Electrochemistry of nickel(II) porphyrins and chlorins

D. Chang, T. Malinski, Abraham Ulman, K. M. Kadish

Research output: Contribution to journalArticle

Abstract

The electron-transfer mechanisms of five nickel(II) porphyrins and a nickel(II) chlorin were investigated in nonaqueous media. The potentials for oxidation or reduction were monitored by cyclic voltammetry in up to 11 solvents containing either TBAP or TBA(PF 6) as supporting electrolyte. ESR, IR, and electronic absorption spectroscopy were used to monitor the reaction products at both high and low temperature, and these data were used to postulate a reaction mechanism for each of the six investigated complexes. Three difference oxidation mechanisms were found to occur depending upon the nature of the porphyrin or chlorin ring system. In contrast, all of the complexes were reduced by a similar mechanism, which involved formation of anion radicals. Unexpectedly, the three investigated tetraalkylporphyrins showed no evidence for Ni(III) formation as is the case for unsubstituted (TPP)Ni.

Original languageEnglish (US)
Pages (from-to)817-824
Number of pages8
JournalInorganic Chemistry
Volume23
Issue number7
StatePublished - 1984

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Porphyrins
Electrochemistry
electrochemistry
Nickel
porphyrins
nickel
Oxidation
Absorption spectroscopy
Reaction products
Electrolytes
Cyclic voltammetry
Anions
Paramagnetic resonance
oxidation
Electrons
axioms
reaction products
electron transfer
absorption spectroscopy
electrolytes

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

Chang, D., Malinski, T., Ulman, A., & Kadish, K. M. (1984). Electrochemistry of nickel(II) porphyrins and chlorins. Inorganic Chemistry, 23(7), 817-824.

Electrochemistry of nickel(II) porphyrins and chlorins. / Chang, D.; Malinski, T.; Ulman, Abraham; Kadish, K. M.

In: Inorganic Chemistry, Vol. 23, No. 7, 1984, p. 817-824.

Research output: Contribution to journalArticle

Chang, D, Malinski, T, Ulman, A & Kadish, KM 1984, 'Electrochemistry of nickel(II) porphyrins and chlorins', Inorganic Chemistry, vol. 23, no. 7, pp. 817-824.
Chang D, Malinski T, Ulman A, Kadish KM. Electrochemistry of nickel(II) porphyrins and chlorins. Inorganic Chemistry. 1984;23(7):817-824.
Chang, D. ; Malinski, T. ; Ulman, Abraham ; Kadish, K. M. / Electrochemistry of nickel(II) porphyrins and chlorins. In: Inorganic Chemistry. 1984 ; Vol. 23, No. 7. pp. 817-824.
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