Volume 58, Issue 49 pp. 17814-17819
Research Article

Multiple Anti-Counterfeiting Guarantees from a Simple Tetraphenylethylene Derivative – High-Contrasted and Multi-State Mechanochromism and Photochromism

Dr. Guangxi Huang

Dr. Guangxi Huang

Key Laboratory of New Lithium-Ion Battery and Mesoporous Material, College of Chemistry and Environmental Engineering, Shenzhen University, 1066 Xueyuan Avenue, Nanshan, Shenzhen, 518055 China

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Qing Xia

Qing Xia

Key Laboratory of New Lithium-Ion Battery and Mesoporous Material, College of Chemistry and Environmental Engineering, Shenzhen University, 1066 Xueyuan Avenue, Nanshan, Shenzhen, 518055 China

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Wenbin Huang

Wenbin Huang

School of Science, Harbin Institute of Technology, Shenzhen, HIT Campus of University Town, Shenzhen, 518055 China

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Jianwu Tian

Jianwu Tian

Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun North First Street 2, Beijing, 100190 China

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Prof. Zikai He

Prof. Zikai He

School of Science, Harbin Institute of Technology, Shenzhen, HIT Campus of University Town, Shenzhen, 518055 China

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Prof. Bing Shi Li

Corresponding Author

Prof. Bing Shi Li

Key Laboratory of New Lithium-Ion Battery and Mesoporous Material, College of Chemistry and Environmental Engineering, Shenzhen University, 1066 Xueyuan Avenue, Nanshan, Shenzhen, 518055 China

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Prof. Ben Zhong Tang

Corresponding Author

Prof. Ben Zhong Tang

Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research, Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China

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First published: 27 September 2019
Citations: 272

Graphical Abstract

Forgery-proof: A novel AIE molecule 1 is designed with high-contrasted and multi-state mechanochromic and photochromic properties. Based on these properties, 1 shows great potential for application in advanced multidimensional anti-counterfeiting, which was demonstrated by fabrication of a model banknote.

Abstract

Herein the novel tetraphenylethylene (TPE) derivative 1 was designed with an integration of aggregation-induced emission (AIE), multi-state mechanochromism and self-recovery photochromism. The molecule was susceptible to grinding, heating and vapor fuming and showed corresponding transition of its emission colors. The heated powder or single crystal of 1 exhibited reversible photochromism. After a short period of UV irradiation, it showed a bright red color, but recovered to its original white appearance within 1 min. The photochromism is due to the formation of photocyclization intermediates upon UV irradiation, while the eversible mechanochromism is attributed to the weak molecular interactions derived from head-to-tail stacking of the molecules. This reversible multi-state, high-contrasted and rapid responsive mechanochromic and photochromic property cooperatively provide double enhancement of a multimode guarantee in advanced anti-counterfeiting.

Conflict of interest

The authors declare no conflict of interest.

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