10.1021/acsami.8b06901.s001 Yong-Mei Wang Yong-Mei Wang Xue-Tao Tian Xue-Tao Tian Hui Zhang Hui Zhang Zhong-Rui Yang Zhong-Rui Yang Xue-Bo Yin Xue-Bo Yin Anticounterfeiting Quick Response Code with Emission Color of Invisible Metal–Organic Frameworks as Encoding Information American Chemical Society 2018 anticounterfeiting encoding strategy Encoding Information Counterfeiting information storage unit RGB trichromatic NMOFs inks Anticounterfeiting Quick Response Code excitation QR codes pattern UV light-emitting boxes emission colors 2018-06-08 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Anticounterfeiting_Quick_Response_Code_with_Emission_Color_of_Invisible_Metal_Organic_Frameworks_as_Encoding_Information/6635537 Counterfeiting is a global epidemic that is compelling the development of new anticounterfeiting strategy. Herein, we report a novel multiple anticounterfeiting encoding strategy of invisible fluorescent quick response (QR) codes with emission color as information storage unit. The strategy requires red, green, and blue (RGB) light-emitting materials for different emission colors as encrypting information, single excitation for all of the emission for practicability, and ultraviolet (UV) excitation for invisibility under daylight. Therefore, RGB light-emitting nanoscale metal–organic frameworks (NMOFs) are designed as inks to construct the colorful light-emitting boxes for information encrypting, while three black vertex boxes were used for positioning. Full-color emissions are obtained by mixing the trichromatic NMOFs inks through inkjet printer. The encrypting information capacity is easily adjusted by the number of light-emitting boxes with the infinite emission colors. The information is decoded with specific excitation light at 275 nm, making the QR codes invisible under daylight. The composition of inks, invisibility, inkjet printing, and the abundant encrypting information all contribute to multiple anticounterfeiting. The proposed QR codes pattern holds great potential for advanced anticounterfeiting.