Heteroepitaxial Growth of Multiblock Ln‐MOF Microrods for Photonic Barcodes

Yao, Yinan; Gao, Zhenhua; Lv, Yuanchao; Lin, Xianqing; Liu, Yingying; Du, Yonggang; Hu, Fengqin; Zhao, Yong Sheng

doi:10.1002/ange.201907433

Cited by 30 publications

(10 citation statements)

References 47 publications

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“…For example, part of all consumer goods, medicines and medical products, and even electronic components in military systems are counterfeits, which has a tremendous impact on our daily lives. Thus, anticounterfeiting technologies have found widespread applications in banknotes, diplomas, certificates, jewelry, medicines, and electronics [1][2][3][4][5][6][7] . Various graphically encoded taggants based on stimuli-responsive molecules have been developed to impede duplication because of their high coding capacity [8][9][10][11][12][13][14][15][16][17][18][19] .…”

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confidence: 99%

Dynamic wrinkling pattern exhibiting tunable fluorescence for anticounterfeiting applications

et al. 2020

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A dynamic surface pattern with a topography and fluorescence in response to environmental stimulus can enable information recording, hiding, and reading. Such patterns are therefore widely used in information security and anticounterfeiting. Here, we demonstrate a dynamic dual pattern using a supramolecular network comprising a copolymer containing pyridine (P4VP-nBA-S) and hydroxyl distyrylpyridine (DSP-OH) as the skin layer for bilayer wrinkling systems, in which both the wrinkle morphology and fluorescence color can be simultaneously regulated by visible light-triggered isomerization of DSP-OH, or acids. Acid-induced protonation of pyridines can dynamically regulate the cross-linking of the skin layer through hydrogen bonding, and the fluorescence of DSP-OH. On selective irradiation with 450 nm visible light or acid treatment, the resulting hierarchical patterned surface becomes smooth and wrinkled reversibly, and simultaneously its fluorescence changes dynamically from blue to orange-red. The smart surfaces with dynamic hierarchical wrinkles and fluorescence can find potential application in anticounterfeiting.

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confidence: 99%

Dynamic wrinkling pattern exhibiting tunable fluorescence for anticounterfeiting applications

et al. 2020

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“…After Y-R-Y is generated, the remaining CB [8] Stepwise assembly by adding dormant building blocks in sequence is a widely used method to prepare supramolecular block copolymers, multiblock fibers or multiblock fluorescent rods after a nucleation-elongation growth process. [90][91][92] Now we have successfully fabricated 3-block, 5-block and 7-block fluorescent microcolumns through one-pot living assembly, we also want to fabricate multiblock fluorescent microcolumns through conventional stepwise living assembly as to prove the versatility of this assembly system.…”

Section: One-pot Multiblock Living Assemblymentioning

confidence: 99%

Hierarchical living assembly: fabrication and visualization of multiblock microstructures

Shi

Zhang

Liu

et al. 2021

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Nature possesses a powerful ability to assemble multiple complex structures to fabricate hierarchical biological structures in a living-assembled way. However, it is still a huge challenge for artificial systems to fabricate and characterize hierarchical living assemblies with well-defined and controllable but complex structures. In this work, we proposed a new concept for the fabrication of multiblock fluorescent microcolumns, which relies on the cooperation between the controllable host–guest complexation based on cucurbit[8]uril (CB[8]) and the living assembly of nanotubular supramolecular polymers composed of CB[8] and NaBr in aqueous solution. By using the complexation of CB[8] with different guest numbers of luminogens with aggregation-induced emission (AIEgens) characteristics, and the difference in affinity between CB[8] and different types of AIEgens, the concentration-controlled and self-sorting-controlled sequential living assembly are realized, respectively. Correspondingly, multiblock fluorescent microcolumns with different fluorescence emission are fabricated, and the molecular structure of each fluorescent block is analyzed by single crystal X-ray diffraction measurement. In addition, the living assembly of multiblock fluorescent microcolumns is visualized, understood, and regulated with the aid of AIEgens. The method developed here is expected to be extended to more guest molecules of CB[8] and also provides a referential crystallization method for CB[8]-based complexes.

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“…The aim was fulfilled by Zhao and co-workers. 42 They developed a strategy to design microscale barcodes with high coding capacity through integrating the spectroscopic and graphical encoding in 1D lanthanide metal-organic framework (Ln-MOF) multiblock heterostructures, which were fabricated via a facile stepwise solvothermal synthesis (Fig. 8a).…”

Section: Integration Of Spectroscopic and Graphical Encodingmentioning

confidence: 99%