Picosecond charge separation and triplet formation in a closely spaced photosynthetic model system

U. Hofstra*, T. J. Schaafsma, G. M. Sanders, M. Van Dijk, H. C. Van Der Plas, D. G. Johnson, M. R. Wasielewski

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Intramolecular electron transfer has been investigated for three diphenyletioporphyrins covalently linked to an anthraquinone via a sulfonyloxy bridge at the ortho, meta or para substitution position of the phenyl groups of the porphyrin. The ortho-linked porphyrin is strongly folded and exhibits extremely fast charge separation (CS) and recombination (CR) between porphyrin and anthraquinone (kCS > 3 × 1011 s-1 and kCR = 5.9 × 1010 s-1 in CH2Cl2). The less-folded meta- and para-linked porphyrins have smaller electron transfer rate constants. For the ortho-linked compound in toluene a biphasic charge separation is observed. The triplet state is formed in high yield via fast intersystem crossing in the charge-separated state.

Original languageEnglish (US)
Pages (from-to)169-175
Number of pages7
JournalChemical Physics Letters
Volume151
Issue number1-2
DOIs
StatePublished - Oct 7 1988

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Picosecond charge separation and triplet formation in a closely spaced photosynthetic model system'. Together they form a unique fingerprint.

Cite this