Key Laboratory of Modern Analytical Science and Separation Technology of Fujian Province, College of Chemistry, Chemical Engineering and Environment, Minnan Normal University, Zhangzhou 363000, People's Republic of China.
Key Laboratory of Modern Analytical Science and Separation Technology of Fujian Province, College of Chemistry, Chemical Engineering and Environment, Minnan Normal University, Zhangzhou 363000, People's Republic of China.
Spectrochim Acta A Mol Biomol Spectrosc. 2021 Apr 5;250:119231. doi: 10.1016/j.saa.2020.119231. Epub 2020 Nov 23.
Hypochlorite ions (ClO) are widely used in bleaching agents and disinfectants. However, high concentrations of chloride species are harmful to human health. Therefore, effective methods for the detection of ClO ions are required. In this study, using 4-fluorophthalic acid and glycine, nitrogen-fluorine co-doped carbon nanodots (N,F-CDs) were synthesized by one-pot hydrothermal synthesis for use as a fluorescent probe for the fluorometric detection of ClO in aqueous media, based on the inhibition of n → π* transitions. The excitation and emission peak centers of the N,F-CDs are at 387 and 545 nm, respectively. The N,F-CDs show a fast quenching response (<1 min) for ClO and can be used in a wide pH range (pH 4-13). Under optimal conditions, the fluorescence intensity decreased with increase in the ClO concentration from 0 to 35 μM, and a low limit of detection (9.6 nM) was achieved. This probe possesses excellent selectivity and high sensitivity and was used to analyze standardized samples of piped water, achieving a satisfactory recovery. Thus, this nitrogen-fluorine co-doped nanodot probe is promising for the detection of pollutants.
次氯酸根离子（ClO）广泛用于漂白剂和消毒剂。然而，高浓度的氯化物对人体健康有害。因此，需要有效的 ClO 离子检测方法。在这项研究中，使用 4-氟邻苯二甲酸和甘氨酸，通过一锅水热合成法合成了氮氟共掺杂碳纳米点（N，F-CDs），用作荧光探针，用于在水介质中通过荧光法检测 ClO，基于 n→π*跃迁的抑制。N，F-CDs 的激发和发射峰中心分别位于 387nm 和 545nm。N，F-CDs 对 ClO 具有快速的猝灭响应（<1 分钟），并且可以在宽 pH 范围（pH 4-13）内使用。在最佳条件下，荧光强度随 ClO 浓度从 0 增加到 35μM 而降低，检测限低至 9.6nM。该探针具有优异的选择性和高灵敏度，并用于分析自来水的标准样品，获得了令人满意的回收率。因此，这种氮氟共掺杂纳米点探针有望用于检测污染物。
