Molecular Conformation‐Dependent Mechanoluminescence: Same Mechanical Stimulus but Different Emissive Color over Time

Yang, Jie; Qin, Jianwen; Geng, Peiyao; Wang, Jiaqiang; Fang, Manman; Li, Zhen

doi:10.1002/ange.201809463

Cited by 43 publications

(13 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Li et al recently demonstrated the dynamic TL color change of phenothiazine/4-fluorobenzophenone integrated molecule under the continuous mechanical stimulus, which was reasoned by the changed molecular conformation and corresponding PL behavior. 10 However, describing TL with general photophysical parameters such as emission efficiency and decay lifetimes is still quite rare and challenging due to the ambiguous aspects of fracture generation and applied force.…”

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Lifetimes of Lanthanide(III) Triboluminescence Excited by Aerodynamic Shock Waves

et al. 2019

View full text Add to dashboard Cite

Triboluminescence (TL) has been known since the 17th century and is observed in various solid-state materials, but the fundamental mechanisms have still not been elucidated due to the limited access to quantitative photophysical information compared to that for photoluminescence (PL). With the aim of determining the difference between TL and PL using general photophysical parameters, we used aerodynamic shock waves as pulsed mechanical forces to estimate the TL lifetimes (τ TL ) of lanthanide(III) coordination polymers [Ln(hfa) 3 (dpf)] n (Ln = Eu, Tb, or mixture thereof; hfa = hexafluoroacetylacetonate; dpf = 2,5-bis(diphenylphosphoryl)furan). Interestingly, the Tb(III)-centered τ TL of Tb(III)/Eu(III) mixed compounds showed a slight difference from that of a Tb(III) pure compound, being in agreement with a previous observation that the green emission from Tb(III) ions was more dominant in TL than in PL. The results strongly indicated that Tb(III)-to-Eu(III) excited energy transfer was reduced under the condition of grinding.

show abstract

Section: ■ Introductionmentioning

confidence: 99%

“…10.1021/acs.jpcc.9b08349. Synthetic methods; detailed shock-tube setup; powder XRD patterns and emission spectra before/after experiments; shock wave theory; PL peak intensity and spectral ratio under air/nitrogen; temperature in the pressure chamber; TL/PL lifetimes under atmospheric/ decompressed conditions (PDF)…”

mentioning

confidence: 99%

Lifetimes of Lanthanide(III) Triboluminescence Excited by Aerodynamic Shock Waves

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The emission properties that depend on the molecular conformation often change the emission colour upon mechanical stimulation. 32,34,45,46 The application of molecules showing such stimulation-induced phenomena to white light-emitting devices will naturally be limited. Therefore, a promising approach would be to make molecules with no remarkable colour change even under stimulation.…”

Section: Photophysical Propertiesmentioning

confidence: 99%

White light emission generated by two stacking patterns of a single organic molecular crystal

et al. 2022

View full text Add to dashboard Cite

show abstract

“…2017 年, Li 等 [56] 报道了首例同时具备 [57] 还报道了颜色可变的 ML 分子 FCOCzS, 在连续的机械刺激下, 其动态机械发光从蓝色到白色再到黄色, 这种独特的动态 ML 效应可归因于机械刺激下分子构象的改变. 分子间较强的相互作用限制晶体在机械刺激下的坍塌和滑移, 并使其具有良好的机械稳定性.…”

Section: 分子排列对力致发光的影响unclassified

Significant Influence of Molecular Packing in Aggregates on Optoelectronic Properties

Wang¹,

Li²

2021

Acta Chimica Sinica

Self Cite

View full text Add to dashboard Cite

Organic materials based on small molecules are aggregates that composed of many molecules. Their properties are not only determined by the spatial configuration and electronic properties of individual molecule, but also closely related to the molecular packing modes and the intermolecular interactions in the aggregates. In the realm of organic molecules, the macroscopic performance of molecular aggregates is not just the simple superposition of single molecules, but often display overall differential response of aggregates, namely, distinct properties can be created by molecular uniting with particular packing modes. Therefore, molecular aggregation science has gradually appeared in scientific research and drawn much attention in recent years. With the continuous and serious exploration of molecular aggregation science, especially the in-depth study of the molecular packing modes and intermolecular interactions of organic molecules in the solid state, it is found that the luminescence based on aggregation state is completely different from the characteristics of individual molecule, including the emission intensity and color, emission type, and even the excitation process, which could be realized by regulating molecular aggregation behavior. In addition, the morphology and dimensions of the aggregates can also be adjusted to achieve excellent performances of optoelectronic devices. This review will introduce the important influence of the arrangement of aggregated molecules on mechanochromism, room temperature phosphorescence, mechanoluminescence and organic field effect transistors, and further elaborate the importance of the molecular packing, providing some guidance for regulating molecular packing mode and targeted design and development of high-performance optoelectronic materials.

show abstract

Molecular Conformation‐Dependent Mechanoluminescence: Same Mechanical Stimulus but Different Emissive Color over Time

Cited by 43 publications

References 45 publications

Lifetimes of Lanthanide(III) Triboluminescence Excited by Aerodynamic Shock Waves

Lifetimes of Lanthanide(III) Triboluminescence Excited by Aerodynamic Shock Waves

White light emission generated by two stacking patterns of a single organic molecular crystal

Significant Influence of Molecular Packing in Aggregates on Optoelectronic Properties

Contact Info

Product

Resources

About