| abstract |
The present invention provides a kind of nir dye and its preparation method and application of half flower cyanines structure, the structural formula of the dyestuff as shown in formula I, R 1 For straight chain, branch or cyclic alkyl with 1 to 32 carbon atom；R 2 For hydrogen, bromine, methoxyl group, N, one kind in N dimethylaminos, ethyoxyl, hydroxyl, Carboxvmethoxv or acetyl methoxyl group.The dyestuff is made with Cy7 cyanine dyes and the resorcin reaction with benzimidazole.The present invention introduces benzimidazole group in the dyestuff of half flower cyanines structure, and gained dyestuff not only has absorption and transmitting near infrared region, and has response to the pH value of environment. |