Yihan Chen, Yang Li, Hang Li, Lulu Li, Yiwu Quan, Yixiang Cheng
{"title":"通过胆甾烷液晶实现非手性紫外光敏感二色性染料驱动的可控 CPL 响应","authors":"Yihan Chen, Yang Li, Hang Li, Lulu Li, Yiwu Quan, Yixiang Cheng","doi":"10.1007/s11426-023-1846-0","DOIUrl":null,"url":null,"abstract":"<div><p>Versatile stimuli-responsive circularly polarized luminescent (CPL) materials have potential applications in information storage, security encryption, and intelligent displays. In this study, the <i>Z/E</i> isomerization of ultraviolet (UV)-photosensitive achiral <i>α</i>-cyanostilbene derivative was used as an achiral dichroic dye (<b>Switch</b>) to drive the controllable CPL-active response in cholesteric liquid crystals (CLCs). Under irradiation by 365 nm UV light, the resulting CLCs-<i>Z</i>-<b>Switch</b> underwent a <i>Z</i>-to-<i>E</i> configuration isomerization as CLCs-<i>E</i>-<b>Switch</b>, accompanied by a decrease in its dichroic order parameter (<i>S</i><sub>F</sub> value) from 0.15 to 0.07. Although the quantum yield (QY) of CLCs-<i>E</i>-<b>Switch</b> increased from 8.1% (CLCs-<i>Z</i>-<b>Switch</b>) to 16.8%, the corresponding <i>g</i><sub>lum</sub> values of CPL emission decreased from +0.55/−0.57 to +0.37/−0.39 due to a decrease in the order of helical arrangement of <i>E</i>-<b>Switch</b> in E7 media. This study enables photosensitive CLCs-<b>Switch</b> to be applied for optical information storage devices.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":772,"journal":{"name":"Science China Chemistry","volume":"67 4","pages":"1250 - 1255"},"PeriodicalIF":10.4000,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11426-023-1846-0.pdf","citationCount":"0","resultStr":"{\"title\":\"Controllable CPL response driven by achiral UV-photosensitive dichroic dye through cholesteric liquid crystals\",\"authors\":\"Yihan Chen, Yang Li, Hang Li, Lulu Li, Yiwu Quan, Yixiang Cheng\",\"doi\":\"10.1007/s11426-023-1846-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Versatile stimuli-responsive circularly polarized luminescent (CPL) materials have potential applications in information storage, security encryption, and intelligent displays. In this study, the <i>Z/E</i> isomerization of ultraviolet (UV)-photosensitive achiral <i>α</i>-cyanostilbene derivative was used as an achiral dichroic dye (<b>Switch</b>) to drive the controllable CPL-active response in cholesteric liquid crystals (CLCs). Under irradiation by 365 nm UV light, the resulting CLCs-<i>Z</i>-<b>Switch</b> underwent a <i>Z</i>-to-<i>E</i> configuration isomerization as CLCs-<i>E</i>-<b>Switch</b>, accompanied by a decrease in its dichroic order parameter (<i>S</i><sub>F</sub> value) from 0.15 to 0.07. Although the quantum yield (QY) of CLCs-<i>E</i>-<b>Switch</b> increased from 8.1% (CLCs-<i>Z</i>-<b>Switch</b>) to 16.8%, the corresponding <i>g</i><sub>lum</sub> values of CPL emission decreased from +0.55/−0.57 to +0.37/−0.39 due to a decrease in the order of helical arrangement of <i>E</i>-<b>Switch</b> in E7 media. This study enables photosensitive CLCs-<b>Switch</b> to be applied for optical information storage devices.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":772,\"journal\":{\"name\":\"Science China Chemistry\",\"volume\":\"67 4\",\"pages\":\"1250 - 1255\"},\"PeriodicalIF\":10.4000,\"publicationDate\":\"2023-12-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s11426-023-1846-0.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Science China Chemistry\",\"FirstCategoryId\":\"1\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11426-023-1846-0\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Science China Chemistry","FirstCategoryId":"1","ListUrlMain":"https://link.springer.com/article/10.1007/s11426-023-1846-0","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Controllable CPL response driven by achiral UV-photosensitive dichroic dye through cholesteric liquid crystals
Versatile stimuli-responsive circularly polarized luminescent (CPL) materials have potential applications in information storage, security encryption, and intelligent displays. In this study, the Z/E isomerization of ultraviolet (UV)-photosensitive achiral α-cyanostilbene derivative was used as an achiral dichroic dye (Switch) to drive the controllable CPL-active response in cholesteric liquid crystals (CLCs). Under irradiation by 365 nm UV light, the resulting CLCs-Z-Switch underwent a Z-to-E configuration isomerization as CLCs-E-Switch, accompanied by a decrease in its dichroic order parameter (SF value) from 0.15 to 0.07. Although the quantum yield (QY) of CLCs-E-Switch increased from 8.1% (CLCs-Z-Switch) to 16.8%, the corresponding glum values of CPL emission decreased from +0.55/−0.57 to +0.37/−0.39 due to a decrease in the order of helical arrangement of E-Switch in E7 media. This study enables photosensitive CLCs-Switch to be applied for optical information storage devices.
期刊介绍：
Science China Chemistry, co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China and published by Science China Press, publishes high-quality original research in both basic and applied chemistry. Indexed by Science Citation Index, it is a premier academic journal in the field.
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Highlights. Brief summaries and scholarly comments on recent research achievements in any field of chemistry.
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Reviews. In-depth summaries of representative results and achievements of the past 5–10 years in selected topics based on or closely related to the research expertise of the authors, providing a thorough assessment of the significance, current status, and future research directions of the field.
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