One- and two-electron reduction of metalloporphyrins. Radiation chemical, photochemical, and electrochemical studies. Kinetics of the decay of .pi.-radical anions

1986 ◽  
Vol 90 (11) ◽  
pp. 2462-2468 ◽  
Author(s):  
M. C. Richoux ◽  
P. Neta ◽  
Anthony Harriman ◽  
S. Baral ◽  
P. Hambright
Keyword(s):  
Radical Anions ◽  
Electrochemical Studies ◽  
Radiation Chemical ◽  
Electron Reduction ◽  
Kinetics Of

Organophosphazenes. 25. The synthesis and electrochemistry of the dicobalt hexacarbonyl complexes of phenylethynylcyclophosphazenes

2002 ◽  
Vol 80 (11) ◽  
pp. 1393-1397 ◽  
Author(s):  
Maneesh Bahadur ◽  
Christopher W Allen ◽  
William E Geiger ◽  
Adam Bridges
Keyword(s):  
Spin Density ◽  
Nmr Spectra ◽  
Esr Spectra ◽  
Radical Anions ◽  
Electrochemical Studies ◽  
Unpaired Spin Density ◽  
Unpaired Spin ◽  
Electron Reduction ◽  
Dicobalt Hexacarbonyl

The syntheses of the dicobalt hexacarbonyl complexes, N3P3F6-n(C[Formula: see text]CPhCo2(CO)6)n (n = 1 (3), n = 2 (4)), is reported. The introduction of the organometallic fragment allows for simplification of the NMR spectra and separation of the isomers of the disubstituted (4) derivatives. Electrochemical studies show that 3 undergoes a reversible one-electron reduction. At 233 K, the geminal isomer of 4 undergoes two separate reversible one-electron reductions. The ESR spectra of the radical anions of 3 and 4 have been obtained and show the absence of delocalization of unpaired spin density from the organometallic cluster to the phosphazene.Key words: cyclophosphazenes, cobalt–alkyne clusters, electrochemistry, ESR.

One-electron reduction of tris(2,2'-bipyrimidine)ruthenium(2+) ion in aqueous solution: a photochemical, radiation chemical, and electrochemical study

1989 ◽  
Vol 93 (16) ◽  
pp. 6080-6088 ◽  
Author(s):  
Gilda Neshvad ◽  
Morton Z. Hoffman ◽  
Quinto G. Mulazzani ◽  
Margherita Venturi ◽  
Mauro Ciano ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Electrochemical Study ◽  
Radiation Chemical ◽  
Electron Reduction

The kinetics of the electrodeposition of cadmium telluride

1984 ◽  
Vol 37 (4) ◽  
pp. 689 ◽  
Author(s):  
WJ Danaher ◽  
LE Lyons
Keyword(s):  
Aqueous Solution ◽  
Cadmium Telluride ◽  
Second Step ◽  
Disc Electrode ◽  
Electron Reduction ◽  
Kinetics Of ◽  
Rotating Ring Disc Electrode

The kinetics of the electrodeposition of CdTe from an aqueous solution containing CdSO4, TeO2 and H2SO4 were investigated by using a rotating ring-disc electrode. The results for tellurium deposition alone indicated that the reaction occurs through a six-electron reduction of HTeO2+ to H2Te, followed by a reaction between H,2Te and HTeO2+ yielding tellurium. At HTeO2+ concentrations greater than 10-3 M, the second step of this process is very fast and the overall reaction behaves as a four-electron reduction of HTeO2+ to Te: only at lower HTeO2+ concentrations was evidence observed for the six-electron reduction. The electrodeposition of CdTe occurs through two possible pathways: Cd2+ ions can react with H2Te produced during the reduction of HTeO2+ and thus yield CdTe, or tellurium deposited on the electrode can react with Cd2+ to yield CdTe. The two reactions compete with the deposition of pure tellurium. Conditions to deposit stoichiometric CdTe are suggested.

Sign in / Sign up

Export Citation Format

Share Document