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

James H. Cameron, Steven C. Turner

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)1941-1945
Number of pages5
JournalJournal of the Chemical Society, Dalton Transactions
Issue number13
DOIs
Publication statusPublished - 1993

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Spectroelectrochemistry
Porphyrins
Iron
Oxygen
Electrooxidation
Dimethyl Sulfoxide
pyridine
Oxidation-Reduction
5,10,15,20-tetraphenylporphyrin
1-methylimidazole

Cite this

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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",

}

Spectroelectrochemistry of the dioxygen adduct of an iron(II) C2-capped porphyrin. / Cameron, James H.; Turner, Steven C.

In: Journal of the Chemical Society, Dalton Transactions, No. 13, 1993, p. 1941-1945.

Research output: Contribution to journalArticle

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

SP - 1941

EP - 1945

JO - Journal of the Chemical Society, Dalton Transactions

JF - Journal of the Chemical Society, Dalton Transactions

SN - 1472-7773

IS - 13

ER -