Visualization of the self-healing process by directly observing the evolution of fluorescence intensity

Shen, Qiaoqiao; Liu, Hui; Peng, Yan; Zheng, Jian; Wu, Jinrong

doi:10.1039/d0py01476a

Cited by 22 publications

(23 citation statements)

References 41 publications

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“…These results indicate that pyrene-containing NBN-doped PAHs exhibits aromaticity-dependent luminescence, and the difference in luminescence derives from the significant differences in aromaticity mentioned above. Meanwhile, Py-NBN-Ph is weakly emissive at a solid state due to the aggregation-caused quenching (ACQ) effect, as shown in Figure S6 [ 52 , 53 ]. Interestingly, it exhibited grinding enhanced emission behavior.…”

Section: Resultsmentioning

confidence: 99%

Unpredicted Concentration-Dependent Sensory Properties of Pyrene-Containing NBN-Doped Polycyclic Aromatic Hydrocarbons

Xiao

Sun

et al. 2022

Molecules

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Pyrene molecules containing NBN-doped polycyclic aromatic hydrocarbons (PAHs) have been synthesized by a simple and efficient intermolecular dehydration reaction between 1-pyrenylboronic acid and aromatic diamine. Pyrene-B (o-phenylenediamine) with a five-membered NBN ring and pyrene-B (1,8-diaminonaphthalene) with a six-membered NBN ring show differing luminescence. Pyrene-B (o-phenylenediamine) shows concentration-dependent luminescence and enhanced emission after grinding at solid state. Pyrene-B (1,8-diaminonaphthalene) exhibits a turn-on type luminescence upon fluoride ion addition at lower concentration, as well as concentration-dependent stability. Further potential applications of Pyrene-B (o-phenylenediamine) on artificial light-harvesting film were demonstrated by using commercial NiR dye as acceptor.

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Section: Resultsmentioning

confidence: 99%

Unpredicted Concentration-Dependent Sensory Properties of Pyrene-Containing NBN-Doped Polycyclic Aromatic Hydrocarbons

Xiao

Sun

et al. 2022

Molecules

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“…The presented strategy with precise organization of different components provides valuable inspiration for the structure design of multistage responsive materials, while the excellent mechanical properties benefit the long‐term service of the devices. [ 43,44 ]…”

Section: Resultsmentioning

confidence: 99%

Multistage Responsive Materials for Real‐time, Reversible, and Sustainable Light‐Writing

Liu

Guo

Zhang

et al. 2021

Adv Funct Materials

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Stimulus-responsive materials with designable integrated functions bridge the intelligent systems in future lifestyles with the Internet of Things (IoT). The growing trend for IoT and corresponding advanced devices will involve a great number of electronic disposables, which may place heavy burdens on the environment. Here, an elaborately designed multistage responsive material is reported for real-time, reversible light-writing based on organized stage-by-stage responsive behaviors and polarity-dependent physicochemical fluorescence response, where the stimulus is accurately delivered through a completely reversible "light-heat-fluorescence" pathway. The resulted materials can be pollution-freely written by hand-controlled near-infrared laser within 5 s, spontaneously erased within 20 s, and exhibit excellent re-writing ability (more than 5000 times while the variance of chromaticity coordinates <0.0008), which is difficult to achieve by traditional laser writing technologies. This study is a step toward high-performance long-life functional devices based on reversible multistage responsive materials for future IoT lifestyles.

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“…In addition to the development of self-healing polymers, understanding the multilevel structural evolution during the self-healing process is also crucial. To evaluate the self-healing process, optical microscopy [24], atomic force microscopy [21], super depth of field three-dimensional microscopy [25], scanning electron microscopy [26] and confocal laser scanning microscopy [27] are usually used to monitor the closure of scratches. These microscopy methods can provide quantitative and visualizable information for the healing process.…”

Section: Introductionmentioning

confidence: 99%

A fast-healing and high-performance metallosupramolecular elastomer based on pyridine-Cu coordination

et al. 2022

Self Cite

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Elastomers easily undergo a catastrophic failure as soon as a crack is introduced by mechanical damage. Thus, it is extremely important for elastomers to possess fast healing ability, which enables the quick reparation of cracks. However, developing elastomers with fast self-healing ability and high mechanical strength is highly challenging. Herein, we fabricate a metallosupramolecular elastomer by facilely introducing pyridine-Cu coordination into a copolymer of ethyl acrylate and vinyl pyridine. Interestingly, the pyridine-Cu coordination has a strong photothermal effect, which readily increases the sample temperature to 60°C in 30 s under near-infrared light. At this temperature, the sticky reptation modes are activated and thus serve as the driving force for network reorganization and fast self-healing of the metallosupramolecular elastomer. Albeit with a tensile strength of 10 MPa, the scratched and completely fractured samples can be healed within 2 min and 3 h, respectively. Moreover, during the damage and healing processes, the break and reformation of the coordination bonds can be tracked through laser confocal micro-Raman spectroscopy. This provides a microscopic methodology to monitor the bond-level healing kinetics of metallosupramolecular polymers.

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Visualization of the self-healing process by directly observing the evolution of fluorescence intensity

Abstract: Self-healing is a process that the non-equilibrium state caused by mechanical damage gradually evolves toward the equilibrium state. However, tracking this process is highly challenging. Here, we copolymerize a fluorophore...

Cited by 22 publications

References 41 publications

Unpredicted Concentration-Dependent Sensory Properties of Pyrene-Containing NBN-Doped Polycyclic Aromatic Hydrocarbons

Unpredicted Concentration-Dependent Sensory Properties of Pyrene-Containing NBN-Doped Polycyclic Aromatic Hydrocarbons

Multistage Responsive Materials for Real‐time, Reversible, and Sustainable Light‐Writing

A fast-healing and high-performance metallosupramolecular elastomer based on pyridine-Cu coordination

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