Magnetization effects in metalless oligo- and polyphthalocyanides recorded by UHF absorption in a magnetic field

L. A. Blyumenfel'd, Yu A. Koksharov, V. V. Promyslova, A. N. Tikhonov, A. I. Sherle, V. R. Epshtein

Research output: Contribution to journalArticle

Abstract

The magnetic properties of polymers with azoporphyrin macrocycles in the conjugate chain were investigated. The compounds were synthesized by polycyclotetramerization of tetranitrilopyrromellitic acid in a benzene solution or a monomer melt. The EPR spectra were recorded at magnetic field strengths from 0 to 6000 Oe. For a number of samples, in addition to the usual free-radical signals, a phenomenon of magnetic hysteresis for the UHF absorption at low fields (0-1000 Oe) was observed. It was concluded that the hysteresis-type UHF absorption and magnetic memory effects are probably explained by collective magnetic interactions in the oligo-and polyphthalocyanides.

Original languageEnglish
Pages (from-to)849-853
Number of pages5
JournalRussian Journal of Physical Chemistry A
Volume70
Issue number5
Publication statusPublished - May 1 1996
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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  • Cite this

    Blyumenfel'd, L. A., Koksharov, Y. A., Promyslova, V. V., Tikhonov, A. N., Sherle, A. I., & Epshtein, V. R. (1996). Magnetization effects in metalless oligo- and polyphthalocyanides recorded by UHF absorption in a magnetic field. Russian Journal of Physical Chemistry A, 70(5), 849-853.