| abstract |
Embodiments of the present invention are directed to cross donor-dwelling (DA) polymers that are soluble and exhibit a blue or green neutral state that oxidizes to a transmissive state used as an electrochrome polymer. D unit is 3,4-dioxythiophene, 3,6-dialkoxythieno [3,2-b] thiophene or 3,5-dialkoxy-dithieno [3,2-b: 2 ', 3 '-d] has a thiophene group. Embodiments of the present invention are directed to a method for preparing a cross-DA polymer sequence of a DA polymer by cross-condensation of nucleophilic acceptor units and electrophilic donor units. |