2006
DOI: 10.1016/j.chemphys.2005.11.035
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Non-innocent electrolyte effects on bimolecular pseudo-self-exchange reactions of ruthenium ammine complexes: Evidence for electron-transfer catalysis in H-bonded ternary assemblies

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Cited by 2 publications
(4 citation statements)
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“…If present, an interaction between the seven-coordinate iron complex in both its oxidation states (Fe III and Fe II ) and the ions in its substrate binding sites would result in a shift of the [Fe(dapsox)(CH 3 CN) 2 ] 0/+ couple redox potential upon increase of the salt concentration . For the electrochemical guest binding titrations, the equilibria can be represented by a redox square (Scheme ), and the interaction can be quantified by determining the apparent guest binding constant according to eq 1, 6a,, where Δ E is a shift in the host redox potential as a function of guest concentration and K II and K III correspond to the 1:1 host/guest complex in the divalent and trivalent forms of the receptor, respectively
2
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Section: Resultsmentioning
confidence: 99%
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“…If present, an interaction between the seven-coordinate iron complex in both its oxidation states (Fe III and Fe II ) and the ions in its substrate binding sites would result in a shift of the [Fe(dapsox)(CH 3 CN) 2 ] 0/+ couple redox potential upon increase of the salt concentration . For the electrochemical guest binding titrations, the equilibria can be represented by a redox square (Scheme ), and the interaction can be quantified by determining the apparent guest binding constant according to eq 1, 6a,, where Δ E is a shift in the host redox potential as a function of guest concentration and K II and K III correspond to the 1:1 host/guest complex in the divalent and trivalent forms of the receptor, respectively
2
…”
Section: Resultsmentioning
confidence: 99%
“…Different from the electrochemical measurements, where the effects of host−guest interactions on the redox active iron center can be observed, 7 Li NMR titrations can demonstrate the complexation effect on the Li + cation itself. The NMR chemical shift titration has been widely used as a method for the determination of binding constants. 6a, The easily observed and sensitive 7 Li isotope has nuclear spin I = 3/2 and high abundance (95%), making it an attractive nucleus for NMR titrations . In the case of host−guest complexation reactions, either the concentration of guest ( 7 Li nucleus) or of the host is varied and the resulting change in the chemical shift is followed.…”
Section: Resultsmentioning
confidence: 99%
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“…18 The presence of non-innocent electrolytes (mucuonate and terephthalate) in studies of pseudo-self-exchange rates for [Ru(NH 3 ) 5 (py)] 2+ /[Ru(NH 3 ) 5 (fpy)] 2+ cause rate accelerations, explained by superexchange reactions in hydrogen-bonded association complexes, allowing electron transfer over distance in aqueous solution. 19 A detailed study of the effect of Cu 2+ on the promotion of the Fenton reaction 20 postulates the formation of the binuclear species [Fe-O-Cu] 4+ , which is more efficient in producing oxygen than any other intermediates formed in the reaction. Reaction of H 2 O 2 with a non-heme iron(II) complex bearing a pentadentate bispidene ligand in water has been shown to produce a stable Fe IV QO complex.…”
Section: Redox Reactionsmentioning
confidence: 99%