Molecularly imprinted polymers embedded with double perovskite quantum dots: A ratiometric fluorescence sensor for visible and fluorescent determination of Rhein

被引:20
|
作者
Zhu, Rongkun [1 ]
Du, Zengcheng [1 ]
Zhu, Mingfang [1 ]
Liang, Huanru [1 ]
Wang, Shumei [1 ,2 ,3 ]
Zhou, Qing [1 ]
Li, Rui [1 ]
Li, Yulan [1 ]
Zeng, Chaoying [1 ]
Liu, Wenhao [1 ]
Chen, Qiqing [1 ]
机构
[1] Guangdong Pharmaceut Univ, Coll Pharm, Guangzhou Higher Educ Mega Ctr, Guangzhou 510006, Peoples R China
[2] TCM, Key Lab Digital Qual Evaluat Chinese Mat Med State, Guangzhou 510006, Peoples R China
[3] Univ Guangdong Prov, Engn & Technol Res Ctr Chinese Mat Med Qual, Guangzhou 510006, Peoples R China
关键词
Double perovskite quantum dots; Molecular imprinting polymer; Ratiometric fluorescence sensor; Rhein; Visible and fluorescent determination; LARGE-SCALE SYNTHESIS; NANOCRYSTALS; EFFICIENT; HEALTH; CANCER; HPLC;
D O I
10.1016/j.cej.2023.143618
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A ratiometric fluorescence sensor based on molecularly imprinted polymers embedded with double perovskite quantum dots (green fluorescent CsPbBr3 (GPQDs) and red fluorescent CsPbI3 (RPQDs)) were prepared for the visible and fluorescent determination of Rhein. Double perovskite quantum dots were synthesized by a one-pot method with in-situ hydrolysis, and the fluorescent probes containing GPQDs and RPQDs with molecularly imprinted cavities (MIPs@RPQDs/GPQDs@SiO2) were synthesized by sol gel method. And the synthesized MIPs@RPQDs/GPQDs@SiO2 can emit two stable and independent fluorescence peaks at 520 nm with green fluorescence and at 695 nm with red fluorescence respectively. Since Rhein could specifically quench the red fluorescence without affecting the green fluorescence at 520 nm, a ratiomitric fluorescence sensor could be and was constructed with GPQDs as the internal standard signal and the RPQDs as the response signal. The sensor had a good linear relationship with the concentration of Rhein between 15 and 135 nM, and the detection limit was 1.90 nM (S/N = 3). Moreover, Rhein could be detected by observing the color transformation of the fluorescent probe directly with naked eyes. In addition, Rhein in the traditional Chinese medicine Rheum palmatum L. had been detected by the constructed ratiometric fluorescene probe with satisfactory.
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页数:10
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