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Electrochromic organic polymer synthesis and devices utilizing electrochromic organic polymers

  • US 6,747,780 B2
  • Filed: 06/25/2002
  • Issued: 06/08/2004
  • Est. Priority Date: 06/25/2001
  • Status: Expired due to Term
First Claim
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1. A method for synthesizing an electrochromic polymer suitable for use as a cathodic layer within a laminated electrochromic device;

  • comprising the steps of;

    (a) providing a first quantity of 3,4-dimethoxythiophene and a second quantity of 2,2-dimethyl-1,3-propanediol;

    (b) dissolving the first and second quantities in a sufficient quantity of toluene, such that substantially all of the first and second quantities dissolve in the toluene to form a solution; and

    (c) refluxing the solution for at least eight hours, such that;

    (i) the solution boils;

    (ii) the toluene vaporizes, condenses and returns to the solution; and

    (iii) the first and second quantities react to form [3,3-dimethyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine].

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