Differently substituted phthalocyanines: Comparison of calculated energy levels, singlet oxygen quantum yields, photo-oxidative stabilities, photocatalytic and catalytic activities

Hiromi Shinohara*, Olga Tsaryova, Günter Schnurpfeil, Dieter Wöhrle

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

86 Citations (Scopus)

Abstract

Zinc(II) and cobalt(II) phthalocyanines bearing different electron-donating or -withdrawing substituents were prepared. The following properties of these phthalocyanines were investigated: singlet oxygen quantum yields, photo-oxidative stabilities, photocatalytic activities (photooxidation of (S)-(-)-citronellol) and catalytic activities (oxidation of 2-mercaptoethanol). Furthermore, the positions of HOMO/LUMO energy levels of the ground state (S0), first excited singlet state (S1) and first excited triplet state (T1) were calculated. Relationships between HOMO energy levels of S0 and photodecompositions, photocatalytic activities and photo-decompositions, and catalytic activities and HOMO energy levels of S0 were found. Singlet oxygen quantum yields of the different metallophthalocyanines are around 0.55 and independent from the calculated triplet energies.

Original languageEnglish
Pages (from-to)50-57
Number of pages8
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume184
Issue number1-2
DOIs
Publication statusPublished - 2006 Nov 15
Externally publishedYes

Keywords

  • Oxidation mercaptane
  • Photo-oxidative stability
  • Photodecomposition
  • Photooxidation citronellol
  • Phthalocyanines zinc and cobalt

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Physics and Astronomy(all)

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