College of Food Science and Technology, Bohai University, National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, Food Safety Key Lab of Liaoning Province, The Fresh Food Storage and Processing Technology Research Institute of Liaoning Provincial Universities, China.
College of Chemistry and Chemical Engineering, Bohai University, Jinzhou, Liaoning, 121013, China.
Anal Methods. 2021 Nov 4;13(42):5003-5010. doi: 10.1039/d1ay01394g.
In the present article, we report a novel fluorescent and colorimetric dual-signal sensing probe based on a CD-Cu complex for the detection of the phosphate ion (Pi). The yellow fluorescent carbon quantum dots (CDs) were simply synthesized one-step hydrothermal treatment of -phenylenediamine (OPD) and 4-aminobutyric acid (GABA). The method was based on the combination of the CDs and Cu to form a coordination complex. Pi can capture Cu on the surface of CDs, which brings about two kinds of signal change through competitive complexation, including fluorescence and UV-vis absorption. The probe could detect the Pi with a linear range of 0.01-1 mM with a detection limit of 3.75 μM for the fluorescence signal and a linear range of 0.01-1 mM with a detection limit of 4.38 μM for the colorimetric signal. And the change in absorption signal can be used to visually detect Pi. Furthermore, the proposed sensing system was successfully applied to determine Pi in practical water samples.
在本文中，我们报道了一种基于 CD-Cu 配合物的新型荧光和比色双信号传感探针，用于检测磷酸根离子（Pi）。黄色荧光碳量子点（CDs）通过邻苯二胺（OPD）和 4-氨基丁酸（GABA）的一步水热处理简单合成。该方法基于 CDs 和 Cu 的结合形成配位配合物。Pi 可以在 CDs 表面捕获 Cu，通过竞争配位，引起两种信号变化，包括荧光和紫外-可见吸收。该探针可以检测荧光信号的线性范围为 0.01-1 mM，检测限为 3.75 μM；比色信号的线性范围为 0.01-1 mM，检测限为 4.38 μM。吸收信号的变化可用于目视检测 Pi。此外，该传感系统成功应用于实际水样中 Pi 的测定。
