▎ 摘　　要

NOVELTY - Multi-optical performance carbon dots comprises a core for emitting blue light and a surface for emitting red light, distributed on the surface of core. The core is a graphene structure formed by 1,2-phenylenediamine crosslinking, and the surface is a reactive group. USE - Multi-optical performance carbon dots used as encryption material in preparation of anti-counterfeiting materials (claimed). ADVANTAGE - The carbon dots can be prepared using economical and easy-to-obtain raw materials and catalysts, without requiring complicated pretreatment and purification, by energy-saving and time-saving method industrially. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the carbon dots, which involves (1) mixing and grinding aluminum chloride hexahydrate crystals as catalyst, and 1,2-phenylenediamine crystals as carbon and nitrogen sources to obtain a mixture, (2) transferring the mixture to a reactor, and heating by in-situ solvent-free method, (3) obtaining solid powder directly as blue fluorescent carbon dots after the reaction is completed, without purification, and (4) dissolving the solid powder in a solvent to serve as red fluorescent carbon dots.