Name
Akimova Anna Vladimirovna
Scholastic degree
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Academic rank
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Honorary rank
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Organization, job position
Kuban State University
Web site url
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Articles count: 1
The article discusses results of experimental research
of the influence of aprotic and proton solvents on reaction
rate of water molecules dissociation in the bipolar
membrane MB-1 by the method of electrochemical
impedance frequency spectrum. It was discovered, that
addition of organic component in aqueous solutions results
in significant influence on the parameters of water
dissociation in a bipolar region of the membrane.
The reason for this influence is the reduction of the
mass fraction of water in solution and, consequently,
in a bipolar region of the membrane, which itself reduces
the rate of the dissociation reaction. Another
reason for the influence of the organic solvent is its effect
on the network of hydrogen bonds existing in water
and aqueous solutions. Depending on the nature of
organic solvent and its concentration, the network of
hydrogen bonds may be strengthened, or destroyed,
thus facilitating removal of the proton involved in the
reactions between water molecules and catalytic centers
in cation-exchange and anion-exchange layer of
bipolar membrane, or retarding removal of proton.
This leads respectively to speed up or slow down the
rate of dissociation in the bipolar region of the membrane,
as well as changing the constants of the dissociation
reaction of water. Introduction of organic solvent
in solutions, which are in the contact with bipolar
membrane, is a convenient method of investigating the
role of solution composition on the rate of proton
transfer between water molecules and catalytic centers
in the membranes