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Ancillary electrodes used were a silver wire as a reference and platinum wire as a counter. Spectroelectrochemical and switching experiments were performed with polymer coated on ITO and mounted within a 1 cm quartz cuvette. The cuvette was also fitted with a platinum wire counter electrode and silver wire pseudoreference electrode. 1 M TBAH, was then added to the cell in order to make good contact with all electrodes and fully flood the spectrometer light path. 3 Reagents and Synthesis. All ligands were synthesized from the appropriate hydrazide and either the appropriate diacid chloride, dihydrazide or diisocyanate.

Within this voltage range the device showed good stability and a black to red color change under anaerobic conditions. When the applied potential was greater than this range, the electrochromic response was gradually lost. Degradation was also observed when the device was operated in die presence of oxygen. ; ACS Symposium Series; American Chemical Society: Washington, DC, 2004. 49 Conclusions The construction of all-plastic PPTZPQ-based electrochromic devices with interesting color changes showed the potential use of PPTZPQ as an electrochromic material in the building of practical devices.

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