Thermochromic double-complex salts

C - Chemistry – Metallurgy – 07 – F

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C07F 15/00 (2006.01) C08G 79/00 (2006.01) C09K 9/02 (2006.01) C09K 11/06 (2006.01) G01N 21/25 (2006.01) G01N 21/64 (2006.01)

Patent

CA 1274244

ABSTRACT OF THE DISCLOSURE Compositions of matter and methods of preparation are described for water and air stable, square planar transition metal double-complex salts which contain isonitrile ligands derivatized with long chain aliphatic groups. These salts are composed of two metal-containing complex ions: the cation is a tetrakis isonitrile metal ion and the anion is a tetrahalometallate or tetracyanometallate. These double-complex salts exhibit the novel property of thermochromism and are useful as temperature indicators and in imaging applications.

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