Spectroelectrochemistry of the dioxygen adduct of an iron(II) C2-capped porphyrin

James H. Cameron; Steven C. Turner

doi:10.1039/DT9930001941

Spectroelectrochemistry of the dioxygen adduct of an iron(II) C₂-capped porphyrin

James H. Cameron, Steven C. Turner

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

The spectrolectrochemistry of the dioxygen adduct of the iron(II) C₂-capped porphyrin complex [Fe^IIL(B)] {H₂L = 5,10,15,20-tetraphenylporphyrin capped at the o-position of each of the phenyl rings by C₆H₂[C(O)O(CH₂)₂O] ₄-1,2,4,5, B = 1-methylimidazole or pyridine} has been studied in both dimethyl sulfoxide and pyridine solutions. In both cases electrooxidation of the adduct produced an unusual spectrum, assigned to a new type of O₂ adduct, [Fe^IIIL(B)(O₂)]⁺. Subsequent electroreduction of the system regenerated the original O₂ adduct, but not in 100% yield, indicating that some dissociation of O₂ had occurred during the redox cycling. This behaviour is discussed in terms of bonding in the Fe-O₂ adducts.

Original language	English
Pages (from-to)	1941-1945
Number of pages	5
Journal	Journal of the Chemical Society, Dalton Transactions
Issue number	13
DOIs	https://doi.org/10.1039/DT9930001941
Publication status	Published - 1993

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@article{b7471c0e1e4b4914a34a53b8e45904b6,

title = "Spectroelectrochemistry of the dioxygen adduct of an iron(II) C2-capped porphyrin",

abstract = "The spectrolectrochemistry of the dioxygen adduct of the iron(II) C2-capped porphyrin complex [FeIIL(B)] \{H2L = 5,10,15,20-tetraphenylporphyrin capped at the o-position of each of the phenyl rings by C6H2[C(O)O(CH2)2O] 4-1,2,4,5, B = 1-methylimidazole or pyridine\} has been studied in both dimethyl sulfoxide and pyridine solutions. In both cases electrooxidation of the adduct produced an unusual spectrum, assigned to a new type of O2 adduct, [FeIIIL(B)(O2)]+. Subsequent electroreduction of the system regenerated the original O2 adduct, but not in 100\% yield, indicating that some dissociation of O2 had occurred during the redox cycling. This behaviour is discussed in terms of bonding in the Fe-O2 adducts.",

author = "Cameron, \{James H.\} and Turner, \{Steven C.\}",

year = "1993",

doi = "10.1039/DT9930001941",

language = "English",

pages = "1941--1945",

journal = "Journal of the Chemical Society, Dalton Transactions",

issn = "1472-7773",

number = "13",

}

TY - JOUR

T1 - Spectroelectrochemistry of the dioxygen adduct of an iron(II) C2-capped porphyrin

AU - Cameron, James H.

AU - Turner, Steven C.

PY - 1993

Y1 - 1993

N2 - The spectrolectrochemistry of the dioxygen adduct of the iron(II) C2-capped porphyrin complex [FeIIL(B)] {H2L = 5,10,15,20-tetraphenylporphyrin capped at the o-position of each of the phenyl rings by C6H2[C(O)O(CH2)2O] 4-1,2,4,5, B = 1-methylimidazole or pyridine} has been studied in both dimethyl sulfoxide and pyridine solutions. In both cases electrooxidation of the adduct produced an unusual spectrum, assigned to a new type of O2 adduct, [FeIIIL(B)(O2)]+. Subsequent electroreduction of the system regenerated the original O2 adduct, but not in 100% yield, indicating that some dissociation of O2 had occurred during the redox cycling. This behaviour is discussed in terms of bonding in the Fe-O2 adducts.

AB - The spectrolectrochemistry of the dioxygen adduct of the iron(II) C2-capped porphyrin complex [FeIIL(B)] {H2L = 5,10,15,20-tetraphenylporphyrin capped at the o-position of each of the phenyl rings by C6H2[C(O)O(CH2)2O] 4-1,2,4,5, B = 1-methylimidazole or pyridine} has been studied in both dimethyl sulfoxide and pyridine solutions. In both cases electrooxidation of the adduct produced an unusual spectrum, assigned to a new type of O2 adduct, [FeIIIL(B)(O2)]+. Subsequent electroreduction of the system regenerated the original O2 adduct, but not in 100% yield, indicating that some dissociation of O2 had occurred during the redox cycling. This behaviour is discussed in terms of bonding in the Fe-O2 adducts.

U2 - 10.1039/DT9930001941

DO - 10.1039/DT9930001941

M3 - Article

SN - 1472-7773

SP - 1941

EP - 1945

JO - Journal of the Chemical Society, Dalton Transactions

JF - Journal of the Chemical Society, Dalton Transactions

IS - 13

ER -

Spectroelectrochemistry of the dioxygen adduct of an iron(II) C2-capped porphyrin

Abstract

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Spectroelectrochemistry of the dioxygen adduct of an iron(II) C₂-capped porphyrin