| abstract |
(57) [Summary] [Structure] Formula (I) or (II): (Wherein, X is -O -, - S- or -NR 8 -; R 1 and R 2, C 1 -C 4 alkyl, phenyl, etc., or together, -CH = CR 12 -CR 13 = CH-; R 3 is- OR 9 ; R 4 and R 7 are halogen, —OR 9, etc .; R 5 And R 6 are, independently of each other, synonymous with R 1 and R 2 or together, 1,2-benzobuta-1,3-diene- 1,4-diyl; R 8 is C 1 -C 18 alkyl or the like; R 9 is C 6 -C 14 aryl; and R 12 and R 13 are independently the same as R 1 and R 2 , or a mixture of the compound of formula (I) and the compound of formula (II). , Their manufacturing methods and their uses. [Effects] When the above compound is irradiated with light having a wavelength of 300 to 450 nm, a remarkable reversible color change to red, violet or blue is observed, and information can be written / erased cyclically. Can be used as a dynamic storage layer. |