ArticleChemical science2026
Enhanced and selective oxygen reduction by iron porphyrin with a biguanide residue in the second coordination sphere.
Article in Chemical science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The role of 2nd sphere residues in catalytic processes that require multiple protons and multiple electrons is a growing area of interest. These 2nd sphere effects manifest through hydrogen bonding, proton transfer, and electrostatic interactions, resulting in very selective catalysis. Here, a biguanide functional group, which can form very strong hydrogen bonding with several water molecules, is installed in the 2nd sphere of an iron porphyrin. The resulting porphyrin, Fe-biguanide, selectively reduces O
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