265
Evaluation of local-density-specific radial distribution functions in a two-dimensional supercritical Lennard-Jones fluid has enabled us to elucidate how the correlations between a solvent particle...