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An Aggregation-Induced Phosphorescence-Active "Turn-Off" Nanosensor Based on Ferric-Specific Quenching of Luminescent and Water-Soluble Au(I)-Cysteine Nanocomplexes.
Analytical Chemistry ( IF 6.7 ) Pub Date : 2020-04-10 , DOI: 10.1021/acs.analchem.0c01358 Xiangfang Lin 1 , Jiayu Liu 1 , Meng Tian 1 , Yunlong Bai 1 , Yu Bao 2 , Tong Shu 1 , Lei Su 1, 3 , Xueji Zhang 3
Analytical Chemistry ( IF 6.7 ) Pub Date : 2020-04-10 , DOI: 10.1021/acs.analchem.0c01358 Xiangfang Lin 1 , Jiayu Liu 1 , Meng Tian 1 , Yunlong Bai 1 , Yu Bao 2 , Tong Shu 1 , Lei Su 1, 3 , Xueji Zhang 3
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Recently, aggregation-induced emission (AIE) has attracted extensive attention. Herein we report an AIP-active "turn-off" nanosensor based on ferric-specific quenching of photoluminescence (PL) of water-soluble Au(I)-cysteine nanocomplexes. The Au(I)-cysteine nanocomplexes were AIP-active, showing a PL peak at 590 nm. Transmission electron microscopy (TEM) characterization revealed that they show the characteristic morphology of nanofibers. High-speed centrifugation characterization and zeta potential measurement indicated that they are highly water-soluble. Interestingly, their PL could be quenched specifically by ferric ions over the other common 18 metal ions. Further TEM characterizations revealed that the quenching process was accompanied by the ferric-specific dissociation of Au(I)-cysteine nanofibers. These observations have enabled the development of a water-soluble AIP-active "turn-off" nanosensor based on Au(I) nanocomplexes for selective and sensitive detection of ferric ions. This study indicates that specific quenching and disassociation of AIP-active nanocomplexes might be a promising route for development of novel luminescent nanosensors.
中文翻译：
基于发光和水溶性Au（I）-半胱氨酸纳米复合物的特定于铁的猝灭的聚集诱导的磷光活性“关闭”纳米传感器。
近来，聚集诱导发射（AIE）已引起广泛关注。本文中，我们报告了基于水溶性Au（I）-半胱氨酸纳米复合物的光致发光（PL）的铁特异性淬灭的AIP活性“关闭”纳米传感器。Au（I）-半胱氨酸纳米复合物具有AIP活性，在590 nm处显示PL峰。透射电子显微镜（TEM）表征显示它们显示出纳米纤维的特征形态。高速离心表征和ζ电势测量表明它们是高度水溶性的。有趣的是，它们的PL可以被其他18种常见金属离子上的铁离子专门淬灭。进一步的TEM表征表明，淬灭过程伴随着Au（I）-半胱氨酸纳米纤维的铁特异性解离。这些观察结果使得能够开发基于Au（I）纳米复合物的水溶性AIP活性“关闭”纳米传感器，用于选择性和灵敏地检测铁离子。这项研究表明，AIP活性纳米复合物的特异性猝灭和解离可能是开发新型发光纳米传感器的有前途的途径。
更新日期：2020-04-10
中文翻译：
基于发光和水溶性Au（I）-半胱氨酸纳米复合物的特定于铁的猝灭的聚集诱导的磷光活性“关闭”纳米传感器。
近来，聚集诱导发射（AIE）已引起广泛关注。本文中，我们报告了基于水溶性Au（I）-半胱氨酸纳米复合物的光致发光（PL）的铁特异性淬灭的AIP活性“关闭”纳米传感器。Au（I）-半胱氨酸纳米复合物具有AIP活性，在590 nm处显示PL峰。透射电子显微镜（TEM）表征显示它们显示出纳米纤维的特征形态。高速离心表征和ζ电势测量表明它们是高度水溶性的。有趣的是，它们的PL可以被其他18种常见金属离子上的铁离子专门淬灭。进一步的TEM表征表明，淬灭过程伴随着Au（I）-半胱氨酸纳米纤维的铁特异性解离。这些观察结果使得能够开发基于Au（I）纳米复合物的水溶性AIP活性“关闭”纳米传感器，用于选择性和灵敏地检测铁离子。这项研究表明，AIP活性纳米复合物的特异性猝灭和解离可能是开发新型发光纳米传感器的有前途的途径。
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