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