Minodil-based tunable room temperature phosphorescent carbon dot composite material, preparation method and application thereof in dynamic information encryption

By combining minoxidil with boric acid to form carbon dot composite materials, the problems of limited precursor selection and narrow phosphorescence color control have been solved, achieving efficient and safe phosphorescence performance and simple preparation, which can be applied to dynamic information encryption and advanced anti-counterfeiting.

CN122080930APending Publication Date: 2026-05-26GUILIN UNIVERSITY OF TECHNOLOGY
0 Cites 0 Cited by

Patent Information

Application Number
CN202610212180.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-13
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing carbon dot RTP materials suffer from limited precursor selection, narrow phosphorescence color control range, poor biocompatibility, and complex preparation processes, making it difficult to achieve efficient and safe phosphorescence performance.

Method used

Using minoxidil as a carbon source and combining it with boric acid, nitrogen-doped carbon dot composite materials are synthesized via a one-step hydrothermal method to form BN covalent bonds, achieving continuous tunability of phosphorescence color and lifetime, and simplifying the preparation process.

Benefits of technology

It achieves a phosphorescence lifetime of up to 1.43 seconds, a quantum yield of up to 20.9%, good biocompatibility, is suitable for large-scale production, and has multi-level dynamic information encryption and advanced anti-counterfeiting functions.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a minoxidil-based color-adjustable room-temperature phosphorescent carbon dot composite material as well as a preparation method and application thereof. The composite material is synthesized in situ by one-step heat treatment of a clinical drug minoxidil (MND) and boric acid (BA) in a water phase. The minoxidil is used as a carboxyl-free aminopyrimidine molecule, part of the minoxidil forms nitrogen-doped carbon dots in the pyrolysis process, part of the minoxidil exists in an incompletely carbonized molecular state, the minoxidil and the minoxidil are firmly anchored in a BA-derived rigid boron oxide glass matrix through a B-N covalent bond, and non-radiative transition of triplet excitons is effectively inhibited. By regulating and controlling the doping amount of minoxidil (preferably, the mass ratio of MND to BA is 1: 60-1: 3), the phosphorescence emission color of the material can be continuously adjusted from blue to green, and the highest photoluminescence quantum yield of 20.9% and the room-temperature phosphorescence life of 1.43 seconds can be obtained. The composite material has important application value in the fields of multi-stage dynamic information encryption, time-resolved anti-counterfeiting, intelligent optical devices and the like.
Need to check novelty before this filing date? Find Prior Art