Multiplexed stimuli-responsive molecules for high-security anti-counterfeiting applications

Xia, Hongyan; Loan, Tommy; Santra, Mithun; Xie, Kang; Bradley, Mark

doi:10.1039/d2tc05404c

Cited by 5 publications

(2 citation statements)

References 68 publications

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“…1,2 Macroscopic effects of dynamic crystals can be expressed as mechanical motions under external stimuli including light, force, heat, electricity, and chemical agents. 3,4 As one of the important dynamic crystals, photo-driven dynamic crystals have presented many conspicuous advantages such as remotely controllable manipulation, noncontact stimulus, safety, and convenience of the light source. 5,6 In addition, densely ordered molecular packing in the crystal lattice endows them with fast response speed, efficient energy transfer, and accurate motion properties.…”

Section: Introductionmentioning

confidence: 99%

“…Dynamic crystals have become a research forefront due to their potential applications in bionic robots, micromachines, smart actuators, and other smart devices. , Macroscopic effects of dynamic crystals can be expressed as mechanical motions under external stimuli including light, force, heat, electricity, and chemical agents. , As one of the important dynamic crystals, photo-driven dynamic crystals have presented many conspicuous advantages such as remotely controllable manipulation, noncontact stimulus, safety, and convenience of the light source. , In addition, densely ordered molecular packing in the crystal lattice endows them with fast response speed, efficient energy transfer, and accurate motion properties . However, unlike polymers, gels, and metals with innate flexibility, most organic crystals are brittle under external forces, which greatly restricts their applications in flexible smart materials .…”

Section: Introductionmentioning

confidence: 99%

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Designing Dynamic Crystals with Multiple Flexibilities through a Cocrystal Strategy for Flexible Photo-controlled Switches

Chen,

Wu,

Zhao

et al. 2023

Crystal Growth & Design

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Endowing function crystals with flexibility can further extend their applications in the field of flexible smart devices. Herein, a brittle, photo-driven dynamic crystal was successfully modified into flexible dynamic crystals through a cocrystal strategy. The fluorescence and photo-response properties of the crystals were simultaneously improved. More importantly, the cocrystals can exhibit rare multiple flexibilities, including 2D elastic bending and twistable deformation properties, which have not been reported before for cocrystals. The mechanisms of 2D elastic bending and twistable properties were investigated through detailed crystallographic analysis, experimental tests, and theoretical calculations. It was found that the 2D elastic bending can be attributed to strong π-stacked columns connecting weak molecular interactions and herringbone molecular arrangements in the cocrystals. The twistable deformation properties are closely related to the different orientations of intermolecular interactions and molecular rotation without spatial hindrance. Finally, taking advantage of the multiple flexibilities of the cocrystals, a flexible photo-controlled switch was designed and tested.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Designing Dynamic Crystals with Multiple Flexibilities through a Cocrystal Strategy for Flexible Photo-controlled Switches

Chen,

Wu,

Zhao

et al. 2023

Crystal Growth & Design

View full text Add to dashboard Cite

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Organic Mechanochromic Luminescent Materials with Self‐Recovering Characters

Nakamura,

Hirano,

Tohnai

2024

ChemPlusChem

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Recently, applied research on stimuli‐responsive materials with luminescence‐switching characteristics has been conducted in various fields. A representative phenomenon of stimuli‐responsive luminescent materials is mechanochromic luminescence (MCL), which exhibits luminescent color change induced by mechanical stimuli such as grinding. These materials are among the most prominent candidates for security and sensing applications. Interestingly, some mechanochromic luminescent materials have shown self‐recovery character, in which their original luminescent color can be recovered by just standing under ambient conditions after grinding. Although there are more and more reports of such materials in recent years, the fundamental principles of molecular design still remain elusive. In this concept, we summarize distinctive advances in mechanochromic luminescent materials with self‐recovery according to the core structures of luminescent molecules. Controlling amorphous state by introducing substituents such as alkyl or polar groups is effective method to provide self‐recovering properties.

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Naphthalene-embedded spiropyran derivative-A type of conjugated expanded material with solid-state photochromic properties and tunable color switching range

Liu,

Li,

Xie

et al. 2024

Journal of Molecular Structure

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Multiplexed stimuli-responsive molecules for high-security anti-counterfeiting applications

Abstract: In the context of society’s increasing reliance on information, improving the level of data security is a key task but also a formidable challenge. As such it is necessary and...

Cited by 5 publications

References 68 publications

Designing Dynamic Crystals with Multiple Flexibilities through a Cocrystal Strategy for Flexible Photo-controlled Switches

Designing Dynamic Crystals with Multiple Flexibilities through a Cocrystal Strategy for Flexible Photo-controlled Switches

Organic Mechanochromic Luminescent Materials with Self‐Recovering Characters

Naphthalene-embedded spiropyran derivative-A type of conjugated expanded material with solid-state photochromic properties and tunable color switching range

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