FIELD: chemistry.
SUBSTANCE: invention is related to donor-acceptor (DA) polymers with alternating donor D and acceptor A units, which can be used as an electrochromic polymer. Polymers [D-A]n, where n = 2 to 200000, comprising a plurality of D units and a plurality of A units, alternating with the D units. The D units are comprising 3,4-alkylenedioxythiophenes, substituted on the alkylene bridge, 3,4-dialkoxythiophenes, 3,6-dialkoxythieno[3,2-b]thiophenes, or 3,5- dialkoxy-dithieno[3,2-b:2′,3′-d]thiophenes. A method for preparation of the said polymers is based on cross-condensation of a nucleophilic acceptor monomer and an electrophilic donor monomer. The said DA polymers are soluble and display a blue or green colour in a neutral state and are transmissive in an oxidised state.
EFFECT: invention provides electrochromic polymers, that display high optical contrasts and possess switching speeds and switching stability.
18 cl, 14 dwg
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