Stimuli-responsive flexible organic crystals

Journal of Materials Chemistry C, Journal Year: 2023, Volume and Issue: 11(6), P. 2026 - 2052

Published: Jan. 1, 2023

Stimuli-responsive flexible organic crystals are a new generation of smart devices aimed towards functionalization, integration, and intelligence.

Language: Английский

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Mechanoresponsive Flexible Crystals

JACS Au, Journal Year: 2024, Volume and Issue: 4(2), P. 279 - 300

Published: Jan. 16, 2024

Flexible crystals have gained significant attention owing to their remarkable pliability, plasticity, and adaptability, making them highly popular in various research application fields. The main challenges developing flexible lie the rational design, preparation, performance optimization of such crystals. Therefore, a comprehensive understanding fundamental origins crystal flexibility is crucial for establishing evaluation criteria design principles. This Perspective offers retrospective analysis development over past two decades. It summarizes elastic standards possible plastic bending mechanisms tailored diverse analyzes assessment theoretical basis applicability. Meanwhile, compatibility between elasticity plasticity has been discussed, unveiling immense prospects elastic/plastic applications biomedicine, electronic devices, optics. Furthermore, this presents state-of-the-art experimental avenues methods investigating molecular interactions crystals, which vital future exploration flexibility.

Language: Английский

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Multi‐Stimuli‐Induced Mechanical Bending and Reversible Fluorescence Switching in a Single Organic Crystal

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 61(1)

Published: Nov. 22, 2021

Fluorescent single crystals that respond to multiple external stimuli are of great interest in molecular machines, sensors, and displays. The integration photo- or acid-induced fluorescence enhancement bending one organic crystal, however, has not been reported yet. Herein, we report the interesting plastic photomechanical switching on an azine crystal a single-crystal transformation, due extended π-conjugation slippage. Moreover, fluorescent driven by volatile acid vapors was firstly observed, attributed synergistic effect push-pull electronic structure hydrogen bonding. also shows high elasticity under force. In addition, reversible can be triggered grinding solvent fuming, as well adsorption desorption HCl vapor. plastic, elastic switch-on into provides new strategy for next-generation smart materials.

Language: Английский

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Luminescent polymorphic crystals: mechanoresponsive and multicolor-emissive properties

CrystEngComm, Journal Year: 2022, Volume and Issue: 24(6), P. 1112 - 1126

Published: Jan. 1, 2022

Polymorphic organic crystals that can switch their photophysical properties in response to mechanical stimuli are highlighted.

Language: Английский

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An Elastic Organic Crystal Enables Macroscopic Photoinduced Crystal Elongation

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(11), P. 6024 - 6028

Published: Feb. 25, 2023

Among the various types of photomechanical deformations organic crystals, photoinduced elongation millimeter-scale crystals has yet to be demonstrated. Here we report that millimeter-sized crystalline rods an anthracene–pentiptycene hybrid π-system (1) are highly elastic and able elongate up 21.6% or 0.40 mm without fragmentation upon undergoing [4 + 4] photodimerization reactions. Both mechanical effects reveal a strong cohesion system, even at interface 1 its photodimer 2 under conditions randomized molecular packing, representing new class mechanically adaptive crystals.

Language: Английский

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Elasto-plastic behaviour with reversible thermosalient expansion in acrylonitrile-based organic crystals

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(7), P. 2515 - 2525

Published: Jan. 1, 2024

We synthesised a molecular crystal based on an acrylonitrile derivative, showcasing distinctive blend of elasticity, plasticity, and reversible thermal expansion, thereby resembling shape memory characteristics.

Language: Английский

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Smart molecular crystal switches

Smart Molecules, Journal Year: 2024, Volume and Issue: 2(1)

Published: Feb. 16, 2024

Abstract The multifaceted switches are part of our everyday life from the macroscopic to molecular world. A switch operating in solution and crystalline state is very different. In this review, we summarize state‐of‐the‐art smart crystal based on martensites. These respond external stimuli reversibly change between states, retaining their integrity. operation predominantly relies temperature alterations or mechanical stress, with emerging methods photothermal effects, photoisomerization, host‐guest chemistry. capability changing orientation interaction offers opportunities several applications, including actuators, shaping structural materials, optoelectronic magnetic as well switchable porous materials. Smart have vast potential modern scientific technological progress. ongoing research shapes a rich landscape for innovation future exploration across diverse disciplines.

Language: Английский

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Mechanical Twisting-Induced Enhancement of Second-Order Optical Nonlinearity in a Flexible Molecular Crystal

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 7, 2025

Flexible molecular crystals are essential for advancing smart materials, providing unique functionality and adaptability applications in next-generation electronics, pharmaceuticals, energy storage. However, the optical of flexible have been largely restricted to linear optics, with nonlinear (NLO) properties rarely explored. Herein, we report on application mechanical twisting second-order optics. The crystal formed through self-assembly model compound 9-anthraldehyde (AA) features an intrinsic chiral noncentrosymmetric structure, demonstrating high efficiency second harmonic generation (SHG) NLO circular dichroism, which could be greatly enhanced by macroscopic twisting. anisotropic stacking imparts AA flexibility combined elastic bending plastic isochiral enhance SHG intensities order magnitude depending their M- or P-configuration. Meanwhile, dichroism factor gSHG-CD twisted is increased, achieving highest reported anisotropy among organic materials. These boosted performances intensity chiroptical response expected expand photonic crystals.

Language: Английский

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Mechanically Flexible and Optically Tunable Organic Crystal Resonator

Advanced Optical Materials, Journal Year: 2021, Volume and Issue: 10(2)

Published: Nov. 16, 2021

Abstract An organic single‐crystal optical resonator that maintains its performance even upon mechanical bending remains a challenging target. Here, the first flexible crystal (FOC) works as tunable function of angle is developed. A fluorescent π‐conjugated molecule, cyano‐substituted oligo(phenylenevinylene)s, allowed to crystallize slowly, yielding discrete rod‐shape microcrystal (FOC COPV ). FOC not only an efficient waveguide along longitudinal direction with loss coefficient 0.249 dB µm −1 but also Fabry‐Pérot type lateral direction. The resonance wavelength finely toward shorter region by plausibly due Poisson effect, namely, contraction dimension strain, change in refractive index. and associated spectral shift repeated for many cycles without deterioration their properties.

Language: Английский

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Atomic-resolved hierarchical structure of elastic π-conjugated molecular crystal for flexible organic photonics

Chem, Journal Year: 2022, Volume and Issue: 8(5), P. 1427 - 1441

Published: March 18, 2022

Language: Английский

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