高等学校化学学报 ›› 2024, Vol. 45 ›› Issue (8): 20240069.doi: 10.7503/cjcu20240069

• 分析化学 • 上一篇    下一篇

3,5-二硝基苯甲酸功能化的金属有机框架CAU-10-NH-DNBA荧光检测硫化氢

龚文朋(), 周林楠   

  1. 黄冈师范学院化学化工学院, 黄冈 438000
  • 收稿日期:2024-02-04 出版日期:2024-08-10 发布日期:2024-05-17
  • 通讯作者: 龚文朋 E-mail:1539380469@qq.com
  • 基金资助:
    湖北本科高校省级教学改革研究项目(2023473);黄冈师范学院重大培育项目(202211104);黄冈师范学院博士基金(2042021036)

Fluorescent Detection of Hydrogen Sulfide Using Metal-organic Framework CAU-10-NH-DNBA Functionalized with 3,5-Dinitrobenzoic Acid

GONG Wenpeng(), ZHOU Linnan   

  1. College of Chemistry and Chemical Engineering,Huanggang Normal University,Huanggang 438000,China
  • Received:2024-02-04 Online:2024-08-10 Published:2024-05-17
  • Contact: GONG Wenpeng E-mail:1539380469@qq.com
  • Supported by:
    the Hubei Provincial Teaching Reform Research Project for Undergraduate Universities, China(2023473);the Major Cultivation Project of Huanggang Normal University, China(202211104);the Huanggang Normal University Doctoral Research and Innovation Fund, China(2042021036)

摘要:

设计合成了一种基于3,5-二硝基苯甲酸功能化的金属有机框架CAU-10-NH-DNBA荧光探针, 可直接 用于H2S的检测. 首先, 以三氯化铝和5-氨基间苯二甲酸为原料, 在溶剂热条件下合成了金属有机框架 CAU-10-NH2; 然后, 在水溶液中, 以CAU-10-NH2和3,5-二硝基苯甲酸(DNBA)为原料, 在偶联剂1-乙基-(3-二甲基氨基丙基)碳二亚胺盐酸盐(EDC)和N-羟基琥珀酰亚胺(NHS)的共同作用下, 合成了CAU-10-NH-DNBA. 采用红外光谱、 X射线衍射谱、 固体核磁共振波谱、 X射线光电子能谱和扫描电子显微镜对其进行了表征. 结果表明, CAU-10-NH-DNBA的激发和发射波长分别为320和412 nm; H2S可使CAU-10-NH-DNBA荧光增强; 并考察了pH值、 时间和温度对检测效果的影响. 在最佳实验条件下, CAU-10-NH-DNBA对H2S的检出限为 2.43 μmol/L, 线性范围为3.9~62.5 μmol/L, 具有选择性高的优点. 该探针可应用于人血清样品中H2S含量的检测, 样品回收率为94.5%~96.1%.

关键词: 金属有机框架, 3,5-二硝基苯甲酸, 功能化, 荧光检测, 硫化氢

Abstract:

Fluorescent probe based on 3,5-dinitrobenzoic acid functionalized metal-organic framework CAU-10-NH-DNBA was designed for the direct detection of H2S. Firstly, Metal-organic framework CAU-10-NH2 was synthesized using AlCl3 and 5-amino-m-phthalic acid as raw materials under solvothermal conditions. Subsequently, CAU-10-NH-DNBA was synthesized in an aqueous solution using CAU-10-NH2 and 3,5-dinitrobenzoic acid(DNBA) as raw materials under the action of coupling agents 1-(3-dimethylaminopropyl)-3-ethylcarbimide(EDC) and N-hydroxy-succinamide(NHS). The excitation and emission wavelengths of the prepared CAU-10-NH-DNBA are 320 and 412 nm, respectively. The product was characterized by infrared spectroscopy, X-ray diffraction, solid state NMR, X-ray photoelectron spectroscopy and scanning electron microscopy. The influence of pH value, time and temperature on the detection effect was explored. Under the optimal conditions, the detection limit of H2S was 2.43 μmol/L, and the linear range was 3.9—62.5 μmol/L. The CAU-10-NH-DNBA has the advantages of high sensitivity and selectivity, and can be applied to the determination of H2S in human serum samples with a recovery range of 94.5%—96.1%.

Key words: Metal-organic framework, 3, 5-Dinitrobenzoic acid, Functionalization, Fluorescent detection, Hydrogen sulfide

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