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Self-assembled copper nanoclusters structure-dependent fluorescent enhancement for sensitive determination of tetracyclines by the restriction intramolecular motion
Sensors and Actuators B: Chemical ( IF 8.4 ) Pub Date : 2021-09-09 , DOI: 10.1016/j.snb.2021.130729
Hai-Bo Wang 1 , Bei-Bei Tao 1 , An-Li Mao 1 , Zhong-Liang Xiao 2 , Yan-Ming Liu 1
Affiliation  

The exploration of turn-on fluorescent method for sensitive detection of tetracycline is still challenging. This paper reports a kind of specific structure of self-assembled copper nanoclusters (CuNCs), greatly enhancing the fluorescence emission intensity of tetracycline (TC). Fluorescence enhancement is mainly ascribed to that tetracycline can defuse into the compatible space of special structure of self-assembled CuNCs, and intramolecular motion of TC can be effectively restricted, leading to fluorescence emission enhancement of TC. The assay enables TC to be detected with high sensitivity and linear response that covers the 200 nM to 50 μM TC concentration range with a 40 nM limit of detection, which is lower by 50-fold than the method without self-assembled CuNCs. Furthermore, the strategy is further applied for determining TC contents in milk and urine samples.



中文翻译:

自组装铜纳米团簇结构依赖性荧光增强通过限制分子内运动灵敏测定四环素

探索灵敏检测四环素的开启荧光方法仍然具有挑战性。本文报道了一种自组装铜纳米团簇(CuNCs)的特定结构,大大增强了四环素(TC)的荧光发射强度。荧光增强主要归因于四环素可以融入自组装CuNCs特殊结构的相容空间,有效限制TC的分子内运动,导致TC的荧光发射增强。该测定法能够以高灵敏度和线性响应检测 TC,覆盖 200 nM 至 50 μM TC 浓度范围,检测限为 40 nM,比没有自组装 CuNC 的方法低 50 倍。此外,

更新日期:2021-09-17
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