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

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 journal › Article › peer-review

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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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, 01.05.1996, p. 849-853.

Research output: Contribution to journal › Article › peer-review

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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.",

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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.

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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.

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

Abstract

ASJC Scopus subject areas

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