Wang Peiyao, Bai Silan, Chen Chen, You Yongtao, Xiao Junhui, Guo Xinrong, Wang Lishi
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, People's Republic of China.
Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan 523808, People's Republic of China; Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, People's Republic of China.
Spectrochim Acta A Mol Biomol Spectrosc. 2023 Dec 15;303:123242. doi: 10.1016/j.saa.2023.123242. Epub 2023 Aug 10.
Rose Bengal (RB) is used as a sensitizer in ambient water due to its property of catalyzing the production of singlet oxygen (O). However, this property also brings phototoxicity and carcinogenicity. The NaYF:3%Er@NaYF core-shell upconversion nanoparticles (UCNPs) with higher upconversion efficiency was synthesized to detect RB in ambient water. Due to fluorescence resonance energy transfer (FRET) between RB and UCNPs, the upconversion fluorescence at 538 nm emitted by UCNPs was quenched by the RB, while the emission at 566 nm of RB raised. In the best conditions, the ratiometric emission intensity F/F was positively proportional to RB concentration and the linear range was 0.04-15.0 μg·mL (R = 0.996). The detection limit (S/N = 3) of RB was 2.46 ng·mL. The recoveries ranged from 99.0% to 105.6% (relative standard deviation 0.97-3.24%, n = 3) in tap water and 100.3%-104.9% (relative standard deviation 0.66-1.94%, n = 3) in lake water. This proposed method exhibits lower detection limit and larger linear, which possesses practical application value to the detection of RB in water.
孟加拉玫瑰红（RB）因其催化单线态氧（O）生成的特性而被用作环境水中的敏化剂。然而，这一特性也带来了光毒性和致癌性。合成了具有较高上转换效率的NaYF:3%Er@NaYF核壳上转换纳米颗粒（UCNPs）用于检测环境水中的RB。由于RB与UCNPs之间的荧光共振能量转移（FRET），UCNPs发射的538 nm处的上转换荧光被RB猝灭，而RB在566 nm处的发射增强。在最佳条件下，比率发射强度F/F与RB浓度呈正比，线性范围为0.04 - 15.0 μg·mL（R = 0.996）。RB的检测限（S/N = 3）为2.46 ng·mL。自来水中的回收率为99.0%至105.6%（相对标准偏差0.97 - 3.24%，n = 3），湖水中的回收率为100.3% - 104.9%（相对标准偏差0.66 - 1.94%，n = 3）。该方法具有较低的检测限和较大的线性范围，对水中RB的检测具有实际应用价值。
