Spin transition material

Details Spin transition material Spin transition material

C - Chemistry, Metallurgy

07

F

C07F 15/02 (2006.01) B82B 3/00 (2006.01) C07D 249/04 (2006.01) C09B 45/00 (2006.01) C09B 67/08 (2006.01) C09B 67/22 (2006.01) C09D 5/26 (2006.01) G11B 7/245 (2006.01) G11B 7/246 (2006.01) G11B 7/249 (2006.01)

Patent

CA 2690138

The invention relates to a material composed of at least one spin transition compound. The compound corresponds to the formula Fe1-mMm(R-Trz)3XbYc (I) in which M is a metal having 3d4, 3d5, 3d6 or 3d7 configuration, other than Fe; O = m = l; R-Trz represents a 1,2,4-triazole ligand bearing a substituent R on the nitrogen in the 4 position; R is an alkyl group or an R1R2N- group in which R1 and R2 represent, independently of one another, H or an alkyl radical; X represents at least one non-colouring monovalent or divalent anion; Y represents at least one anion that has a colouring group; b and c are chosen so that the electroneutrality of the compound (I) is respected. The invention also relates to the process for preparing the material, and to the use thereof as a thermochromic pigment, as a support for data storage, or as an optical limiter.

L'invention concerne un matériau constitué par au moins un composé à transition de spin. Le composé répond à la formule Fe1-m M m(R-Trz)3 X b Y c (I) dans laquelle M est un métal ayant une configuration 3d4, 3d5 3d6 ou 3d7, autre que Fe; O<=m<=l; R- Trz représente un ligand 1,2,4-triazole portant un substituant R sur l'azote en position 4; R est un groupe alkyle ou un groupe R1R2N- dans lequel R1 et R2 représentent chacun indépendamment de l'autre H ou un radical alkyle; X représente au moins un anion monovalent ou divalent non colorant; Y représente au moins un anion qui a un groupe colorant; b et c sont choisis de telle sorte que l'électroneutralité du composé (I) soit respectée. L'invention porté également sur le procédé de préparation du matériau, et sur son utilisation comme pigment thermochrome, comme support pour le stockage de données, ou comme limitateur optique.

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