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The book discusses the methodology and experimental
setup of Ultrafst Chemical Exchange Spectroscopy in
details. Some application examples of the
new method are also included. The method has been
successfully applied to the study of fast chemical
exchange phenomena in liquid solutions at room
temperature. The formation and dissociation dynamics
of weak intermolecular interactions were monitored
in real time with the method. For interaction
enthalpies from -0.6 kcal/mol to -3.3 kcal/mol, the
dissociation time constants vary from 3 ps to 140
ps. The dissociation rates of the interactions are
strongly correlated with their enthalpies. The
correlation can be described with an equation
similar to the Arrhenius equation. As another
example of chemical exchange spectroscopy, the rate
of carbon-carbon single bond rotational
isomerization of an ethane derivative in a room
temperature liquid solution is measured. Basedon
the experimental results and density functional
theory calculations, the time constant for the
ethane internal rotational isomerization under the
same conditions is estimated to be ~12 ps.
setup of Ultrafst Chemical Exchange Spectroscopy in
details. Some application examples of the
new method are also included. The method has been
successfully applied to the study of fast chemical
exchange phenomena in liquid solutions at room
temperature. The formation and dissociation dynamics
of weak intermolecular interactions were monitored
in real time with the method. For interaction
enthalpies from -0.6 kcal/mol to -3.3 kcal/mol, the
dissociation time constants vary from 3 ps to 140
ps. The dissociation rates of the interactions are
strongly correlated with their enthalpies. The
correlation can be described with an equation
similar to the Arrhenius equation. As another
example of chemical exchange spectroscopy, the rate
of carbon-carbon single bond rotational
isomerization of an ethane derivative in a room
temperature liquid solution is measured. Basedon
the experimental results and density functional
theory calculations, the time constant for the
ethane internal rotational isomerization under the
same conditions is estimated to be ~12 ps.