Coumarin derivative modified donor-receptor type high polymer material as well as preparation method and application thereof

The invention discloses a coumarin derivative modified donor-receptor type high polymer material as well as a preparation method and application thereof, and belongs to the technical field of functional polymers. Structural optimization is carried out by increasing a D-pi-A structure and changing different electron donor units on a donor, intersystem crossing (ISC) efficiency is adjusted through structural design, intramolecular charge transfer (ISC) is improved, formation of hydroxyl radicals (. OH) is further promoted, gram-positive bacteria, gram-negative bacteria and fungi are specifically distinguished, and meanwhile, the specific differentiation of the gram-positive bacteria, the gram-negative bacteria and the fungi is realized. And high-efficiency killing of special strains can be realized through photodynamic therapy. The coumarin derivative modified donor-acceptor type high polymer material is applied to reagents for detecting, distinguishing and killing different types of pathogenic bacteria, has th