Review on N-confused porphyrin

Abstract

We all know how vital porphyrin is to our body, from binding haemoglobin and iron to carrying oxygen to our organs and tissues. Recently, there has been a discovery about a new isomer of porphyrin called N-confused porphyrin. Its chemistry is very different and exciting. From there, scientists have explored many corners of this confusion chemistry, from doubly confused coordination to its supramolecular architecture, it has an identical backbone structure as porphyrin (1,1,1,1). NCP, on the other hand, has an additional pyrrolic moiety called a "confused pyrrole" that is linked to the surrounding meso-carbons at the α and β-positions. The position of pyrrolic N-H and β-CH are shifted as a result of this unusual linkage. Resulting, NCP contains an NNNC core and an outward-pointing N atom. When a metal is co-ordinated in the core, a kind of organometallic complex having a carbon-metal bond is formed. On the other hand, the peripheral nitrogen atom serves as a H-bonding donor/acceptor and a metal coordination site.