Proceedings of the Polymer Society of Korea Conference (한국고분자학회:학술대회논문집)
- 2006.10a
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- Pages.23-24
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- 2006
Magnetic and Magneto-Optical Properties of Conjugated Polymers: A New Frontier
- Gangopandhyay, Palash (College of Optical Sciences, University of Arizona) ;
- Foerier, Stijn (Department of Chemistry, K U Leuven) ;
- Vangheluwe, M. (Department of Chemistry, K U Leuven) ;
- Koeckelberghs, Guy (Department of Chemistry, K U Leuven) ;
- Verbiest, Thiery (Department of Chemistry, K U Leuven) ;
- Persoons, Andr (College of Optical Sciences, University of Arizona)
- Published : 2006.10.13
Abstract
Magnetic and magneto-optical properties of regioregular (>99%) poly(3-dodecylthiopenes are investigated. Faraday rotation of spin-coated films show extremely large Verdet constants, falling strongly with decreasing regioregularity. EPR spectroscopy at room temperature shows the presence of about 1 spin/190 monomers, indicative of delocalisation beyond a single polymer chain. SQUID measurements on the polymer give an effective magnetic moment of about 48900 mB, corrsponding to a S-value of 25.000. The Weiss-constant is 1.33 K indicating ferromagnetic coupling. Our experimental results show that organic polymer magnets can be prepared. Large MO effects allow the use of these materials in all-organic MO-sensors and devices.
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