Self‐Assembly of Helical Nanofibrous Chiral Covalent Organic Frameworks
| العنوان: | Self‐Assembly of Helical Nanofibrous Chiral Covalent Organic Frameworks |
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| المؤلفون: | Xihao Tang, Xiangji Liao, Xinting Cai, Jialin Wu, Xueying Wu, Qianni Zhang, Yilun Yan, Shengrun Zheng, Huawei Jiang, Jun Fan, Songliang Cai, Weiguang Zhang, Yi Liu |
| المصدر: | Angewandte Chemie International Edition. 62 |
| بيانات النشر: | Wiley, 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | General Medicine, General Chemistry, Catalysis |
| الوصف: | Despite significant progress on the design and synthesis of covalent organic frameworks (COFs), precise control over microstructures of such materials remains challenging. Herein, two chiral COFs with well-defined one-handed double-helical nanofibrous morphologies were constructed via an unprecedented template-free method, capitalizing on the diastereoselective formation of aminal linkages. Detailed time-dependent experiments reveal the spontaneous transformation of initial rod-like aggregates into the double-helical microstructures. We further demonstrated that the helical chirality and circular dichroism signal can be facilely inversed by simply adjusting the amount of acetic acid during synthesis. Moreover, by transferring chirality to achiral fluorescent molecular adsorbents, the helical COF nanostructures can effectively induce circularly polarized luminescence with the highest luminescent asymmetric factor (glum) up to ∼0.01. |
| تدمد: | 1521-3773 1433-7851 |
| DOI: | 10.1002/anie.202216310 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::75158b3750972e05edd7219dbc45ef8f https://doi.org/10.1002/anie.202216310 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....75158b3750972e05edd7219dbc45ef8f |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15213773 14337851 |
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| DOI: | 10.1002/anie.202216310 |