谷胱甘肽稳定的发绿光金纳米团簇用于钴离子的选择性检测。
Glutathione stabilized green-emission gold nanoclusters for selective detection of cobalt ion.
机构信息
Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, National Demonstration Center for Experimental Chemistry and Chemical Engineering Education (Yunnan University), School of Chemical Science and Technology, Yunnan University, Kunming 650091, China.
Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, National Demonstration Center for Experimental Chemistry and Chemical Engineering Education (Yunnan University), School of Chemical Science and Technology, Yunnan University, Kunming 650091, China.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2021 Jun 5;254:119628. doi: 10.1016/j.saa.2021.119628. Epub 2021 Feb 26.
A glutathione stabilized Au nanoclusters (GSH-Au NCs) was synthesized here and used to selective detection of cobalt ion. The as-prepared GSH-Au NCs had strong green light emission around 500 nm, and the features of the NCs have been systematically characterized by UV-vis absorption, X-ray photoelectronic spectroscopic, Fourier transform infrared spectroscopy and transmission electron microscope characterization. The interactions between the GSH-Au NCs and metal ions was studied, and the results indicated that the fluorescence of the GSH-Au NCs could be quenched in the presence of Co ion at pH of 6.0. The quenching ratio was linear with the concentration of Co ions, and the calibration curve was I/I = 0.1187c + 0.6085 in the Co concentration ranges from 2.0 to 50.0 μM with correlation coefficient (R) of 0.9950 and the limit of detection (LOD, 3σ) of 0.124 μM. In addition, we collected environmental water samples to test the reliability of the method and demonstrated this method is simple, rapid, and selective.
本文合成了一种谷胱甘肽稳定的金纳米团簇（GSH-Au NCs），并将其用于钴离子的选择性检测。所制备的 GSH-Au NCs 在 500nm 左右有很强的绿光发射，通过紫外-可见吸收光谱、X 射线光电子能谱、傅里叶变换红外光谱和透射电子显微镜对 NCs 的特征进行了系统的表征。研究了 GSH-Au NCs 与金属离子的相互作用，结果表明，在 pH 值为 6.0 的条件下，Co 离子的存在可以使 GSH-Au NCs 的荧光猝灭。猝灭比与 Co 离子的浓度呈线性关系，Co 浓度在 2.0 至 50.0 μM 范围内的校准曲线为 I/I=0.1187c+0.6085，相关系数（R）为 0.9950，检测限（LOD，3σ）为 0.124 μM。此外，我们收集了环境水样来测试该方法的可靠性，结果表明该方法简单、快速、选择性好。
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