Application of europium fluorescent probe based on terephthalic acid in aniline detection

A technology of terephthalic acid and terephthalate, applied in the application field of detecting aniline, can solve the problems of high cost, slow reaction, complicated operation, etc., and achieve high selectivity, good recyclability, and high sensitivity Effect

Active Publication Date: 2016-11-23
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 europium fluorescent probe based on terephthalic acid in aniline detection
  • Application of europium fluorescent probe based on terephthalic acid in aniline detection
  • Application of europium fluorescent probe based on terephthalic acid in aniline detection

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Experimental program
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Effect test

Embodiment 1

[0018] 0.5492g (1.5mmol) EuCl 3 ·6H 2 O, 0.0828g (0.5mmol) terephthalic acid and 0.8006g (3.5mmol) iodide 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-shaped europium fluorescent probe based on terephthalic acid, whose structural unit is [Eu (BDC)Cl(H 2 O)], where BDC represents a terephthalate group that loses protons on two carboxyl groups, belongs to the monoclinic crystal system, and the space group is P 2 1 / c, the unit cell parameter is α=γ=90°, β=103.352(4)°, unit cell volume Z=4. like figure 1 As shown, Eu1 adopts a seven-coordinated coordination mode, surrounded by four single-atom chelated carboxyl groups, two μ 2 -Cl - and a water to form a single-capped triangular prism.

[0019] 1. Fluorescence performance test...

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Abstract

The invention discloses application of a europium fluorescent probe based on terephthalic acid in aniline detection. The structural unit of the fluorescent probe is [Eu(BDC)Cl(H2O)], wherein BDC represents two terephthalic acid radicals with protons lost from carboxyl. The fluorescent probe has a good red fluorescence property, and shows bright red under irradiation of an ultraviolet lamp. In a water solution or DMF, aniline has a remarkable quenching effect on red fluorescence of the fluorescent probe, and therefore the fluorescent probe can be used for detecting aniline at high sensitivity, high selectivity and interference resistance, and has very good cyclic applicability to aniline detection.

Description

technical field [0001] The invention belongs to the technical field of aniline detection, and specifically relates to the application of a terephthalic acid-based europium fluorescent probe 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-aniline. [0003] Fluorescence sens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
CPCG01N21/6428
Inventor 徐玲冯会军刘冰焦桓
Owner SHAANXI NORMAL UNIV
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