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1.青海大学省部共建三江源生态与高原农牧业国家重点实验室,青海 西宁 810016
2.青海大学 生态环境工程学院,青海 西宁 810016
乔亚丽,博士,讲师,研究方向:发光分析,E-mail:Qiaoylyl@163.com
收稿日期:2024-12-04,
修回日期:2025-01-04,
录用日期:2025-02-10,
网络出版日期:2025-06-06,
纸质出版日期:2025-08-15
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乔亚丽,肖国涛,周双喜.掺杂Eu(Ⅲ)的共价有机骨架材料对四环素的吸附和检测研究[J].分析测试学报,2025,44(08):1704-1711.
QIAO Ya-li,XIAO Guo-tao,ZHOU Shuang-xi.Tetracycline Adsorption and Detection by Eu(Ⅲ) Doped Covalent Organic Framework[J].Journal of Instrumental Analysis,2025,44(08):1704-1711.
乔亚丽,肖国涛,周双喜.掺杂Eu(Ⅲ)的共价有机骨架材料对四环素的吸附和检测研究[J].分析测试学报,2025,44(08):1704-1711. DOI: 10.12452/j.fxcsxb.241204576.
QIAO Ya-li,XIAO Guo-tao,ZHOU Shuang-xi.Tetracycline Adsorption and Detection by Eu(Ⅲ) Doped Covalent Organic Framework[J].Journal of Instrumental Analysis,2025,44(08):1704-1711. DOI: 10.12452/j.fxcsxb.241204576.
采用溶剂热法以1,3,5-三(对甲酰基苯基)苯和2,5-二氨基-1,4-二羟基苯二盐酸盐为构筑单元,同时引入核苷酸5´-一磷酸腺苷钠盐(AMP)为功能化试剂,合成了一种共价有机骨架材料(COF-AMP)。在此基础上利用COF-AMP中丰富的N、O原子与镧系金属铕的配位作用,将铕进一步稳定负载其上,制备得到掺杂Eu(Ⅲ)的共价有机骨架材料(COF-AMP-Eu)。利用SEM、XRD、XPS对COF-AMP-Eu的结构进行表征,并考察了COF-AMP-Eu的四环素吸附和荧光检测性能。COF-AMP-Eu在pH 6.06、室温下对四环素的最大吸附量为35.51 mg/g,吸附过程符合准二级动力学模型和Freundlich等温模型。以COF-AMP-Eu作为荧光探针,基于四环素对COF-AMP-Eu复合材料中Eu
3+
荧光的增强作用和COF-AMP-Eu材料对四环素的吸附预富集作用产生的信号放大效应,建立了一种快速、灵敏、选择性检测四环素的荧光分析方法,线性范围为0.01~4 µmol/L,检出限为2.0 nmol/L。
Herein,a lanthanide-based fluorescent COF(COF-AMP-Eu) was designed and prepared toward the adsorption and sensing of tetracycline(TC). First,1,3,5-tris(4-formylphenyl)benzene(TFPB) and 2,5-diaminohydroquinone dihydrochloride(DAHQ)were selected as the building units,and adenosine 5´-monophosphate sodium salt(AMP) as a functional reagent to create COF-AMP with abundant coordination N and O atoms. Then,COF-AMP-Eu was achieved through chelating Eu
3+
on the COF-AMP by abundant N and O binding sites. Scanning electron microscopy(SEM),X-ray powder diffractometer(XRD) and X-ray photoelectron spectroscopy(XPS) were used to characterize the structure of COF-AMP-Eu. The adsorption process of tetracycline(TC) by COF-AMP-Eu kept well to the pseudo-second-order and the Freundlich isotherm models,and the maximum adsorption capacity was 35.51 mg/g at pH 6.06 and room temperature. Based on the fluorescence sensitizing effect of tetracycline to Eu
3+
emission,a sensitive and selective fluorescence met
hod for detection of tetracycline was explored by using COF-AMP-Eu as probe. A good linear relationship was obtained in the tetracycline concentration range of 0.01-4 µmol/L,and the detection limit was as low as 2.0 nmol/L.
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