Li Chunyan, Li Nan, Yang Liang, Liu Lei, Zhang Daohan
College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China.
Department of Gynecology, Second Hospital of Hebei Medical University, Shijiazhuang 050000, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2024 Mar 15;309:123824. doi: 10.1016/j.saa.2023.123824. Epub 2023 Dec 30.
During the synthesis of carbon dots, different heteroatom doping can change the fluorescence color and the emission wavelength when the same precursor is applied. In this study, we used o-phenylenediamine and L-lysine as raw materials, boric acid or phosphoric acid as different heteroatom dopants, and water as solvent to synthesize doped carbon dots through a simple microwave-assisted method. Finally, two kinds of doped carbon dots with different fluorescence colors under 365 nm UV light were obtained, of which the B-doped carbon dots (B-CDs) showed orange fluorescence, and the P-doped carbon dots (P-CDs) showed red fluorescence. Both carbon dots had satisfactory fluorescence quantum yields and can be used as fluorescence probes. Therefore, we investigated the detection performance of these two carbon dots when they were used as fluorescent probes. B-CDs can selectively detect Co with a detection limit of 0.1102 μM, and at the same time, it can realize the naked eye detection of Co in a certain concentration range. The P-CDs could sensitively detect methylene blue with a detection limit of 0.048 μM.
在碳点的合成过程中，当使用相同的前驱体时，不同的杂原子掺杂可以改变荧光颜色和发射波长。在本研究中，我们以邻苯二胺和L-赖氨酸为原料，硼酸或磷酸作为不同的杂原子掺杂剂，以水为溶剂，通过简单的微波辅助方法合成了掺杂碳点。最后，获得了两种在365 nm紫外光下具有不同荧光颜色的掺杂碳点，其中硼掺杂碳点（B-CDs）呈现橙色荧光，磷掺杂碳点（P-CDs）呈现红色荧光。两种碳点都具有令人满意的荧光量子产率，并且可以用作荧光探针。因此，我们研究了这两种碳点作为荧光探针时的检测性能。B-CDs可以选择性地检测Co，检测限为0.1102 μM，同时，它可以在一定浓度范围内实现对Co的肉眼检测。P-CDs可以灵敏地检测亚甲基蓝，检测限为0.048 μM。
