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Controlling molecular assembly on time scale:Time-dependent multicolor fluorescence for information encryption

Chinese Chemical Letters 2024年第7期35卷 336-340页

作者： Zixi Zou Jingyuan Wang Yian Sun Qian Wang Da-Hui Qu Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

Dynamic assembly on time scale is common in biological systems but rare for artificial materials,especially for smart luminescent *** molecular assembly in a spatio-temporal manner and resulting in white-light-including multicolor fluorescence with time-dynamic features remains ***,controlling molecular assembly on time scale is achieved by integrating a pH-responsive motif to a transient alkaline solution which is fabricated by activators(NaOH)and deactivators(esters),leading to automatic assembly on time scale and time-dependent multicolor fluorescence changing from blue to white and *** kinetics of the assembly process is dependent on the ester hydrolysis process,which can be controlled by varying ester concentrations,temperature,initial pH,stirring rate and ester *** dynamic fluorescent system can be further developed for intelligent fluorescent materials such as fluorescent ink,three-dimension(3D)codes and even four-dimension(4D)codes,exhibiting a promising potential for information encryption.

关键词： Supramolecular chemistry multicolor fluorescence White light emission Time-dependent fluorescence Information encryption

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Hydrogels with UCST behavior and UV/temperature-induced multicolor fluorescence for synergistic coding and encryption

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Science China Materials 2024年第11期67卷 3710-3718页

作者： Chuan Liu Kangan Hao Runhao Yu Rong Li Anrong Huang Chong Wu Kai Zheng Yinye Yang Xiaoling Zuo College of Physics and Mechatronic Engineering Guizhou Minzu UniversityGuiyang 550025China College of Materials Science and Engineering Guizhou Minzu UniversityGuiyang 550025China National Engineering Research Center for Compounding and Modification of Polymeric Materials Guiyang 550014China School of Materials and Energy Engineering Guizhou Institute of TechnologyGuiyang 550003China College of Pharmacy Guizhou University of Traditional Chinese MedicineGuiyang 550025China

The development of hydrogels capable of emitting multicolor fluorescence presents a promising avenue for addressing concerns related to information leakage and distortion of sensitive *** integration of multifactorinduced tunable fluorescence with a unique upper critical solution temperature(UCST)behavior in hydrogels significantly contributes to the development of multi-dimensional and multi-level information storage materials that can dynamically display information as well as offer a high level of security and protection for ***,the fusion of these advantageous properties into hydrogels intended for information storage and display remains a considerable *** this context,we introduce a novel three-dimensional(3D)fluorescent code-producing hydrogel array fabricated via vat photopolymerization(VP)3D printing,a technique offers a sustainable and efficient *** array unites the desired properties,capable of sequentially revealing concealed information through two distinct steps:(i)a heat-induced phase transition,and(ii)multicolor fluorescence triggered by ultraviolet(UV)/temperature exposure under specific conditions(i.e.,certain UV irradiation duration,heating time,and wavelength).The reversible transparency and reprogrammable fluorescence emission properties of these hydrogels are expected to significantly enhance the processes of information encryption and *** advancement could potentially revolutionize the field of information security.

关键词： fluorescent hydrogels multicolor fluorescence UCST effects information encryption 3D printing

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Lanthanide coordinated multicolor fluorescent polymeric hydrogels for bio-inspired shape/color switchable actuation through local diffusion of Tb^(3+)/Eu^(3+)ions

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Chinese Chemical Letters 2023年第5期34卷 637-640页

作者： Ruijia Wang Wei Lu Yi Zhang Wanning Li Wenqin Wang Tao Chen Faculty of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingbo 315201China

Lanthanide coordinated multicolor fluorescent polymeric hydrogels(MFPHs)are quite promising for various applications because of their sharp fluorescence bands and high color ***,few attempts have been carried out to locally regulate their fluorescence switching or shape deforming behaviors,but such studies are very useful for patterned materials with disparate ***,the picolinate moieties that can sensitize Tb^(3+)/Eu^(3+)luminescence via antenna effect were chemically introduced into interpenetrating double networks to produce a robust kind of lanthanide coordinated *** varying the doping ratio of Tb^(3+)/Eu^(3+),fluorescence colors of the obtained hydrogels were continuously regulated from green to orange and then ***,spatial fluorescence color control within the hydrogel matrix could be facilely realized by controlled diffusion of Tb^(3+)/Eu^(3+)ions,producing a number of 2D hydrogel objects with local multicolor fluorescent ***,the differential swelling capacities between the fluorescent patterned and non-fluorescent parts led to interesting 2D-to-3D shape deformation to give well-defined multicolor fluorescent 3D hydrogel *** on these results,bio-inspired synergistic color/shape changeable actuators were *** present study provided a promising strategy to achieve the local fluorescence and shape control within lanthanide coordinated hydrogels,and is expected to be expanded for fabricating useful patterned materials with disparate functions.

关键词： multicolor fluorescence Polymeric hydrogel Lanthanide coordination Actuator Fluorescent patterns

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