Beyond Molecular Design: Cocrystallization in Hydrogen-Bonded Organic Frameworks for Energy-Conserving Dehydration and Real-Time Luminescent Humidity Detection

被引：0

作者：

Sun, Wen-Zhu ^{[1
]}

Zhang, Wei-Jie ^{[1
]}

Xu, Ji-Tong ^{[1
]}

Liu, Dan-Qing ^{[1
]}

Ou, Bei-Qi ^{[1
]}

Chen, Ling ^{[1
]}

Ye, Jia-Wen ^{[1
]}

Chen, Xiao-Ming ^{[2
]}

机构：

[1] Jiangmen Key Laboratory of Synthetic Chemistry and Cleaner Production, School of Environmental and Chemical Engineering, Wuyi University, Guangdong, Jiangmen, China

[2] MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, IGCME, Sun Yat-Sen University, Guangzhou, China

来源：

Aggregate | 2025年 / 6卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Biological materials preservation - Humidity sensors - Light sensitive materials - Liquid crystals - Luminescence of inorganic solids - Luminescence of organic solids - Luminescent devices - Metamorphic rocks - Molecular docking - Structural analysis - Structural dynamics - Water absorption;

D O I：

10.1002/agt2.721

中图分类号：

学科分类号：

摘要：

Luminescent probes attract increasing attentions for the unique superiorities like visually real-time detecting. However, for optical humidity sensing, it is still quite challenging to attain facile dehydration/activation in sensing materials, due to the high polarity of water molecules, which limits their applications in real-time detection and energy-conserving applications. Here, we report two fluorescent hydrogen-bonded organic frameworks (HOFs), HPISF-H2O and TPISF. HPISF-H2O achieves water absorption in low humidity, but needs an energy-intensive step (heating to ∼92°C in air) to dehydrate. Conversely, despite only a hydroxyl group being replaced, TPISF cannot bind to H2O at all. In other words, real-time detection is not readily achieved through straightforward molecular design. Therefore, we propose a cocrystallization strategy to adjust their water-binding capacity. As a result, the HOF cocrystals are adjusted to have both good H2O absorptivity and very gentle desorbing operation without heating (dry gas blowing or vacuuming). Benefiting from this strategy, appreciable advantages for an effective humidity sensor are realized, including real-time detection (second-scale response/recovery) and distinguishing fluorescence variation. Efficient sensing across a broad relative humidity (RH) range (10.0%–80.0%) was further achieved. Moreover, the mechanistic insight of fluorescent sensing was ascertained through detailed analyses of structural transformation, spectroscopic data, and theoretical approach. © 2024 The Author(s). Aggregate published by SCUT, AIEI, and John Wiley & Sons Australia, Ltd.

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