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Redox-Triggered Bonding-Induced Emission of Thiol-Functionalized Gold Nanoclusters for Luminescence Turn-On Detection of Molecular Oxygen
ACS Sensors ( IF 8.9 ) Pub Date : 2017-11-15 00:00:00 , DOI: 10.1021/acssensors.7b00643
Hang Ao 1 , Hui Feng 1 , Mengting Zhao 1 , Meizhi Zhao 1 , Jianrong Chen 1 , Zhaosheng Qian 1
Affiliation  

Most optical sensors for molecular oxygen were developed based on the quenching effect of the luminescence of oxygen-sensitive probes; however, the signal turn-off mode of these probes is undesirable to quantify and visualize molecular oxygen. Herein, we report a novel luminescence turn-on detection strategy for molecular oxygen via the specific oxygen-triggered bonding-induced emission of thiol-functionalized gold nanoclusters. Thiol-functionalized gold nanoclusters were prepared by a facile one-step synthesis, and as-prepared gold nanoclusters possess significant aggregation-induced emission (AIE) property. It is the first time to discover the oxygen-triggered bonding-induced emission (BIE) behavior of gold nanoclusters, which results in disulfide-linked covalent bonding assemblies with intensely red luminescence. This specific redox-triggered BIE is capable of quantitatively detecting dissolved oxygen in aqueous solution in a light-up manner, and trace amount of dissolved oxygen at ppb level is achieved based on this detection method. A facile and convenient test strip for oxygen detection was also developed to monitor molecular oxygen in a gas matrix. Covalent bonding-induced emission is proven to be a more efficient way to attain high brightness of AIEgens than a physical aggregation-induced emission process, and provides a more convenient and desirable detection method for molecular oxygen than the previous sensors.

中文翻译:

氧化还原引发的硫醇官能化金纳米簇的键合诱导发射,用于分子氧的发光开启检测。

大多数基于分子氧的光学传感器都是基于对氧敏感的探针的发光的猝灭效应而开发的。然而,这些探针的信号关闭模式对于定量和可视化分子氧是不可取的。在这里,我们报告了一种新的分子氧通过特定的氧触发键诱导的硫醇官能化金纳米团簇发射的发光检测策略。硫醇官能化的金纳米团簇通过简便的一步合成方法制备,制备的金纳米团簇具有显着的聚集诱导发射(AIE)特性。这是首次发现金纳米团簇的氧触发键诱导发射(BIE)行为,这导致具有强烈红色发光的二硫键共价键组装体。该特定的氧化还原触发的BIE能够以点亮的方式定量地检测水溶液中的溶解氧,并且基于该检测方法可以实现痕量的ppb水平的溶解氧。还开发了一种方便,便捷的氧检测试纸来监测气体基质中的分子氧。与物理聚集体诱导的发射过程相比,共价键诱导的发射被证明是获得高AIEgens高亮度的更有效方法,并且比以前的传感器为分子氧提供了更方便和理想的检测方法。还开发了一种方便,便捷的氧检测试纸来监测气体基质中的分子氧。与物理聚集体诱导的发射过程相比,共价键诱导的发射被证明是获得高AIEgens高亮度的更有效方法,并且比以前的传感器为分子氧提供了更方便和理想的检测方法。还开发了一种方便,便捷的氧检测试纸来监测气体基质中的分子氧。与物理聚集体诱导的发射过程相比,共价键诱导的发射被证明是获得高AIEgen亮度的更有效方法,并且比以前的传感器为分子氧提供了更方便和理想的检测方法。
更新日期:2017-11-18
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