Photoswitching of the magnetic properties of one-dimensional π-electron systems III. Photochromic polymers with polymethine radicals in the elementary units

F. Dietz, A. Staykov, S. Karabunarliev, N. Tyutyulkov

Research output: Contribution to journalReview articlepeer-review

4 Citations (Scopus)

Abstract

The switching of the magnetic properties of the photoisomeric structures of polymers with photochromic [2,2]-metacyclophanene, [2,2]-metacyclophanediene, 10-benzylidene-anthrone or 9-benzylidene-9,10-anthracene fragments and polymethine radical fragments of Wurster and Weitz type within the elementary units is investigated theoretically. The band theory is used to calculate the effective exchange interaction of the open-ring and closed-ring photoisomers, respectively. A real switching from a ferromagnetic to an anti-ferromagnetic state of the isomers has been found only for a few polymers, while in most cases an increase or decrease of the effective exchange integral at the photocyclization has been pointed out.

Original languageEnglish
Pages (from-to)21-27
Number of pages7
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume155
Issue number1-3
DOIs
Publication statusPublished - Feb 20 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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