Mechanical Effects of Elastic Crystals Driven by Natural Sunlight and Force

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(48)

Опубликована: Окт. 13, 2023

Abstract Flexible crystals that can capture solar energy and convert it into mechanical are promising for a wide range of applications such as information storage actuators, but obtaining them remains challenge. Herein, an elastic crystal barbiturate derivative was found to be excellent candidate, demonstrating plastic bending behavior under natural sunlight irradiation. 1 H NMR high‐resolution mass spectrum data microcrystals before after light irradiation demonstrated light‐induced [2+2] cycloaddition the driving force photomechanical effects. Interestingly, retained even This is first report flexible driven by have both properties elasticity. Furthermore, regulation passive output direction transport objects applying forces demonstrated.

Язык: Английский

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Recent advances in tunable solid-state emission based on α-cyanodiarylethenes: from molecular packing regulation to functional development

Chemical Society Reviews, Год журнала: 2024, Номер 53(13), С. 6636 - 6653

Опубликована: Янв. 1, 2024

An overview of the design strategies and their applications tunable molecular solid-state emission based on customized packing α-cyanodiarylethenes (CAEs) by stimuli response as well utilization co-assembly.

Язык: Английский

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Acidichromic organic crystals with manifold mechanical deformations for reconfigurable flexible optical tuner

Wearable electronics., Год журнала: 2024, Номер 1, С. 111 - 118

Опубликована: Май 17, 2024

Acicular organic crystals with micro- or centimeter scale in length have been widely employed as media for transducing self-emitted inputted optical signals, i.e., active passive waveguides. Combining the emerging dynamic adaptability of waveguides, provides an unprecedented opportunity to development crystal-based flexible optoelectronics devices. Here, we report a Schiff base crystal that combines two unique features integrated elastic-bending, plastic-twisting, acid-bending deformations and protonation-induced acidichromism. The emission color single can be selectively reversibly regulated at different locations between green (554 nm) deep red (659 by protonic acid vapor fuming, producing various block heterojunction structures easily identified emission. In addition, reconfigured quickly repeated erasing-writing process based on reversible protonation-deprotonation. Making full use flexibilities, acidichromic waveguides properties crystals, crystalline tuner wide range output signals adjusted flexibly was further constructed. These results not only demonstrate reconfigurable designed using but also open prospects application lightweight, wearable electronic

Язык: Английский

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

Journal of Materials Chemistry C, Год журнала: 2024, Номер 12(7), С. 2515 - 2525

Опубликована: Янв. 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.

Язык: Английский

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2D Elastic Organic Crystals with Thermomechanical/Acid Responses and Dual‐Mode Optical Waveguides

Advanced Optical Materials, Год журнала: 2024, Номер 12(21)

Опубликована: Май 31, 2024

Abstract Achieving the combination of multiple external stimuli responses and mechanical flexibility has become current emerging research in field crystalline materials. Meanwhile, modulation its properties remains challenging. In this work, a 1‐[(E)‐[(6‐methyl‐1,3‐benzothiazol‐2‐yl) imino] methyl] naphthalen‐2‐ol (BNO) material is reported. The elasticity thermomechanical achieved by means polymorphism (form‐I form‐II). Further, structural basis 2D form‐I investigated. two types appearing are explored detail from perspective crystal structure thermodynamics, second response during cooling successfully predicted. Then, acid materials endowed molecular design, fluorescence switch realized through thermal treatments. Finally, active/passive dual‐mode optical waveguides explored.

Язык: Английский

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Giant Thermosalient Effect in a Molecular Single Crystal: Dynamic Transformations and Mechanistic Insights

Journal of the American Chemical Society, Год журнала: 2024, Номер unknown

Опубликована: Сен. 24, 2024

The exploration of mechanical motion in molecular crystals under external stimuli is great interest because its potential applications diverse fields, such as electronics, actuation, or sensing. Understanding the underlying processes, including phase transitions and structural changes, crucial for exploiting dynamic nature these crystals. Here, we present a novel organic compound,

Язык: Английский

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Multi-stimuli responsive behaviors in a new chiral hybrid nitroprusside salt (R-3-hydroxypyrrolidinium)2[Fe(CN)5(NO)]

Chinese Chemical Letters, Год журнала: 2024, Номер 35(12), С. 109507 - 109507

Опубликована: Янв. 14, 2024

Язык: Английский

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Photosalience and Thermal Phase Transitions of Azobenzene- and Crown Ether-Based Complexes in Polymorphic Crystals

Journal of the American Chemical Society, Год журнала: 2023, Номер 145(39), С. 21378 - 21386

Опубликована: Сен. 21, 2023

Stimuli-responsive molecular crystals have attracted considerable attention as promising smart materials with applications in various fields such sensing, actuation, and optoelectronics. Understanding the structure–mechanical property relationships, however, remains largely unexplored when it comes to functionalizing these organic crystals. Here, we report three polymorphic (Forms A, B, C) formed by non-threaded complexation of a dibenzo[18]crown-6 (DB18C6) ether ring an azobenzene-based ammonium cation, each exhibiting distinct thermal phase transitions, photoinduced deformations, mechanical behavior. Structural changes on going from Form A B C during heating cooling, respectively, are observed single-crystal X-ray crystallography. shows reversible bending, whereas exhibits isotropic expansion. displays uniaxial negative expansion remarkable increase 44% thickness under photoirradiation. Force measurements nanoindentation reveal that soft low elastic modulus demonstrate significant photoresponse, attributed structure, which permits flexibility azobenzene unit. This work represents advance understanding correlation between structure–thermomechanical structure–photomechanical properties necessary for development multi-stimulus-responsive tailored properties.

Язык: Английский

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Flexible Organic Crystalline Fibers and Loops with Strong Second Harmonic Generation

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Март 20, 2025

Flexible organic crystals represent a novel class of smart materials that open many opportunities for optical applications. While it has been established elastic or plastic deformation slender molecular can be commonly induced by external intervention, grow in bent curled shapes naturally are rarely reported. This study introduces an extraordinarily flexible crystalline fibrous material, (Z)-3-(2,3-dichloropyridin-4-yl)-2-(3,5-dimethylphenyl)acrylonitrile (DPA), crystallizes both as straight and crystals. Crystals DPA easily obtained from solution either long fibers to various extent, sometimes even closed into loop. The mechanically applying force photochemically exposure ultraviolet light. polar capable highly efficient second harmonic generation (SHG) with respective intensities 2.03 ± 0.15 1.52 0.12 times (equivalent strain ≈ 1%) urea. Curling during crystal growth provides direct access curved SHG-active waveguiding elements, such ring resonators, thereby circumventing the necessity manual bending, which is usually not readily scalable. work highlights unconventional properties capabilities bring global space their potential applications shape-conforming, nonlinear materials.

Язык: Английский

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Highly Sensitive Wearable Chromic Force Sensor Utilizing In-Plane Anisotropy in Polydiacetylene Mechanochromism

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Апрель 24, 2025

Force sensitivity is a crucial parameter in mechanochromic materials, determining their application range and practical success. In this study, we reveal an unexplored degree of freedom─in-plane anisotropy─for significantly enhancing the force polydiacetylene. Utilizing our newly developed dual nanofriction force/fluorescence microscopy setup, discovered that reaches its peak when external forces are applied perpendicular to polymer backbones in-plane. This phenomenon explained by "domino effect", where point loads propagate along affect structure even hundreds nanometers from contact point. Leveraging finding, highly sensitive, stretchable sensor demonstrated aligning polydiacetylene crystals direction increased sensor's up 14-fold.

Язык: Английский

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