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Ligand exchange thermochromic, (LETC), systems

  • US 9,011,734 B2
  • Filed: 09/12/2011
  • Issued: 04/21/2015
  • Est. Priority Date: 09/01/2006
  • Status: Active Grant
First Claim
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1. A thermochromic system comprising:

  • a) Co(II)b) a first ligand comprising a diol, a triol or a polyol;

    c) a second ligand comprising an oxygen containing ligand or a sulfur-containing ligand, wherein the second ligand is capable of coordinating to a transition metal ion through oxygen or sulfur;

    wherein the system has a reversible, net increase in its ability to absorb light energy in the 400 nm to 1400 nm range due to an increase in concentration of a coordination compound between Co(II) and the second ligand as the temperature of the system is increased.

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