35results about How to "Long phosphorescence lifetime" patented technology

The invention discloses an acid-base response type organic room-temperature phosphorescent material based on a B-N bond and a preparation method and application thereof. The acid-base response type organic room-temperature phosphorescent material comprises a host matrix and guest molecules doped in the host matrix, the main matrix is poly (4-vinylpyridine); the guest molecule is an aromatic compound with a boric acid ester group; a dynamic B-N coordination bond is formed between boron atoms in the guest molecule and nitrogen atoms of a pyridine group in the host matrix, and the reversible phosphorescence response to an acidic atmosphere and / or an alkaline atmosphere is realized by the acid-base response type organic room temperature phosphorescence material based on the B-N bond through the formation and fracture of the dynamic B-N coordination bond. The B-N bond can also anchor molecules to inhibit non-radiative transition, promote spin-orbit coupling and induce efficient room-temperature phosphorescence. According to the invention, blue-to-red full-color gamut luminescence is realized by adjusting the structure and the concentration of the object, and the blue-to-red full-color gamut luminescent material has super-long service life and high-sensitivity reversible switching The preparation process is simple and environment-friendly, and has wide application prospects in the fields of information encryption, anti-counterfeiting and detection.

The application provides a novel organic room-temperature phosphorescent high molecular material shown in formula I, which takes natural high molecular polysaccharide as raw material, promotes intersystem crossing by introducing aromatic carboxylic acid salt groups, and enhances the interaction between molecular chains. The obtained phosphorescent high molecular material has excellent processability and pH response, and can be made into phosphorescent thin films, phosphorescent coatings and phosphorescent ink phosphorescent coatings, and has important application prospects in the fields of anti-counterfeiting and encryption.