Kinetic isotope effect and extended pH-dependent studies of the oxidation of hydroxylamine by hexachloroiridate (IV): ET and PCET

Article Abstract:

A spectrophotometric analysis of the oxidation of hydroxylamine by [(Ir[Cl.sub.6]).sup.2-] in deoxygenated aqueous solutions in the range of pH4 tp 9 at 25 degree centigrade is described to test the electron-transfer (ET) and proton-coupled electron transfer (PCET) mechanism. A mechanism is suggested in which rate constant ([k.sub.1]) relates to concerted PCET and rate constant (k') corresponds to ET from N[H.sub.2][O.sup.-] and the large KIE for k' is attributed to the equilibrium isotope effect for p[K.sub.a] of N[H.sub.2]OH.

Electron transport, Hydrogen-ion concentration, pH

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Adsorption kinetics of NIPAM-based polymers at the air-water interface as studied by pendant drop and bubble tensiometry

Article Abstract:

An investigation on the adsorption of N-isopropylacrylamide (NIPAM) based thermoresponsive polymers at the air-water interface is conducted by using drop and bubble shape tensiometry. It was found that the rate of polymer adsorption increased as the molecular weight of the polymer decreased.

Adsorption

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Photoresponsive change of oxygen-binding affinity of a cobalt Schiff-base complex with an axially coordinating stilbazole residue of a copolymer

Article Abstract:

The investigation of the reversible binding reaction of oxygen to N,N'-ethylene bis(salicylideneiminato) cobalt(II) (CoS) which is coordinated by a photoisomerizable stilbazole residue of copolymer is reported.

Oxides, Block copolymers, Chemical properties

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