Oxygen binding and transport in the membrane of poly[[tetrakis(methacrylamidophenyl)porphinato] cobalt-co-hexyl methacrylate]

The copolymer of [α,α′,α″,α$PPRM″-meso-tetrakis (o-methacrylamidophenyl)porphinato]cobalt with hexyl methacrylate (1) gives a transparent and flexible membrane. The covalently introduced (porphinato)cobalt reversibly forms its oxygen adduct in the membrane state. Oxygen-permeation behavior through the membrane is in accordance with a dual-mode transport model. Ratio of D_c to D_D and D_D are diffusion coefficients of oxygen via the fixed (porphinato)cobalt and through polymer matrix) is 10 times larger for the copolymer membrane 1 in comparison with that for the dispersed membrane 2, which indicates effective facilitation in the oxygen transport.