Ligand exchange thermochromic, (LETC), systems
First Claim
Patent Images
1. A thermochromic system comprising:
- a) Ni(II);
b) a first ligand which forms a Lε
MLC with Ni(II);
c) a second ligand which forms a Hε
MLC with Ni(II); and
d) a polymerwherein the system is in the form of a solid or semi-solid layer and the system exhibits a reversible net increase in light energy absorbance in the 400 nm to 1400 nm range as the temperature of the system is increased.
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Abstract
Ligand exchange of thermochromic, LETC, systems exhibiting a reversible change in absorbance of electromagnetic radiation as the temperature of the system is reversibly changed are described. The described LETC systems include one or more than one transition metal ion, which experiences thermally induced changes in the nature of the complexation or coordination around the transition metal ion(s) and, thereby, the system changes its ability to absorb electromagnetic radiation as the temperature changes.
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Citations
18 Claims
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1. A thermochromic system comprising:
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a) Ni(II); b) a first ligand which forms a Lε
MLC with Ni(II);c) a second ligand which forms a Hε
MLC with Ni(II); andd) a polymer wherein the system is in the form of a solid or semi-solid layer and the system exhibits a reversible net increase in light energy absorbance in the 400 nm to 1400 nm range as the temperature of the system is increased. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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- 10. A thermochromic system which comprises Ni(II) in a polymer wherein the system has a reversible, net increase in its ability to absorb in the 400 nm to 1400 nm range due to a change in coordination of the Ni(II) in a coordination compound of Ni(II) as the temperature of the system is increased.
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17. A thermochromic system comprising:
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a) Ni(II) b) a first ligand comprising a pseudohalide or a halide, wherein the halide is selected from the group consisting of Cl—
, Br—
, I— and
combinations thereof, andc) a second ligand comprising a nitrogen-containing ligand, a phosphorus-containing ligand or a sulfur-containing ligand; wherein the system has a reversible, net increase in its ability to absorb light energy in the 400 nm to 1400 nm range as the temperature of the system is increased. - View Dependent Claims (18)
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Specification