A novel method for synthesis of substitutedμ-oxo-bis[tetraphenyl porphyrinatoiron

]

compounds([TRPPFe

]

2

O) based on the reaction among free base porphyrins(TRPPH

2

)

FeSO

4

·7H

2

O and H

2

O in one pot was proposed and investigated.Four kinds of[TRPPFe

]

2

O were synthesized by this novel synthetic method

and their structures were characterized by elemental analysis

infrared spectra and UV-vis spectroscopy.The reaction conditions

including the effect of different iron salts on the formation of[TRPPFe

]

2

O

the reaction time between FeSO

4

·7H

2

O and TRPPH

2

the molar ratio of FeSO

4

·7H

2

O/TRPPH

2

as well as the volume ratio of H

2

O/DMF

were investigated.The [TRPPFe

]

2

O yield of 93%-98%could be obtained under the following optimal conditions:the reaction time of FeSO

4

·7H

2

O with TRPPH

2

was about 10 h

the molar ratio of FeSO

4

·7H

2

O/TRPPH

2

about 5:1

and the volume ratio of H

2

O/DMF exceeded 2:1.Further research indicated that only TRPPFeCl were formed once FeSO

4

·7H

2

O was replaced by FeCl

2

·4H

2

O

the reason of which might be that halogen ions in iron salts interfered the formation of [TRPPFe

]

2

O

suggesting that halogen ions should be avoided in this novel synthetic method.