Porphyrin chemistry is an indispensable part of organic chemistry research. There are typical aromaticity as the porphyrins have a large conjugation system in structure. Porphyrins possess excellent photoelectric properties,unique photodynamic therapy effects,high catalytic activities,and presence in heme,chlorophyll, vitamin B12,catalase and other organic biomolecules extensively,all of which are attractive to scientists in-depth study. In this article,we discussed the progress of porphyrins in three directions: substituted porphyrins,contracted porphyrins,and expanded porphyrins. The synthet...
