AI Article Synopsis
- A range of lariat ethers were used to dissolve water-soluble cytochrome c in methanol, featuring various functional groups attached to crown ether rings.
- The alcohol-armed 18-crown-6 derivative showed the best solubility for cytochrome c through a process called supramolecular complexation.
- The cytochrome c-lariat ether complexes were thoroughly analyzed, revealing effective catalysis of pinacyanol chloride oxidation, outperforming unmodified cytochrome c in the process.
Article Abstract
A variety of lariat ethers were employed to solubilize water-soluble cytochrome c in methanol, in which alcohol, ether, ester, amine, and amide functionalities were attached as cation-ligating side arms to 18-crown-6, 15-crown-5, and 12-crown-4 rings. Among these lariat ethers, the alcohol-armed 18-crown-6 derivative offered the highest solubilization efficiency for cytochrome c via supramolecular complexation. The resulting cytochrome c-lariat ether complexes were electrochemically and spectroscopically characterized and confirmed to have redox-active heme structures of 6-coordinate low-spin population in methanol. Some of them catalyzed the oxidation of pinacyanol chloride with hydrogen peroxide in methanol and exhibited higher activities than unmodified cytochrome c and its poly(ethylene glycolated) derivative. Since the supramolecular complexation between lariat ether and cytochrome c includes extremely simple procedures, it provides a facile preparation method of effective biocatalysts working in organic solvents from metalloproteins.
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| http://dx.doi.org/10.1021/ic991286f | DOI Listing |
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