The role of the attachment of the fluorescent dye is to help the fluorescent dye develop color, improve the compatibility of the fluorescent dye and the downstream resin, and protect the performance of the fluorescent dye. Generally, the carrier resin is a strong polar resin, on the one hand, it can help the color and increase the fluorescence efficiency; on the other hand, it has good compatibility with fluorescent dyes.
Structural characteristics of fluorescent dyes:
1. The molecule contains a group that emits fluorescence, such as a carbonyl group, a nitrogen-nitrogen double bond, and a carbon-nitrogen double bond.
2. Molecules contain chromophore groups. The chromophore group makes the spectrum red-shifted and increases the fluorescence efficiency, such as primary amine group, secondary amine group, hydroxyl group, ether bond, amide group, etc.
3. The molecule contains a conjugated π bond with a rigid planar structure. The larger the intramolecular conjugated system, the stronger the planarity and the higher the fluorescence intensity.
The structural characteristics of the fluorescent dyes shared with you above, we can see that the fluorescent dyes are a more distinctive dye.