Abstract: 1,1'-dihexanal-4,4'-bipyridinium chloride was designed and synthesized.For preparing a novel gel eletrochromic device,viologen was immobilized in the PVA gel electrolytes by aldolization,and the counter electrode was deposited Prussian blue via electro-deposition.This device avoids the leakaging risk of liquid electrolytes and extends the appllications of eletrochromic devices.The structure and eletrochromic porperties were studied by ¹HNMR and UV-Vis spectra.The results indicate that the eletrochromic devices with viologen immobilized in gel electrolytes achieves high-performance in terms of optical contrast (47% at 530 nm), switching time(<4 s) and cyclability.

Key words: viologen, eletrochromism, PVA gel