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Functional Capsule Membranes. Part 28. A Capsule Membrane grafted with Viologen-containing Polymers as a Reactor of Electron-transfer Catalysis in Heterophases

DOI: 10.1039/P29870001003

Source and publish data:

Journal of the Chemical Society. Perkin transactions II p. 1003 - 1008 (1987)

Update date:2022-08-29

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Authors:

Okahata, YoshioOkahata, Yoshio

Ariga, KatsuhikoAriga, Katsuhiko

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Article abstract of DOI:10.1039/P29870001003

Large, ultrathin nylon capsule membranes surface-grafted with viologen-containing polymers nV2+); n=3,6, and 10> were prepared.The viologen polymers acted as an effective electron-transfer catalyst in heterophases: the debromination of meso-1,2-dibromo-1,2-diphenylethane and the reduction of azobenzene in the inner organic solution of the capsule with excess of sodium dithionite in the outer aqueous solution was largely accelerated by the poly(CnV2=) polymers grafted on the capsule membrane.The reaction rates increased with increasing spacer chain length (Cn) of the grafted poly(CnV2+).The efficiency of electron transfer catalysis was also influenced by the graft amount of poly(CnV2+) on the capsule surface and by the ionic strength of the outer aqueous phase.

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