Porphyrins are perhaps the most important and widespread class of natural pigments. The tetraphenyl porphyrins are chemically robust and a group of easily prepared, symmetrical porphyrins.The fragmen- tation mechanism of a specific kind of porphyrins derivative, namely tetraphenyl iron(Ⅲ) porphyrin chlo- Porphyrins are perhaps the most important and widespread class of natural pigments. The tetraphenyl porphyrins are chemically robust and a group of easily prepared, symmetrical porphyrins. The fragmen- tation mechanism of a specific kind of porphyrins derivative, namely tetraphenyl iron (III) porphyrin chlo -