scholarly journals Solute−Solvent Complex Switching Dynamics of Chloroform between Acetone and Dimethylsulfoxide−Two-Dimensional IR Chemical Exchange Spectroscopy

2008 ◽  
Vol 112 (44) ◽  
pp. 13906-13915 ◽  
Author(s):  
Kyungwon Kwak ◽  
Daniel E. Rosenfeld ◽  
Jean K. Chung ◽  
Michael D. Fayer
Keyword(s):  
Chemical Exchange ◽  
Two Dimensional ◽  
Switching Dynamics ◽  
Exchange Spectroscopy ◽  
Solvent Complex

scholarly journals Surface, size and topological effects for some nematic equilibria on rectangular domains

2020 ◽  
Vol 25 (5) ◽  
pp. 1101-1123 ◽  
Author(s):  
Lidong Fang ◽  
Apala Majumdar ◽  
Lei Zhang
Keyword(s):  
Aspect Ratio ◽  
Point Defects ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Bifurcation Diagrams ◽  
Variable Formula ◽  
Limiting Profile ◽  
Switching Dynamics ◽  
Line Defects ◽  
Carry Over

We study nematic equilibria on rectangular domains, in a reduced two-dimensional Landau–de Gennes framework. These reduced equilibria carry over to the three-dimensional framework at a special temperature. There is one essential model variable, [Formula: see text], which is a geometry-dependent and material-dependent variable. We compute the limiting profiles exactly in two distinguished limits: the [Formula: see text] 0 limit relevant for macroscopic domains and the [Formula: see text] limit relevant for nanoscale domains. The limiting profile has line defects near the shorter edges in the [Formula: see text] limit, whereas we observe fractional point defects in the [Formula: see text] 0 limit. The analytical studies are complemented by some bifurcation diagrams for these reduced equilibria as a function of [Formula: see text] and the rectangular aspect ratio. We also introduce the concept of ‘non-trivial’ topologies and study the relaxation of non-trivial topologies to trivial topologies mediated via point and line defects, with potential consequences for non-equilibrium phenomena and switching dynamics.

Application of two-dimensional NMR to kinetics of chemical exchange

1990 ◽  
Vol 90 (6) ◽  
pp. 935-967 ◽  
Author(s):  
Charles L. Perrin ◽  
Tammy J. Dwyer
Keyword(s):  
Chemical Exchange ◽  
Two Dimensional ◽  
Kinetics Of

scholarly journals Cross‐Peaks in Simple Two‐Dimensional NMR Experiments from Chemical Exchange of Transverse Magnetisation

2019 ◽  
Vol 131 (26) ◽  
pp. 8876-8880
Author(s):  
Christopher A. Waudby ◽  
Tom Frenkiel ◽  
John Christodoulou
Keyword(s):  
Chemical Exchange ◽  
Two Dimensional ◽  
Transverse Magnetisation
Sign in / Sign up

Export Citation Format

Share Document