School of Chemistry and Chemical Engineering, and Institute of Environmental Science, Shanxi University, Taiyuan, 030006, China.
Mikrochim Acta. 2021 Sep 6;188(10):324. doi: 10.1007/s00604-021-04987-8.
N, Cl-doped carbon dots (N, Cl-CDs) were prepared by hydrothermal method from rhodamine B (RhB) and ethylenediamine (EDA). The resulting N, Cl-CDs exhibited fascinating solvent dependence and strict excitation independence. As the polarity of the solvent increased (from tetrahydrofuran (THF) to water), the emission spectrum of N, Cl-CDs was redshifted and the fluorescence efficiency decreased, which were attributed to hydrogen bond-induced aggregation. Taking advantage of these attributes, the N, Cl-CDs were used as suitable probes for fluorescence and colorimetric dual-mode detection of water in THF. The linear relationship was 0.5-100% water with the detection limit down to 0.093%. Moreover, the sensing platform was converted into a paper-based sensor for handy, real-time, and visible humidity sensing. N, Cl-CDs/PVA films were fabricated and realized continuously tunable solid-state fluorescence, further expanding their practical application.
氮、氯掺杂碳点（N, Cl-CDs）是通过水热法从罗丹明 B（RhB）和乙二胺（EDA）制备的。所得到的 N, Cl-CDs 表现出迷人的溶剂依赖性和严格的激发独立性。随着溶剂极性的增加（从四氢呋喃（THF）到水），N, Cl-CDs 的发射光谱发生红移，荧光效率降低，这归因于氢键诱导的聚集。利用这些特性，N, Cl-CDs 被用作荧光和比色双模式检测 THF 中水分的合适探针。线性关系为 0.5-100%水，检测限低至 0.093%。此外，传感平台被转化为基于纸张的传感器，用于方便、实时和可见的湿度传感。N, Cl-CDs/PVA 薄膜被制备并实现了连续可调谐的固态荧光，进一步扩展了它们的实际应用。
