Any of various organic compounds containing four pyrrole rings, occurring universally in protoplasm, and functioning as a metal-binding cofactor in hemoglobin, chlorophyll, and certain enzymes.
[Greek porphurā, purple dye, purple garment; see purple + -in.]
(Biochemistry) any of a group of pigments occurring widely in animal and plant tissues and having a heterocyclic structure formed from four pyrrole rings linked by four methylene groups
[C20: from Greek porphura purple, referring to its colour]
The optical and catalytic properties are based on one hand on porphyrin redox versatility and on the other hand on the redox chemistry of Co(II) that can be converted into a more nucleophilic Co(I) species by single-electron reduction process [19].
This talk presents a personal story of a three-time cancer survivor and how people have tried to fight back against cancer by studying the chemistry and anti-cancer biology of expanded porphyrins. Expanded porphyrin is a term we introduced into the literature in 1988 to describe larger homologues of natural blood pigments, such as the dyes (called heme) that make blood red.
In fact, amine ligants are very stable as axial ligants for most of the complexes that present in the equatorial plane a tetraazamacrocyclic ligand, as the case of porphyrin and chlorinic ligands [23].
The rich self-assembling possibilities of hybrid plasmonic couples due to structural plasticity of porphyrin molecules lead to achieving the required optical properties to be used in plasmonic sensing of vitamins and pharmaceutical compounds [29].
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