Anthocyanin is a natural product with the potential to be used as a cyanine fluorescent dye. The structure shown in Figure 1 is the basic structural unit of anthocyanins, a class of compounds with a flavonoid nucleus as parent, which is mainly composed of two benzene rings and an oxygen-containing heterocyclic ring. These compounds have been widely used in food coloring, medicine, cosmetics and other fields, especially as fluorescent dyes for fluorescent probes.
Fig. 1 The structure of anthocyanin
With the development of research, cyanine fluorophore and its derivatives have been used in exploring Dye-sensitized solar cell (DSSC), textile, probe and other fields. Examples are as follows：
Fig. 2 Working principle of DSSC
Fig. 3 Half-cyanine fluorophore-based dyes
Fig. 4 Mechanism diagram of cyanine fluorescence probe for monitoring H2O2 and GSH
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