This invention relates to a novel class of cationic fused-ring conjugated
pyrrole derivatives and their applications in the pharmaceutical field, characterized by having the following structures (I) and (II): Specifically, this invention relates to a class of novel cationic fused-ring conjugated
pyrrole derivatives with advantages such as
structural stability, low aggregation resistance, good amphiphilicity, strong absorption in the near-
infrared region, high photodynamic activity, and wide applicability. These compounds can be used as photosensitizing drugs or reagents for the diagnosis and treatment of microbial infections, tumors,
macular degeneration,
actinic keratosis, port-
wine stains,
condyloma acuminata, and other diseases. They can also be used as fluorescent dyes and reagents in near-
infrared fluorescence imaging, fluorescent labeling, or
optoelectronic materials.