| Title: |
Syntheses and CO reduction activities of π-expanded/extended iron porphyrin complexes. |
| Authors: |
Okabe, Yuki, Lee, Sze, Kondo, Mio mio@ims.ac.jp, Masaoka, Shigeyuki masaoka@ims.ac.jp |
| Source: |
Journal of Biological Inorganic Chemistry (JBIC). Jul2017, Vol. 22 Issue 5, p713-725. 13p. |
| Subject Terms: |
*IRON porphyrins, *CARBON monoxide, *RENEWABLE energy sources, *ELECTROCHEMICAL analysis, *SPECTROMETRY |
| Abstract: |
The construction of molecular catalysts that are active toward CO reduction is of great significance for designing sustainable energy conversion systems. In this study, we aimed to develop catalysts for CO reduction by introducing aromatic substituents to the meso-positions of iron porphyrin complexes. Three novel iron porphyrin complexes with π-expanded substituents (5,10,15,20-tetrakis(pyren-1-yl)porphyrinato iron(III) chloride ( Fe-Py)), π-extended substituents (5,10,15,20-tetrakis((1,1′-biphenyl)-4-yl)porphyrinato iron(III) chloride ( Fe-PPh)) and π-expanded and extended substituents (5,10,15,20-tetrakis(4-(pyren-1-yl)phenyl)porphyrinato iron(III) chloride ( Fe-PPy)) were successfully synthesized, and their physical properties were investigated by UV-vis absorption spectroscopy and electrochemical measurements under Ar in comparison with an iron complex with a basic framework, 5,10,15,20-tetrakis(phenyl)porphyrinato iron(III) chloride ( Fe-Ph). Moreover, the catalytic activity of the complexes was studied by electrochemical measurements under CO, and it is found that the complex with the π-expanded substituents exhibits the highest activity among these complexes. [ABSTRACT FROM AUTHOR] |
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