Title:
【発明の名称】スピン遷移化合物およびその使用
Document Type and Number:
Japanese Patent JP3361558
Kind Code:
B2
Abstract:
The invention relates to the use of chemical substances which show exclusively thermally induced spin transitions between two spin states stable at room temperature, these transitions being associated with a hysteresis phenomenon, and resulting in an abrupt change in the colour of the molecules, to produce a medium for information storage, processing and/or display by thermal writing, optical scanning and thermal erasing. Especially, in one use, such a medium is produced comprising at least one layer of chemical substances which include a network with a molecule comprising a metal element Fe(II), or Fe(III) or Co(II) in combination with at least one ligand chosen from substituted triazoles which correspond to the formula: in which the radical R is a CnH2n+1 alkyl, or else the radical R is an amine NL2 where L is chosen from H and an alkyl, this molecule additionally comprising one or a number of anions chosen, for example, from BF4<->, ClO4<->, CO3<2->, Br<-> or Cl <- > , and this network containing a defined amount of water which is not ligand-bonded and which is guaranteed by the presence of a hygroscopic species. Application: data display screens.
Inventors:
Olivier Can
Charlotte je
Jonah Crobe
Charlotte je
Jonah Crobe
Application Number:
JP31342792A
Publication Date:
January 07, 2003
Filing Date:
November 24, 1992
Export Citation:
Assignee:
Konin Krekka Philips Electronics NV
International Classes:
C07D249/14; C09K3/00; G02F1/00; G09F9/00; G11B7/00; G11B7/0055; G11B7/006; C07D249/08; G11B7/249; G11B7/253; (IPC1-7): C07D249/08; C07D249/14; C09K3/00; G02F1/00; G09F9/00; G11B7/00; G11B7/24
Attorney, Agent or Firm:
Akihide Sugimura (5 outside)