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 1996 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physical and Theoretical Chemistry
Cite this
Magnetization effects in metalless oligo- and polyphthalocyanides recorded by UHF absorption in a magnetic field. / Blyumenfel'd, L. A.; Koksharov, Yu A.; Promyslova, V. V.; Tikhonov, A. N.; Sherle, A. I.; Epshtein, V. R.
In: Russian Journal of Physical Chemistry A, Vol. 70, No. 5, 05.1996, p. 849-853.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Magnetization effects in metalless oligo- and polyphthalocyanides recorded by UHF absorption in a magnetic field
AU - Blyumenfel'd, L. A.
AU - Koksharov, Yu A.
AU - Promyslova, V. V.
AU - Tikhonov, A. N.
AU - Sherle, A. I.
AU - Epshtein, V. R.
PY - 1996/5
Y1 - 1996/5
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0040153747&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0040153747&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0040153747
VL - 70
SP - 849
EP - 853
JO - Russian Journal of Physical Chemistry A
JF - Russian Journal of Physical Chemistry A
SN - 0036-0244
IS - 5
ER -