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单词 Benzoporphyrin
释义

Benzoporphyrin

英语百科

Porphyrin

Structure of porphin, the simplest porphyrin
Heme B group of hemoglobin. An iron (Fe) atom in the middle is shown in red, complexed to four interior nitrogen atoms shown in blue.
Heme B biosynthesis pathway and its modulators. Major enzyme deficiences are also shown.

Porphyrins are a group of heterocyclic macrocycle organic compounds, composed of four modified pyrrole subunits interconnected at their α carbon atoms via methine bridges (=CH−). The parent porphyrin is porphin, and substituted porphines are called porphyrins. The porphyrin ring structure is aromatic, with a total of 26 atoms in the conjugated system. Various analyses indicate that not all atoms of the ring are involved equally in the conjugation or that the molecule's overall nature is substantially based on several smaller conjugated systems. One result of the large conjugated system is that porphyrin molecules typically have very intense absorption bands in the visible region and may be deeply colored; the name "porphyrin" comes from the Greek word πορφύρα (porphyra), meaning purple.

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