Cation-Radicals of Triarylamines in Optical-Recording Media

2 Cation-Radicals of Triarylamines in Optical-Recording Media 

3 Ladder Polymerization oe Fluoranthene-Based Cation-Radicals AS Route to Electrochromic Materials 

As a result, an insolnble transparent blue polymer film forms on the electrode. Electrochemical oxidation of the film in acetonitrile initiates a rapid color change from bine to pale gray, while redaction to the first or second cathodic waves causes the film to become pale green or orange, respectively. These electrochromic effects are stable and reversible when air and water are excluded, even after 30,000 rednction cycles. The material has potential uses in electrochromic or electroluminescent devices. 

Stable ladder oligosilanes are also of interest. The potassium metal reduction of the neutral ladder oligosilanes containing 6-12 silicon atoms fully substituted by isopropyl groups leads to the formation of corresponding anion-radicals that are highly stable at room temperatnre (Kyushin et al. 2000). These silanes can be nsed as electric switchers. 

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