Dual-mode transport of molecular oxygen in a membrane containing a cobalt porphyrin complex as a fixed carrier

Hiroyuki Nishide, Manshi Ohyanagi, Osamu Okada, Eishura Tsuchida

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Abstract

Molecular oxygen transport through a polymeric membrane is found to be augmented by the addition of [α,α′,α″,α‴-meso-tetrakisis-(o- pivalamidophenyl)porphinato]cobalt[II]-1-methylimidazole (CoPIm) complex, which forms an oxygen adduct rapidly and reversibly. The oxygen-binding rate and equilibrium constants for the Co complex in the membrane, i.e., a fixed carrier, were measured spectroscopically in situ. The oxygen permeability of the membrane containing CoPIm increased with decreasing upstream oxygen pressure, which is in accordance with a dual-mode transport model. The oxygen-binding parameters determined spectroscopically, were_adequate for an approximate analysis in terms of this model. The permeability ratio (PO2/PN2) was greater than 10 in the membrane containing a large amount of CoPIm.

Original languageEnglish
Pages (from-to)417-422
Number of pages6
JournalMacromolecules
Volume20
Issue number2
Publication statusPublished - 1987

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Molecular oxygen
Porphyrins
Cobalt
Oxygen
Membranes
Polymeric membranes
Equilibrium constants
Rate constants

ASJC Scopus subject areas

  • Materials Chemistry

Cite this

Dual-mode transport of molecular oxygen in a membrane containing a cobalt porphyrin complex as a fixed carrier. / Nishide, Hiroyuki; Ohyanagi, Manshi; Okada, Osamu; Tsuchida, Eishura.

In: Macromolecules, Vol. 20, No. 2, 1987, p. 417-422.

Research output: Contribution to journalArticle

Nishide, Hiroyuki ; Ohyanagi, Manshi ; Okada, Osamu ; Tsuchida, Eishura. / Dual-mode transport of molecular oxygen in a membrane containing a cobalt porphyrin complex as a fixed carrier. In: Macromolecules. 1987 ; Vol. 20, No. 2. pp. 417-422.
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