Semiconductor Electrodes: XLVII . A‐C Impedance Technique for Evaluating Surface State Properties of in Acetonitrile Solutions Containing Various Redox Couples

1983 ◽  
Vol 130 (2) ◽  
pp. 385-391 ◽  
Author(s):  
G. Nagasubramanian ◽  
Bob L. Wheeler ◽  
G. A. Hope ◽  
Allen J. Bard
Keyword(s):  
Surface State ◽  
Redox Couples ◽  
Impedance Technique ◽  
Acetonitrile Solutions ◽  
Semiconductor Electrodes

Semiconductor Electrodes: XXXVII . Photoelectrochemical Behavior of p‐Type in Acetonitrile Solutions

1981 ◽  
Vol 128 (10) ◽  
pp. 2158-2164 ◽  
Author(s):  
G. Nagasubramanian ◽  
Alberto S. Gioda ◽  
Allen J. Bard
Keyword(s):  
Acetonitrile Solutions ◽  
Semiconductor Electrodes ◽  
P Type

Spectroelectrochemical behaviour of the trinuclear [Ru3O(O2CCH3)6(isonicotinamide)3] cluster

1989 ◽  
Vol 67 (10) ◽  
pp. 1632-1635 ◽  
Author(s):  
Henrique E. Toma ◽  
Carlos J. Cunha
Keyword(s):  
Oxidation States ◽  
Metal Charge ◽  
Trinuclear Cluster ◽  
Oxygen Ion ◽  
Redox Couples ◽  
Metal Metal ◽  
Charge Transfer Transitions ◽  
Central Oxygen ◽  
Acetonitrile Solutions ◽  
Metal Charge Transfer

The [Ru3O(OOCCH3)6(isonicotinamide)3] cluster exhibits reversible electrochemical and spectroelectrochemical behaviour in acetonitrile solutions, associated with a series of successive μ-oxo RuIVRuIVRuIII/RuIVRu1IIRuIII/…/RuIIRuIIRuII redox couples with E0 = 2.16, 1.21, 0.19, −0.98, and −1.4 V versus SHE. The metal-isonicotinamide and metal–metal charge–transfer transitions shift to lower energies as the oxidation states of the ruthenium ions decrease. In alkaline aqueous solution, the μ-oxo RuIIIRuIIIRuII cluster can be reversibly reduced to the μ-oxo RuIIIRuIIRuII product (E0 = −0.85 V); however, below pH 4, the reduction proceeds according to two successive steps, yielding RIIIRIIRuII species with loss of the central oxygen ion. These species can be reoxidized in the reverse potential scan, regenerating the µ-oxo RuIIIRuIIIRuII complex. Keywords: ruthenium–acetate clusters, cluster spectroelectrochemistry, cluster electrochemistry, ruthenium–isonicotinamide complex, trinuclear cluster.

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