Zhang Qianru, Zhang Zhong, Xu Shihao, Liu Anqi, Da Liangguo, Lin Dan, Jiang Changlong
Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
Department of Chemistry, University of Science and Technology of China, Hefei 230026, China.
Anal Chem. 2023 Mar 7;95(9):4536-4542. doi: 10.1021/acs.analchem.2c05691. Epub 2023 Feb 24.
Assays for carbendazim (Car) with high sensitivity and on-site screening have been urgently required to protect the ecosystem and prevent disease. In this work, a simple, sensitive, and reliable sensing system based on photoinduced electron transfer was established to detect carbendazim utilizing ultrathin graphitic carbon nitride (g-CN) nanosheets and rhodamine B (RB). Carbendazim reacts with g-CN by electrostatic interactions to form π-π stacking, and the quenching of the blue fluorescence is caused by electron transfer. While RB works as a reference fluorescence sensor without any fluorescence change, leading to obvious ratiometric fluorescence variation from blue to purple. Under optimal conditions, a favorable linear range from 20 to 180 nM was obtained, with a low detection limit of 5.89 nM. In addition, a portable smartphone sensing platform was successfully used for carbendazim detection in real samples with excellent anti-interference capability, demonstrating the potential applications of carbendazim monitoring.
为了保护生态系统和预防疾病，迫切需要高灵敏度和现场筛查的多菌灵（Car）检测方法。在这项工作中，基于光致电子转移建立了一种简单、灵敏且可靠的传感系统，利用超薄石墨相氮化碳（g-CN）纳米片和罗丹明B（RB）检测多菌灵。多菌灵通过静电相互作用与g-CN反应形成π-π堆积，电子转移导致蓝色荧光猝灭。而RB作为参考荧光传感器，荧光无任何变化，导致从蓝色到紫色有明显的比率荧光变化。在最佳条件下，获得了20至180 nM的良好线性范围，检测限低至5.89 nM。此外，便携式智能手机传感平台成功用于实际样品中多菌灵的检测，具有出色的抗干扰能力，证明了多菌灵监测的潜在应用。
