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Tuning of ferromagnetic spin interactions in polymeric aromatic amines via modification of their π-conjugated system.
- Source :
-
The journal of physical chemistry. B [J Phys Chem B] 2012 Dec 27; Vol. 116 (51), pp. 14968-78. Date of Electronic Publication: 2012 Dec 13. - Publication Year :
- 2012
-
Abstract
- Polyarylamine containing meta-para-para-aniline units in the main chain and meta-para-aniline units in the pendant chains was synthesized. The polymer can be oxidized to radical cations in chemical or electrochemical ways. The presence of meta-phenylenes in the polymer chemical structure allows for the ferromagnetic coupling of electronic spins, which leads to the formation of high spin states. Detailed pulsed-EPR study indicates that the S = 2 spin state was reached for the best oxidation level. Quantitative magnetization measurements reveal that the doped polymer contains mainly S = 2 spin states and a fraction of S = 3/2 spin states. The efficiency of the oxidation was determined to be 74%. To the best of our knowledge, this polymer is the first example of a linear doped polyarylamine combining such high spin states with high doping efficiency.
Details
- Language :
- English
- ISSN :
- 1520-5207
- Volume :
- 116
- Issue :
- 51
- Database :
- MEDLINE
- Journal :
- The journal of physical chemistry. B
- Publication Type :
- Academic Journal
- Accession number :
- 23205911
- Full Text :
- https://doi.org/10.1021/jp309935a