Submitted to: American Chemical Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: August 22, 2002
Publication Date: N/A
Technical Abstract: Ionic liquids (ILs), room temperature liquid organic salts, have gained prominence as alternative media for volatile organic solvents. Recent studies have shown that some enzymes tolerate ILs and have catalytic activities comparable to those obtained in molecular organic solvents. We have investigated the catalytic reactivity of the redox active enzyme cytochrome c and its biomimetic analogs microperoxidase-11 and iron (III) protoporphyrin(IX) (hemin) in ILs. The studies presented herein focus on initial experiments that established the reduction potentials of hemin in two imidazolium-based ILs and the effect of nitrogenous ligands on those potentials. Ligated hemin was studied both as solutions in ILs as well as adsorbed to the electrode surface through disulfide linking groups.