New derivatives of (meso-α,α,α,α-tetrakis(O-pivalamidophenyl)por phinato) cobalt (CoPs) were characterized by oxygen-binding equilibrium and rate constants of the cobalt centered in the porphyrins. They depended on the structure of the porphyrin; for example, the rate constants of oxygen binding and dissociation (kon and koff) for α3β-CoP4P (Chart 1) were 3 and 20 times as large as those for α4-CoB4P, respectively. Oxygen transport through the polymer membranes containing CoPs as the fixed oxygen carriers was facilitated and was affected by the oxygen-binding character or the structure of CoPs. The logarithmically linear correlation of the oxygen-dissociation rate constant of CoPs (koff = (3-66) × 103 S-1) with the diffusion constant of oxygen via CoPs fixed in the membranes (Dcc = (3-140) × 10-9 cm2 S-1) was given for those six CoP derivatives.
|Number of pages||5|
|Journal||Journal of Physical Chemistry|
|Publication status||Published - 1994|
ASJC Scopus subject areas
- Physical and Theoretical Chemistry