Luminescence Enhancement of a Gold Nanocluster Hydrogel Facilitated by Water for Erasable Water Writing and Visual Solvent Differentiation
Luminescence Enhancement of a Gold Nanocluster Hydrogel Facilitated by Water for Erasable Water Writing and Visual Solvent Differentiation
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水促进金纳米簇水凝胶的发光增强，用于可擦水书写和视觉溶剂区分
DOI：
10.1021/acssuschemeng.2c03488
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发表时间：
2022-08
影响因子：
8.4
通讯作者：
Wei Qi
中科院分区：
文献类型：
--
作者：
Jinglin Shen;Jing Fu;Jinbin Liu;Qi Liu;Jin Feng;Yongjie Zhang;Wei Qi
超小尺寸的金纳米团簇由于其独特的发光性质而引起了人们极大的兴趣。然而，通过方便的方法操纵/改善AuNC的发光仍然具有挑战性。本文报道了4，6-二氨基-2-嘧啶硫醇（DPT）稳定的AuNCs通过简单地使用水来有效增强发射。DPT-AuNCs在水溶液中可以聚集成水凝胶，并伴随着发光增强（量子产率从0.36%增加到3.07%）。然而，通过冷冻干燥获得的干凝胶是不发光的。向干凝胶中加入水可以再次触发发射。差示扫描量热法、X射线衍射和理论计算表明，水桥氢键在DPT-AuNCs的发射中起着至关重要的作用。此外，DPT-AuNC的水敏发光被应用于开发可擦除水书写材料和用于溶剂的视觉区分（例如，质子有机溶剂、非质子有机溶剂和水）。该研究为增强纳米金的发光性能提供了一种绿色、经济、方便的方法，揭示了水分子在纳米金发光中的重要作用，并为纳米金在光电功能材料中的应用提供了新的思路。
Gold nanoclusters (AuNCs) with an ultrasmall size have attracted enormous interest due to their unique luminescence properties. However, manipulating/improving the luminescence of AuNCs through a convenient method is still challenging. Herein, effective enhancement of emission by simply using water is reported for the AuNCs stabilized by 4,6-diamino-2-pyrimidinethiol (DPT). The DPT-AuNCs could aggregate into a hydrogel in aqueous systems, accompanied with luminescence enhancement (the quantum yield increased from 0.36 to 3.07%). However, the xerogel obtained by freeze-drying was non-luminescent. Addition of water to the xerogel could trigger the emission again. Differential scanning calorimetry, X-ray diffraction, and theoretical calculations reveal that water-bridged hydrogen bonds play crucial roles in the emission of DPT-AuNCs. Furthermore, the water-sensitive luminescence of DPT-AuNCs was applied for developing erasable water writing materials and for visual differentiation of solvents (e.g., protonic organic solvents, non-protonic organic solvents, and water). This study offers a green, cost-effective, and convenient strategy for enhancing the luminescence properties of AuNCs, reveals the crucial role of water molecules in the emission of AuNCs, and presents an application in optoelectronic functional materials.
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影响因子：
3
作者：
Grimme, Stefan
通讯作者：
Grimme, Stefan
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影响因子：
3.1
作者：
Song Nan;Xiao Peihong;Ma Ke;Kang Miaomiao;Zhu Wei;Huang Jiachang;Wang Dong;Tang Ben Zhong
通讯作者：
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影响因子：
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作者：
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影响因子：
9.5
作者：
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通讯作者：
Shuxian Zhu;Xiaoyu Wang;Y. Cong;Lu Liu;Lidong Li
影响因子：
3.7
作者：
Kresse, G;Furthmuller, J
通讯作者：
Furthmuller, J