Exploiting Length Scales of Exchange-Bias Systems to Fully Tailor Double-Shifted Hysteresis Loops
✍ Scribed by S. Brück; J. Sort; V. Baltz; S. Suriñach; J. S. Muñoz; B. Dieny; M. D. Baró; J. Nogués
- Book ID
- 101413358
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 357 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0935-9648
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✦ Synopsis
5.0 × 10 -4 M solution in toluene, 2.0 × 10 -4 mmol for both PF-G2 and WPF-G2R3), monomer R (0.60 mL 5.0 × 10 -4 M solution in toluene, 3.0 × 10 -4 mmol for both PF-R3 and WPF-G2R3), N-methyl-N,Ndioctyl-1-octanaminium chloride (Aliquat 336; 0.10 g, 0.25 mmol), and tetrakis(triphenylphosphine)palladium (11.0 mg, 0.01 mmol) under argon was added 2 mL 2 M aqueous potassium carbonate and 6 mL toluene. The mixture was stirred at 90 °C for 48 h and then poured into methanol. The precipitate was collected by filtration, dried, and then dissolved in dichloromethane. The solution was washed with water and dried over anhydrous Na 2 SO 4 . After most of the solvent had been removed, the residue was poured into stirred methanol to give a fiber-like solid. The polymer was further purified by extraction with acetone for 24 h. The reprecipitation procedure with dichloromethane/methanol was then repeated several times. The final product, a light-yellow or light-pink fiber, was obtained after drying in vacuum with a yield of 45-60 %.