Metal-conjugated polyphenol supramolecular nano-composite as well as preparation method and application thereof

The invention belongs to the technical field of nano synthesis, and particularly relates to a metal-conjugated polyphenol supramolecular nano compound as well as a preparation method and application thereof. The metal-conjugated polyphenol supramolecular nano-composite obtained by the invention not only has excellent water solubility, stability and optical performance, but also has excellent reducing capacity, free radical scavenging capacity, chemical activity and biological affinity, and overcomes the defects that a natural plant polyphenol compound is insoluble in water and low in bioavailability at the same time; no organic solvent or strong alkali solution is used in the synthesis process, the environment friendliness is high, the synthesis method is simple, the condition is mild, the operation is simple and convenient, one-pot continuous synthesis can be realized, and the method is suitable for large-scale continuous production.