A Dual-emission CQDs Ratiometric Fluorescent Probe for Detecting Ag+ in Environmental Water Samples
ZHANG Yuecheng1, LI Miao1, ZHANG Yarong1, ZHANG Xinjie1, SUN Lingbo2, MA Hongyan1,*
1 College of Chemistry and Chemical Engineering, Yan’an University, Yan’an 716000, Shaanxi, China 2 Yan’an Medical College of Yan’an University, Yan’an 716000, Shaanxi, China
Abstract: A new single excitation dual-emission carbon quantum dots (OP-CQDs) was prepared by one-step hydrothermal method using o-phenylene-diamine (OPD) as the ingredient. The OP-CQDs had independent double emission peaks at 348 nm and 557 nm under the excitation at 300 nm. In the presence of Ag+, the fluorescence signal at 348 nm was quenched, while the signal at 557 nm was almost unchanged. Therefore, a novel Ag+ratiometric fluorometric method was established using the fluorescence reference signal at 557 nm and the response signal at 348 nm. The detection limit for Ag+was 4.0×10-8 mol/L, and the concentration of Ag+showed two linear relationships with F557/F348 within the scope of 5.0×10-8—3.0×10-6 mol/L and 3.0×10-6—5.0×10-5 mol/L. Moreover, the reaction mechanism was investigated and discussed by the variation of UV-Vis absorption spectrum and the change of quenching constant caused by temperature change. The fluorescence probe is simple, fast and highly sensitive for Ag+detection in environmental water.
1 Lim S Y, Shen W, Gao Z Q. Chemical Society Reviews, 2015, 44(1), 362. 2 Yi M N, Cao H M, Li S N S, et al. Spectroscopy and Spectral Analysis, 2023, 43(12), 3788 (in Chinese). 易敏娜, 曹汇敏, 黎双娜丝, 等. 光谱学与光谱分析, 2023, 43(12), 3788. 3 Yao J L, Zhang K, Zhu H J, et al. Analytical Chemistry, 2013, 85(13), 6461. 4 Wang X Y, Yu S M, Liu W, et al. ACS Sensors, 2018, 3(2), 378. 5 Deng M Y, Wang S, Liang C S, et al. RSC Advances, 2016, 6(32), 26936. 6 Lu S M, Wu D, Li G L, et al. RSC Advances, 2016, 6(105), 103169. 7 Fu L, Wang A W, Xie K F, et al. Sensors and Actuators B-Chemical, 2020, 304(C), 127390. 8 Tavallali H, Malekzadeh H, Dadvar F, et al. Arabian Journal of Chemistry, 2017, 10(S2), S2090. 9 Guo W, Hu S H, Zhang J Y, et al. Science of Total Environment, 2011, 409(15), 2981. 10 Liu X X, Li W, Shen Q P, et al. Talanta, 2011, 85(3), 1603. 11 Zhao X Y, Liao S, Wang L M, et al. Talanta, 2019, 201(15), 1. 12 Liu Q L, Ren B R, Liu R R, et al. Applied Chemistry, 2021, 38(11), 1512 (in Chinese). 刘巧玲, 任博荣, 刘睿蓉, 等. 应用化学, 2021, 38(11), 1512. 13 Pang Y Q, Gao H, Wu S H, et al. Materials Letters, 2017, 193, 236. 14 Yang X X, Cui F C, Ren R, et al. ACS Omega, 2019, 4, 12575. 15 Liu X J, Zhang N, Bing T, et al. Analytical Chemistry, 2014, 86, 2289. 16 Wang J X, Sun Z P, Wang P P, et al. Environmental Chemistry, 2023, 42(12), 4195 (in Chinese). 王俊霞, 孙正鹏, 王盼盼, 等. 环境化学, 2023, 42(12), 4195. 17 Nagaraj M, Ramalingam S, Murugan C, et al. Environmental Research, 2022, 212(PB), 113273. 18 Adela L W, Seymour I, Patella B, et al. Sensors and Actuators B-Chemical, 2021, 333, 129531. 19 Lai C Z, Melissa A F, Rosenildo C D C, et al. Analytical Chemistry, 2010, 82(18), 7634. 20 Xu S, Chen X J, Chen X, et al. Microchemical Journal, 2019, 147, 995. 21 Gao Z Q, Liu G G, Ye H H, et al. Analytical Chemistry, 2017, 89(6), 3622. 22 Deng H H, He S B, Lin X L, et al. Chinese Chemical Letters, 2019, 30(9), 1659. 23 Wang G K, Wang S L, Yan C L, et al. Colloids and Surfaces B:Biointerfaces, 2018, 167, 150. 24 Long Q, Wen Y Q, Li H T, et al. Journal of Fluorescence, 2017, 27(1), 205. 25 Yu C W, Li X X, Yang M, et al. Molecules, 2024, 29(21), 5196. 26 Jiang L Y, Xu X P, Qin Z R, et al. Spectroscopy and Spectral Analysis, 2021, 41(4), 1066 (in Chinese). 姜利英, 徐晓萍, 秦自瑞, 等. 光谱学与光谱分析, 2021, 41(4), 1066. 27 Li S Y, Zhou Q X, Li Z, et al. Chinese Chemical Letters, 2024, 35(5), 108693. 28 Yang J, Li L, Liang J D et al. Spectroscopy and Spectral Analysis, 2023, 43(9), 2761 (in Chinese). 杨晶, 李莉, 梁健丹, 等. 光谱学与光谱分析, 2023, 43(9), 2761. 29 Tao H L, Li S H, Xu M Z, et al. Journal of Instrumental Analysis, 2013, 32(2), 186 (in Chinese). 陶慧林, 黎舒怀, 徐铭泽, 等. 分析测试学报, 2013, 32(2), 186.
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2026, Vol. 40 
