Elastic Photomechanical Organic Single Crystals with Dual Photoswitch Units for an Extended Absorption Band

IF 3.4 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Crystal Growth & Design Pub Date : 2024-10-01 DOI:10.1021/acs.cgd.4c0111110.1021/acs.cgd.4c01111

Yiwei Wei, Shanshan Zhu, Kui Chen, Wenbo Wu, Yang Ye, Xin Huang, Na Wang*, Lina Zhou, Ting Wang* and Hongxun Hao,

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Abstract

Molecular crystals that can generate mechanical motion in response to external light are promising candidates for photoactuators, which are expected to have applications in microrobotics, artificial muscles, smart switches, microfluidic systems, oscillators, etc. However, most of the molecular crystals are brittle, which leads to poor processability and easy failure during use. Furthermore, most of the crystals are actuated by UV light, which may be harmful to human health. Here, we successfully synthesized an elastically flexible crystal that can undergo Z/E isomerization to achieve backlight bending under visible light irradiation. The origin of elastic flexibility was explored by analyzing the packing structure and intermolecular interactions. The photochemical reaction routine was confirmed by analysis of single-crystal structure, ¹H NMR and FTIR spectra. The results presented in this work may provide a way to design flexible crystals that can be actuated by visible light and facilitate the application of photoswitch molecules.

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具有双光电开关单元的弹性光机械有机单晶体可扩展吸收带

能对外部光线产生机械运动的分子晶体是光致动器的理想候选材料，有望应用于微型机器人、人造肌肉、智能开关、微流控系统、振荡器等领域。然而，大多数分子晶体都比较脆，导致加工性差，在使用过程中容易失效。此外，大多数晶体是由紫外线驱动的，可能对人体健康有害。在这里，我们成功合成了一种弹性柔性晶体，它可以进行 Z/E 异构化，在可见光照射下实现背光弯曲。通过分析填料结构和分子间相互作用，我们探索了弹性柔性的来源。通过分析单晶结构、1H NMR 和傅立叶变换红外光谱，证实了光化学反应过程。这项研究成果为设计可由可见光驱动的柔性晶体提供了一种方法，并促进了光开关分子的应用。

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来源期刊

Crystal Growth & Design 化学-材料科学：综合

CiteScore

6.30

自引率

10.50%

发文量

650

审稿时长

1.9 months

期刊介绍： The aim of Crystal Growth & Design is to stimulate crossfertilization of knowledge among scientists and engineers working in the fields of crystal growth, crystal engineering, and the industrial application of crystalline materials. Crystal Growth & Design publishes theoretical and experimental studies of the physical, chemical, and biological phenomena and processes related to the design, growth, and application of crystalline materials. Synergistic approaches originating from different disciplines and technologies and integrating the fields of crystal growth, crystal engineering, intermolecular interactions, and industrial application are encouraged.