| 摘要 |
The invention relates to a material composed of nanoparticles essentially comprising a spin transition compound. The compound corresponds to the formula [(Fe1-yMyL3)wL3][X2/x(1-z/x')Y2z/x']w in which L represents a 1,2,4-triazole ligand carrying an R substituent on the nitrogen in the 4 position; X is an anion having the valency x, 1<=x<=2; Y is an anion other than X having the valency x', 1<=x'<=2; R is an alkyl group or an R1R2N- group in which R1 and R2 represent, each independently of the other, H or an alkyl radical; M is a metal having a 3d4, 3d5, 3d6 or 3d7 configuration, other than Fe; 0<=y<=1; 0<=z<=2; 3<=w<=1500. Applications: thermochromic pigment, data storage, optical limiters, contrast agent. |
