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Counterion effects on anion-anion el...

Neuman, Nancy Ildiko.

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Counterion effects on anion-anion electron transfer.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Counterion effects on anion-anion electron transfer./
Author:	Neuman, Nancy Ildiko.
Description:	75 p.
Notes:	Source: Masters Abstracts International, Volume: 44-01, page: 0356.
Contained By:	Masters Abstracts International44-01.
Subject:	Chemistry, Inorganic. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MR05476
ISBN:	9780494054765

Counterion effects on anion-anion electron transfer.
Neuman, Nancy Ildiko.

Counterion effects on anion-anion electron transfer. - 75 p.

Source: Masters Abstracts International, Volume: 44-01, page: 0356.

Thesis (M.Sc.)--University of Calgary (Canada), 2005.

The effects of aqueous supporting electrolytes on the electrode reaction of the CoW12O405-/6- couple and the self-exchange reaction of the AlW12O405-/6- couple were determined. The minor dependence of the CoW12O40 5-/6- half wave potentials on the nature and concentration of the cations, together with the absence of significant cation effects on diffusion coefficients and reaction volumes, indicate that cation-anion pairing is limited in these media. AlW12O405-/6- self-exchange rates were substantially accelerated with increasing cation concentration in the sequence Li+ < Na+ < K+ < Rb+, with parallel decreases in activation enthalpy and entropy in the opposite order. These results indicate specific cation catalysis that is separate from ion-pairing or ionic strength effects. A reaction mechanism in which a partially dehydrated cation facilitates electron transfer by forming a bridge between the reactants is suggested. Studies of the PW 12O403-/4- self-exchange kinetics were precluded by large NMR relaxation times.

ISBN: 9780494054765Subjects--Topical Terms:

517253
Chemistry, Inorganic.

Counterion effects on anion-anion electron transfer.
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020 $a 9780494054765
035 $a (UnM)AAIMR05476
035 $a AAIMR05476
040 $a UnM $c UnM
100 1 $a Neuman, Nancy Ildiko. $3 1916063
245 1 0 $a Counterion effects on anion-anion electron transfer.
300 $a 75 p.
500 $a Source: Masters Abstracts International, Volume: 44-01, page: 0356.
502 $a Thesis (M.Sc.)--University of Calgary (Canada), 2005.
520 $a The effects of aqueous supporting electrolytes on the electrode reaction of the CoW12O405-/6- couple and the self-exchange reaction of the AlW12O405-/6- couple were determined. The minor dependence of the CoW12O40 5-/6- half wave potentials on the nature and concentration of the cations, together with the absence of significant cation effects on diffusion coefficients and reaction volumes, indicate that cation-anion pairing is limited in these media. AlW12O405-/6- self-exchange rates were substantially accelerated with increasing cation concentration in the sequence Li+ < Na+ < K+ < Rb+, with parallel decreases in activation enthalpy and entropy in the opposite order. These results indicate specific cation catalysis that is separate from ion-pairing or ionic strength effects. A reaction mechanism in which a partially dehydrated cation facilitates electron transfer by forming a bridge between the reactants is suggested. Studies of the PW 12O403-/4- self-exchange kinetics were precluded by large NMR relaxation times.
590 $a School code: 0026.
650 4 $a Chemistry, Inorganic. $3 517253
690 $a 0488
710 2 0 $a University of Calgary (Canada). $3 1017619
773 0 $t Masters Abstracts International $g 44-01.
790 $a 0026
791 $a M.Sc.
792 $a 2005
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MR05476