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

doi:10.1016/S1010-6030(02)00365-9

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 journal › Review article › peer-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 language	English
Pages (from-to)	21-27
Number of pages	7
Journal	Journal of Photochemistry and Photobiology A: Chemistry
Volume	155
Issue number	1-3
DOIs	https://doi.org/10.1016/S1010-6030(02)00365-9
Publication status	Published - Feb 20 2003
Externally published	Yes

All Science Journal Classification (ASJC) codes

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

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10.1016/S1010-6030(02)00365-9

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Photoswitching of the magnetic properties of one-dimensional π-electron systems III. Photochromic polymers with polymethine radicals in the elementary units. / Dietz, F.; Staykov, A.; Karabunarliev, S. et al.
In: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 155, No. 1-3, 20.02.2003, p. 21-27.

Research output: Contribution to journal › Review article › peer-review

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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.",

author = "F. Dietz and A. Staykov and S. Karabunarliev and N. Tyutyulkov",

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AU - Dietz, F.

AU - Staykov, A.

AU - Karabunarliev, S.

AU - Tyutyulkov, N.

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AB - 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.

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

Abstract

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