US 11,993,615 B2
Altering thermochromic transition temperature in transition metal ethylenediamine complexes by substitutional doping of anionic species
James August Ridenour, Arlington, VA (US)
Assigned to The Government of the United States of America, as represented by the Secretary of the Navy, Arlington, VA (US)
Filed by The Government of the United States of America, as represented by the Secretary of the Navy, Arlington, VA (US)
Filed on Oct. 7, 2022, as Appl. No. 17/961,585.
Prior Publication US 2024/0116968 A1, Apr. 11, 2024
Int. Cl. C08K 3/08 (2006.01); B41M 5/28 (2006.01); C07F 15/04 (2006.01)
CPC C07F 15/045 (2013.01) 8 Claims
OG exemplary drawing
 
1. A tunable thermochromic material comprising:
a first instance of an organic ligand complexed with a metal salt; and two different anions present in a first proportion; and
a second instance of the organic ligand complexed with the metal salt and the two different anions, wherein the two different anions are present in a second proportion differing from the first proportion,
wherein, as a consequence of the different proportions, the first instance has a different thermochromic transition temperature from that of the second instance,
wherein the thermochromic transition is reversible with a change in temperature, and
wherein the organic ligand is an N,N′-disubstituted diamine.