Stimuli‐Responsive Deep‐Blue Organic Ultralong Phosphorescence with Lifetime over 5 s for Reversible Water‐Jet Anti‐Counterfeiting Printing

Zhang, Jingyu; Shen, Xu; Wang, Zijie; Xue, Ping; Wang, Wuji; Zhang, Longyan; Shi, Yuqi; Huang, Wei; Chen, Runfeng

doi:10.1002/ange.202104361

Cited by 23 publications

(2 citation statements)

References 49 publications

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“…Those hydrogen bonds can efficiently suppress the process of non-radiative decay of Dy 3+ ions in the polymer network after excitation by ultraviolet irradiation, resulting in an extension of the fluorescence lifetime. 32 When the imprinted cavities are occupied by MC and/or PC during rebinding, a host–guest inclusion structured complex is formed and the fluorescence intensities produced by the Dy 3+ -directed self-assembly system increased as the concentration of those pesticides is increased. Therefore, FRET between hosts and guests is considered to be responsible for the fluorescence enhancement of DMIPs.…”

Section: Resultsmentioning

confidence: 99%

Dy(iii)-coordination imprinted self-assembly microspheres based on a silica core for highly sensitive and selective detection of two carbamate pesticides

2022

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Section: Resultsmentioning

confidence: 99%

Dy(iii)-coordination imprinted self-assembly microspheres based on a silica core for highly sensitive and selective detection of two carbamate pesticides

2022

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“…The intermolecular interaction (such as hydrogen bonding, ionic bonding, and π–π stacking, etc.) between host and guest can efficiently stabilize the triplet excitons and achieve efficient and persistent RTP of guest [27–32] . For example, Liu et at [33] .…”

Section: Figurementioning

confidence: 99%

Nearly Unity Quantum Yield Persistent Room‐Temperature Phosphorescence from Heavy Atom‐Free Rigid Inorganic/Organic Hybrid Frameworks

Zheng

Huang

et al. 2022

Angewandte Chemie

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Synergism between covalent and non-covalent bonds is employed to fix an organic phosphor guest in a rigid inorganic framework, simulating the stiffening effect seen in the glassy state and realizing efficient and ultralong roomtemperature phosphorescence (RTP). Twelve heavy-atom-free composites have been obtained through introducing arylboric or arylcarboxylic acid derivatives into the inorganic boric acid matrix by solid-phase synthesis. Owing to the stiffening effect of multiple bonds, all the composites show highly efficient and persistent RTP of guest molecules with a quantum yield ranging from 39.8 % to ca. 100 % and a lifetime up to 8.74 s, which results in a 55 s afterglow visible to the naked eye after exposure to a portable UV lamp. Interestingly, it is found that the substitution position and quantity of carboxyl in the guest have a great influence on the phosphorescent properties, and that the heavy-atom effect is invalid in such host-guest hybrid systems. The 100 g grade composite is easily prepared because of the solvent-free, green, and simple synthesis method. These results provide an important way for the development of RTP materials with ultrahigh quantum yield and ultralong lifetime, as well as their practical applications in the fields of anti-counterfeiting and information storage, among others.

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Programmable Encryption Patterns from Phosphorescent Polymers Via Laser Controlling Water‐Quenching Effect

Chen,

Yang,

Xiao

et al. 2024

Adv Funct Materials

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Organic room temperature phosphorescence (RTP) from polymers holds significant promise for information encryption and anti‐counterfeiting applications. However, conventional patterning techniques limit the development of advanced RTP encryption, highlighting the need for an efficient method that achieves encryption processes quickly and conveniently. In this study, the UV laser marking machine is applied to create traceless phosphorescent patterns by leveraging the photothermal effect of the laser and the water‐absorbent quenching RTP property of polyacrylamide. A series of biaryl derivative phosphors with low π‐electron numbers are designed to limit UV absorption to below 355 nm, thereby preventing polymer sintering by the UV laser (355 nm). Additionally, two phosphorescent polymers, PB2COOH (phosphorescence lifetime τP = 2.34 s; phosphorescence quantum yield ΦP = 13.59%) and PBN (τP = 1.46 s; ΦP = 20.33%), possessing relatively excellent phosphorescent properties, are obtained. The controllable program and non‐contact processing of the marking machine enable the rapid realization of complex patterns, such as the Twelve Chinese Zodiac Signs, effectively overcoming the constraints of traditional techniques. Based on this laser technology, applications such as dual‐locking QR (quick response) codes, misleading double QR codes, labeling, and other advanced encryption methods are developed.

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Stimuli‐Responsive Deep‐Blue Organic Ultralong Phosphorescence with Lifetime over 5 s for Reversible Water‐Jet Anti‐Counterfeiting Printing

Cited by 23 publications

References 49 publications

Dy(iii)-coordination imprinted self-assembly microspheres based on a silica core for highly sensitive and selective detection of two carbamate pesticides

Dy(iii)-coordination imprinted self-assembly microspheres based on a silica core for highly sensitive and selective detection of two carbamate pesticides

Nearly Unity Quantum Yield Persistent Room‐Temperature Phosphorescence from Heavy Atom‐Free Rigid Inorganic/Organic Hybrid Frameworks

Programmable Encryption Patterns from Phosphorescent Polymers Via Laser Controlling Water‐Quenching Effect

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