Europium fluorescent probe and test paper based on diphenic acid and application thereof in the detection of p-phenylenediamine

A biphenyl dicarboxylic acid and fluorescent probe technology, applied in the directions of fluorescence/phosphorescence, luminescent materials, measuring devices, etc., can solve the problems of complicated operation, slow reaction, high cost, and achieve the effect of simple preparation method

Active Publication Date: 2017-08-18
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • Europium fluorescent probe and test paper based on diphenic acid and application thereof in the detection of p-phenylenediamine
  • Europium fluorescent probe and test paper based on diphenic acid and application thereof in the detection of p-phenylenediamine
  • Europium fluorescent probe and test paper based on diphenic acid and application thereof in the detection of p-phenylenediamine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 0.1831g (0.5mmol) EuCl 3 ·6H 2 O, 0.0828g (0.5mmol) biphenyl dicarboxylic acid and 1.0mL chlorinated 1-ethyl-3-methylimidazolium ionic liquid were added in a 25mL polytetrafluoroethylene-lined reactor, mixed evenly, and then the reactor was placed 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 biphenyl dicarboxylic acid, whose structural unit is [PMI] 2 [Eu 2 (BPDC) 3 Cl 2 ], where PMI represents the monovalent cation of 1-propyl-3-methylimidazolium, and BPDC represents the biphenyl dicarboxylate that has lost protons on the two carboxyl groups, and belongs to the monoclinic crystal system with the space group P 2 1 / c, the cell parameters are: α=γ=90°, β=96.6830(10)°, unit cell volume Z=4. Such as figure 1 As shown, Eu1 adopts a seven-coordinated coordination mode, surrounded by four monoatomic bridged carboxyl groups, a d...

Embodiment 2

[0022] Grind 3 mg of the biphenyldicarboxylic acid-based europium fluorescent probe obtained in Example 1 and add it to 20 mL of dimethylformamide, stir evenly, and drop 5 μL of the resulting fluorescent probe suspension onto a circular filter paper with a diameter of 0.7 cm and dried at 70°C to obtain biphenyl dicarboxylic acid-based europium fluorescent probe test paper.

Embodiment 3

[0024] The application of the europium fluorescent probe test paper based on biphenyl dicarboxylic acid in the detection of p-phenylenediamine in the aqueous phase in embodiment 2

[0025] 1. Selective detection of p-phenylenediamine

[0026] Add 33.2 μL of triethanolamine, 19.3 μL of dimethylformamide, 0.0270 g of p-phenylenediamine, 22.7 μL of aniline, 12.0 μL of formamide, 20.8 μL of n-propylamine, and 35 μL of diisopropylamine into 25 mL of HEPES buffer with a pH value of 6.7. Propylamine and 14.3μL ethylamine were prepared into 10mmoL / L solutions of different organic amines; 20μL of the above solutions were respectively added dropwise to fluorescent probe test paper for fluorescence testing. The results show that when the HEPES buffer solution containing triethanolamine, dimethylformamide, aniline, formamide, n-propylamine, diisopropylamine and ethylamine is added dropwise on the fluorescent probe test paper, the fluorescence intensity of the fluorescent probe test paper ...

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Abstract

The invention discloses an Europium fluorescent probe and test paper based on diphenic acid and application thereof in the detection of p-phenylenediamine, the structural unit of the fluorescent probe is [PMI]2[Eu2(BPDC)3C12], wherein the PMI represents 1-propyl-3-methylimidazole monovalent cation, BPDC represents diphenic acid radical that loses protons on two carboxyl groups; the fluorescent probe belongs to a monoclinic crystal system and the space group is P21/c. the crystal cell parameters are as follows: alpha is equal to gamma, which is equal to 90 degree, belta is equal to 96.6830(10) degree; and the crystal cell volume of z is equal to 4. The fluorescent probe of the invention has excellent red fluorescence properties and shows bright red under the irradiation of an ultraviolet lamp, the p-phenylenediamine in the aqueous phase has a significant quenching effect on the red fluorescence of the fluorescent probe and test paper, so the fluorescent probe and test paper can be used for detecting p-phenylenediamine with high sensitivity, high selectivity and anti-interference, the fluorescent probe and test paper are disposable (similar to normal pH test paper).

Description

technical field [0001] The invention belongs to the technical field of detection of p-phenylenediamine, and in particular relates to a biphenylenedicarboxylic acid-based europium fluorescent probe, a test paper based on the fluorescent probe, and an application of the test paper in detecting p-phenylenediamine. Background technique [0002] Amines are widely found in cigarettes, food and industrial waste gas, and are carcinogenic to the human body. Among them, p-phenylenediamine is mainly used in hair dyes. Frequent hair dyeing can lead to leukemia. This substance is currently put into some black shampoos in large quantities in violation of regulations, and it has carcinogenic effects on the human body. It has become a serious environmental pollutant and carcinogen. Among them, p-phenylenediamine will increase the incidence of lung cancer, and it is also an important sign of lung cancer. At present, the methods used to detect p-phenylenediamine at home and abroad mainly in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C07F5/00G01N21/64
CPCC07F5/003C09K11/06C09K2211/182G01N21/643G01N2021/6432
Inventor 徐玲韦震刘冰焦桓
Owner SHAANXI NORMAL UNIV
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