Shimin Shao , Miao Bao , Ruohan Chen , Zhenghao Zhang , Haifeng Lu , Meng Wang , Hong Yang
{"title":"一种 Discotic Mesogenic 近红外吸收染料及其在光响应液晶弹性体中的应用","authors":"Shimin Shao , Miao Bao , Ruohan Chen , Zhenghao Zhang , Haifeng Lu , Meng Wang , Hong Yang","doi":"10.1016/j.giant.2024.100271","DOIUrl":null,"url":null,"abstract":"<div><p>Near-infrared (NIR) light-responsive liquid crystal elastomers (LCEs) doped with organic small-molecule photothermal agents have garnered scientific attention. However, the challenge remains in designing and synthesizing mesogenic photothermal dyes with absorption wavelengths greater than 800 nm. In this research, we design a novel discotic mesogenic NIR absorbing dye, namely the nickel bis(dithiolene) complex YHD868, and prepare NIR-responsive LCE/YHD868 composite films. The discotic mesogenic molecule YHD868 possesses a columnar hexagonal mesophase and exhibits intense NIR absorption at 868 nm, with a photothermal conversion efficiency of about 27 % and a molar extinction coefficient of approximately 30000 M<sup>−1</sup>·cm<sup>−1</sup>. Due to the strong NIR absorption of YHD868, combined with its excellent photothermal stability, the LCE/YHD868 composite films exhibit remarkable photoresponse and mechanical properties. Even at a low doping concentration of 0.2 wt%, the composite film can achieve a tensile strength of 9.8 MPa and an elongation at break of 165 %. Under 880 nm NIR irradiation (3.3 W·cm<sup>−2</sup>), the film can complete reversible photo-induced shrinking deformation in just 2 s, with a shrinkage ratio of about 64 %. This work offers a new approach for the development of photo-responsive smart soft materials.</p></div>","PeriodicalId":34151,"journal":{"name":"GIANT","volume":"18 ","pages":"Article 100271"},"PeriodicalIF":5.4000,"publicationDate":"2024-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666542524000365/pdfft?md5=328436d827e188b32fad7e281360e927&pid=1-s2.0-S2666542524000365-main.pdf","citationCount":"0","resultStr":"{\"title\":\"A Discotic Mesogenic near-infrared absorbing dye and its application in photo-responsive liquid crystal elastomers\",\"authors\":\"Shimin Shao , Miao Bao , Ruohan Chen , Zhenghao Zhang , Haifeng Lu , Meng Wang , Hong Yang\",\"doi\":\"10.1016/j.giant.2024.100271\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Near-infrared (NIR) light-responsive liquid crystal elastomers (LCEs) doped with organic small-molecule photothermal agents have garnered scientific attention. However, the challenge remains in designing and synthesizing mesogenic photothermal dyes with absorption wavelengths greater than 800 nm. In this research, we design a novel discotic mesogenic NIR absorbing dye, namely the nickel bis(dithiolene) complex YHD868, and prepare NIR-responsive LCE/YHD868 composite films. The discotic mesogenic molecule YHD868 possesses a columnar hexagonal mesophase and exhibits intense NIR absorption at 868 nm, with a photothermal conversion efficiency of about 27 % and a molar extinction coefficient of approximately 30000 M<sup>−1</sup>·cm<sup>−1</sup>. Due to the strong NIR absorption of YHD868, combined with its excellent photothermal stability, the LCE/YHD868 composite films exhibit remarkable photoresponse and mechanical properties. Even at a low doping concentration of 0.2 wt%, the composite film can achieve a tensile strength of 9.8 MPa and an elongation at break of 165 %. Under 880 nm NIR irradiation (3.3 W·cm<sup>−2</sup>), the film can complete reversible photo-induced shrinking deformation in just 2 s, with a shrinkage ratio of about 64 %. This work offers a new approach for the development of photo-responsive smart soft materials.</p></div>\",\"PeriodicalId\":34151,\"journal\":{\"name\":\"GIANT\",\"volume\":\"18 \",\"pages\":\"Article 100271\"},\"PeriodicalIF\":5.4000,\"publicationDate\":\"2024-04-26\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S2666542524000365/pdfft?md5=328436d827e188b32fad7e281360e927&pid=1-s2.0-S2666542524000365-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"GIANT\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2666542524000365\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"GIANT","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2666542524000365","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
A Discotic Mesogenic near-infrared absorbing dye and its application in photo-responsive liquid crystal elastomers
Near-infrared (NIR) light-responsive liquid crystal elastomers (LCEs) doped with organic small-molecule photothermal agents have garnered scientific attention. However, the challenge remains in designing and synthesizing mesogenic photothermal dyes with absorption wavelengths greater than 800 nm. In this research, we design a novel discotic mesogenic NIR absorbing dye, namely the nickel bis(dithiolene) complex YHD868, and prepare NIR-responsive LCE/YHD868 composite films. The discotic mesogenic molecule YHD868 possesses a columnar hexagonal mesophase and exhibits intense NIR absorption at 868 nm, with a photothermal conversion efficiency of about 27 % and a molar extinction coefficient of approximately 30000 M−1·cm−1. Due to the strong NIR absorption of YHD868, combined with its excellent photothermal stability, the LCE/YHD868 composite films exhibit remarkable photoresponse and mechanical properties. Even at a low doping concentration of 0.2 wt%, the composite film can achieve a tensile strength of 9.8 MPa and an elongation at break of 165 %. Under 880 nm NIR irradiation (3.3 W·cm−2), the film can complete reversible photo-induced shrinking deformation in just 2 s, with a shrinkage ratio of about 64 %. This work offers a new approach for the development of photo-responsive smart soft materials.
期刊介绍：
Giant is an interdisciplinary title focusing on fundamental and applied macromolecular science spanning all chemistry, physics, biology, and materials aspects of the field in the broadest sense. Key areas covered include macromolecular chemistry, supramolecular assembly, multiscale and multifunctional materials, organic-inorganic hybrid materials, biophysics, biomimetics and surface science. Core topics range from developments in synthesis, characterisation and assembly towards creating uniformly sized precision macromolecules with tailored properties, to the design and assembly of nanostructured materials in multiple dimensions, and further to the study of smart or living designer materials with tuneable multiscale properties.
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