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Emissive Substoichiometric Covalent Organic Frameworks for Water Sensing and Harvesting
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2022-11-22 , DOI: 10.1002/marc.202200751 Sayan Maiti 1 , Jatan K Sharma 2 , Jianheng Ling 3 , Dylan Tietje-Mckinney 1 , Matthew P Heaney 1 , Tomče Runčevski 1 , Matthew A Addicoat 4 , Francis D'Souza 2 , Phillip J Milner 3 , Anindita Das 1
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2022-11-22 , DOI: 10.1002/marc.202200751 Sayan Maiti 1 , Jatan K Sharma 2 , Jianheng Ling 3 , Dylan Tietje-Mckinney 1 , Matthew P Heaney 1 , Tomče Runčevski 1 , Matthew A Addicoat 4 , Francis D'Souza 2 , Phillip J Milner 3 , Anindita Das 1
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Emissive covalent organic frameworks (COFs) have recently emerged as next-generation porous materials with attractive properties such as tunable topology, porosity, and inherent photoluminescence. Among the different types of COFs, substoichiometric frameworks (so-called Type III COFs) are especially attractive due to the possibility of not only generating unusual topology and complex pore architectures but also facilitating the introduction of well-defined functional groups at precise locations for desired functions. Herein, the first example of a highly emissive (PLQY 6.8%) substoichiometric 2D-COF (COF-SMU-1) featuring free uncondensed aldehyde groups is reported. In particular, COF-SMU-1 features a dual-pore architecture with an overall bex net topology, tunable emission in various organic solvents, and distinct colorimetric changes in the presence of water. To gain further insights into its photoluminescence properties, the charge transfer, excimer emission, and excited state exciton dynamics of COF-SMU-1 are investigated using femtosecond transient absorption spectroscopy in different organic solvents. Additionally, highly enhanced atmospheric water-harvesting properties of COF-SMU-1 are revealed using FT-IR and water sorption studies.The findings will not only lead to in-depth understanding of structure–property relationships in emissive COFs but also open new opportunities for designing COFs for potential applications in solid-state lighting and water harvesting.
中文翻译：
用于水传感和收集的发射亚化学计量共价有机框架
发射共价有机骨架（COF）最近已成为下一代多孔材料，具有可调谐拓扑、孔隙率和固有光致发光等有吸引力的特性。在不同类型的 COF 中，亚化学计量骨架（所谓的 III 型 COF）特别有吸引力，因为它不仅可以产生不寻常的拓扑结构和复杂的孔结构，而且还可以促进在精确位置引入明确的官能团，以实现所需的功能。功能。在此，报道了具有游离未缩合醛基的高发射率 (PLQY 6.8%) 亚化学计量 2D-COF ( COF-SMU-1 ) 的第一个例子。特别是， COF-SMU-1具有双孔结构，具有整体bex网拓扑结构、在各种有机溶剂中的可调发射以及在水存在下明显的色度变化。为了进一步了解其光致发光特性，使用飞秒瞬态吸收光谱在不同的有机溶剂中研究了COF-SMU-1的电荷转移、准分子发射和激发态激子动力学。此外，通过 FT-IR 和吸水研究揭示了COF-SMU-1高度增强的大气集水性能。这些发现不仅将有助于深入了解发射性 COF 的结构-性能关系，而且还开辟了新的机遇用于设计 COF 以用于固态照明和集水方面的潜在应用。
更新日期：2022-11-22
中文翻译：
用于水传感和收集的发射亚化学计量共价有机框架
发射共价有机骨架（COF）最近已成为下一代多孔材料，具有可调谐拓扑、孔隙率和固有光致发光等有吸引力的特性。在不同类型的 COF 中，亚化学计量骨架（所谓的 III 型 COF）特别有吸引力，因为它不仅可以产生不寻常的拓扑结构和复杂的孔结构，而且还可以促进在精确位置引入明确的官能团，以实现所需的功能。功能。在此，报道了具有游离未缩合醛基的高发射率 (PLQY 6.8%) 亚化学计量 2D-COF ( COF-SMU-1 ) 的第一个例子。特别是， COF-SMU-1具有双孔结构，具有整体bex网拓扑结构、在各种有机溶剂中的可调发射以及在水存在下明显的色度变化。为了进一步了解其光致发光特性，使用飞秒瞬态吸收光谱在不同的有机溶剂中研究了COF-SMU-1的电荷转移、准分子发射和激发态激子动力学。此外，通过 FT-IR 和吸水研究揭示了COF-SMU-1高度增强的大气集水性能。这些发现不仅将有助于深入了解发射性 COF 的结构-性能关系，而且还开辟了新的机遇用于设计 COF 以用于固态照明和集水方面的潜在应用。
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