Affiliation:
1. Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education Guangdong Engineering Technology Research Center for High-Performance Organic and Polymer Photoelectric Functional Films School of Chemistry Sun Yat-sen University 510275 Guangzhou P. R. China
2. School of Chemical Engineering and Light Industry Guangdong University of Technology, Guangzhou 510006 Guangzhou P. R. China
3. Guangdong Laboratory of Chemistry and Fine Chemical Industry Jieyang Center 515200 Jieyang P. R. China
Abstract
AbstractThe issue of information security has become a concern in all aspects of daily life, prompting the development of encryption technologies. Therein, optical encryption using color/graphical patterns holds great potential. However, current approaches generally rely on monochromic change upon one or more stimuli, limiting their further application in advanced confidential encryption. Herein, we propose a delicate strategy based on a co‐assembly system of perylene bisimides (PBI)/polyvinyl alcohol (PVA) that demonstrates stepwise stimuli response and multicolor changes. The color of the supramolecular system changes from red to purple under the stimulus of UV light, and to orange when exposed to water. The multidimensional chromic response is achieved by an evolution process including the generation, packing rearrangement and quenching of PBI radical anions/dianions. With the virtues of photo‐ and hydrochromism, this novel co‐assembly system was successfully employed for advanced anticounterfeiting and versatile information encryption applications.
Funder
National Natural Science Foundation of China
Subject
General Chemistry,Catalysis,Organic Chemistry