Multiple decay pathways and electron transfer in excited ion-paired zinc-copper porphyrins

laser photolysis and time-resolved EPR spectroscopy

Muhamad Hugerat, Haim Levanon, Emmanuel Ojadi, L. Biczók, Henry Linschitz

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Oppositely charged zinc and copper porphyrins form ion-paired dimers which show biphasic decay of flash transients in fluid solution. In a glass at low temperature, two photoexcited components are also seen by time-resolved EPR. On the basis of lifetime, absorption spectrum, oxygen sensitivity and EPR spectrum, the long-lived transient is assigned to the zinc porphyrin triplet. The short-lived species is attributed to an ion radical-pair formed by electron transfer from an excited singlet precursor.

Original languageEnglish
Pages (from-to)400-406
Number of pages7
JournalChemical Physics Letters
Volume181
Issue number5
DOIs
Publication statusPublished - Jul 5 1991

Fingerprint

Porphyrins
Photolysis
porphyrins
Paramagnetic resonance
photolysis
Zinc
Copper
electron transfer
zinc
Spectroscopy
Ions
copper
Electrons
Lasers
decay
Dimers
spectroscopy
lasers
flash
Absorption spectra

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Surfaces and Interfaces

Cite this

Multiple decay pathways and electron transfer in excited ion-paired zinc-copper porphyrins : laser photolysis and time-resolved EPR spectroscopy. / Hugerat, Muhamad; Levanon, Haim; Ojadi, Emmanuel; Biczók, L.; Linschitz, Henry.

In: Chemical Physics Letters, Vol. 181, No. 5, 05.07.1991, p. 400-406.

Research output: Contribution to journalArticle

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