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Application of terephthalic acid-europium fluorescent probe containing 1-ethyl-3-methylimidazole in aniline detection

A technology of terephthalic acid and methylimidazole, applied in the application field of terephthalic acid-europium fluorescent probe in the detection of aniline, can solve the problems of slow reaction, complicated operation and high cost, and achieve high selectivity and high Sensitivity, good recyclability effect

Inactive Publication Date: 2016-11-16
SHAANXI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the means used to detect aniline at home and abroad mainly include electrochemical method, spectrophotometer method, gas chromatography, high performance liquid chromatography, etc. These methods have all realized the detection of aniline, but they have some shortcomings, such as Complicated operation, slow response and high cost
Therefore, it is still a big challenge to realize the real-time sensitive detection of p-aniline

Method used

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  • Application of terephthalic acid-europium fluorescent probe containing 1-ethyl-3-methylimidazole in aniline detection
  • Application of terephthalic acid-europium fluorescent probe containing 1-ethyl-3-methylimidazole in aniline detection
  • Application of terephthalic acid-europium fluorescent probe containing 1-ethyl-3-methylimidazole in aniline detection

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Embodiment 1

[0019] 0.1836g (0.5mmol) EuCl 3 ·6H 2 O, 0.0832g (0.5mmol) terephthalic acid and 0.8006g (5.5mmol) chloride 1-ethyl-3-methylimidazolium ionic liquid are added in the reactor of 25mL polytetrafluoroethylene liner, mix well, then Place the reaction kettle in an oven, react at 170°C for 5 days, cool to room temperature, and wash with acetone and ethanol to obtain a colorless and transparent block of terephthalic acid containing 1-ethyl-3-methylimidazole- Europium fluorescent probes such as figure 1 As shown, its structural unit is [EMI] 2 [Eu 2 (BDC) 3 (H 2 -BDC)Cl 2 ], where EMI represents 1-ethyl-3-methylimidazole, H 2 -BDC means terephthalic acid, BDC means terephthalate that has lost protons on two carboxyl groups, belongs to the monoclinic crystal system, and the space group is P 2 1 / n, the unit cell parameter is β=104.088(3)°, unit cell volume Z=4.

[0020] 1. Fluorescence performance test

[0021] The inventor used the solid-state fluorescence test method ...

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Abstract

The invention discloses application of a terephthalic acid-europium fluorescent probe containing 1-ethyl-3-methylimidazole in aniline detection. A structural unit of the fluorescent probe is [EMI]2[Eu2(BDC)3(H2-BDC)Cl2], wherein EMI represents the 1-ethyl-3-methylimidazole, H2-BDC represents terephthalic acid, BDC represents proton-lost terephthalic acid radicals on two carboxyls and has excellent red fluorescence properties, bright red is shown under irradiation of ultraviolet light, the temperature rises from 25 DEG C to 200 DEG C, the fluorescent quenching is only 31%, the temperature is reduced from 200 DEG C to 25 DEG C, and the fluorescence intensity is restored to be original intensity. In an aqueous solution or DMF, aniline has the significant quenching effect on red fluorescence of the fluorescent probe. Therefore, the fluorescent probe can be used for high-sensitivity, high-selectivity and anti-jamming aniline detection and has good cyclic usability for aniline detection.

Description

technical field [0001] The invention belongs to the technical field of aniline detection, and in particular relates to the application of a terephthalic acid-europium fluorescent probe containing 1-ethyl-3 methylimidazole in the detection of aniline. Background technique [0002] Aniline widely exists in cigarettes, food and industrial waste gas, and has become a serious environmental pollutant and carcinogen. Among them, aniline will increase the incidence of lung cancer, and it is also an important sign of lung cancer. At present, the means used to detect aniline at home and abroad mainly include electrochemical method, spectrophotometer method, gas chromatography, high performance liquid chromatography, etc. These methods have all realized the detection of aniline, but they have some shortcomings, such as The operation is complicated, the response is slow, and the cost is high. Therefore, it is still a big challenge to realize the real-time sensitive detection of p-anil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
CPCG01N21/6402
Inventor 徐玲冯会军刘冰焦桓
Owner SHAANXI NORMAL UNIV
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