Sun Peng, Song Wanyu, Zou Yu, Tian Miaomiao, Zhang Fang, Chai Fang
Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang Province, Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin, 150025, Heilongjiang Province, China.
Purple Mountain Laboratories, Mozhou East Road, Nanjing, Jiangsu Province, 211111, People's Republic of China.
Anal Methods. 2023 Mar 30;15(13):1631-1638. doi: 10.1039/d3ay00056g.
Copper ions (Cu) are ubiquitous in the ecosystem and cause serious environmental pollution, posing a threat to human health. Therefore, sensitive detection of Cu is urgently needed. Herein, we employed a solvothermal method to prepare blue-emitting carbon dots (Met-CDs) using formamide (FA) and methionine (Met) as precursors, with a high quantum yield (QY) of 38%. Based on the good optical stability of Met-CDs and selective quenching by Cu, a sensitive probe using Met-CDs for the detection of Cu in water was successfully designed. Within the linear range of 0.15-2 μM, the limit of detection (LOD) was determined to be as low as 47.7 nM, enabling the quantitative detection of Cu. Moreover, the recovery data of the spiked analysis of lake/river water samples were also satisfactory and verified the feasibility of the probe by the analysis of Cu in natural conditions.
铜离子（Cu）在生态系统中普遍存在，会造成严重的环境污染，对人类健康构成威胁。因此，迫切需要对铜进行灵敏检测。在此，我们采用溶剂热法，以甲酰胺（FA）和蛋氨酸（Met）为前驱体，制备了发射蓝光的碳点（Met-CDs），其量子产率（QY）高达38%。基于Met-CDs良好的光学稳定性以及对铜的选择性猝灭作用，成功设计了一种用于检测水中铜的灵敏探针。在0.15 - 2 μM的线性范围内，检测限（LOD）低至47.7 nM，能够对铜进行定量检测。此外，对湖泊/河水水样加标分析的回收率数据也令人满意，通过对自然条件下铜的分析验证了该探针的可行性。
