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 language | English |
|---|---|
| Pages (from-to) | 849-853 |
| Number of pages | 5 |
| Journal | Russian Journal of Physical Chemistry A |
| Volume | 70 |
| Issue number | 5 |
| Publication status | Published - May 1 1996 |
| Externally published | Yes |
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
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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.