Affiliation:
1. Tianjin Key Laboratory of Molecular Optoelectronic Sciences Institute of Molecular Aggregation Science Tianjin University Tianjin 30072 P. R. China
2. Shenzhen Institute of Molecular Aggregate Science and Engineering School of Science and Engineering The Chinese University of Hong Kong Shenzhen Guangdong 518172 P. R. China
3. Department of Chemistry Wuhan University Wuhan 430072 P. R. China
4. Joint School of National University of Singapore Tianjin University International Campus of Tianjin University Binhai New City Fuzhou 350207 P. R. China
5. Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 P. R. China
Abstract
AbstractIn recent years, organic room‐temperature phosphorescence (RTP) has been widely investigated owing to its fascinating afterglow characteristics. Consequently, it has been applied in anti‐counterfeiting and information security. However, these applications are limited by cost, substrates, and technological processes. Hence, a simple and environmentally friendly adsorption‐induced RTP system containing sulfonic acid groups is designed for convenient and efficient application. A pure organic compound of (1,1″‐biphenyl)‐4,4″‐disulfonic acid can be easily ionized and dispersed in water. When it is adsorbed on different types of paper and cloth substrates rich in hydroxyl groups, bright RTP emissions with maximum lifetimes of ≈1.1 s are achieved after drying the substrates. The destructive effect of H2O on the intermolecular hydrogen bonds between the phosphor and substrates makes the RTP emissions responsive to the stimuli of water and heat. Furthermore, a white afterglow is realized after doping with Rhodamine B for energy transfer. On the account of the adsorption‐induced RTP effect, four economical applications are demonstrated, wherein one dollar's worth of the phosphor can be used for anti‐counterfeiting 7692 banknotes, printing and dyeing 1538 graphs on cloth, making 196 Chinese knots, and producing 385 writes of encryption information, promoting the further development and commercialization of RTP materials.
Funder
National Natural Science Foundation of China
Subject
Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Cited by
4 articles.
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