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Double-pillararene mercury ion fluorescence sensor as well as preparation and application thereof

A fluorescent sensor and mercury ion technology, applied in the field of ion detection, can solve the problems of expensive instruments, restricting the use of detection methods, complex operations, etc.

Inactive Publication Date: 2018-05-29
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many methods have been reported to detect mercury ions, such as atomic emission spectrometry, atomic absorption spectrometry, electrochemical methods and inductively coupled plasma mass spectrometry (ICP-MS), etc. However, these methods usually require more complicated operations and expensive instruments. Seriously restrict the use of these detection methods

Method used

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  • Double-pillararene mercury ion fluorescence sensor as well as preparation and application thereof
  • Double-pillararene mercury ion fluorescence sensor as well as preparation and application thereof
  • Double-pillararene mercury ion fluorescence sensor as well as preparation and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1, the synthesis of mercury ion sensor QS

[0043] Weigh 0.48 g (0.6 mmol) of amidated column[5]arene (for the synthesis of amidated column[5]arene, see literature [G. F. Huo, Y. Han, J. Sun, C. G. Yan, J. Incl. Phenom. Macrocycl. Chem .,2016, 86,231-240.]) into a 100mL round bottom flask, add 50mL ethanol as solvent, slowly add 0.04g (0.3mmol) terephthalaldehyde and 0.5mL (8.8mmol) glacial acetic acid under stirring Catalyst, stirred at room temperature for 30min, heated to reflux at 80°C on an oil bath for 16h. Heat pumping after the reaction stops. The resulting solid was washed with ethanol three to five times, and then dried in a vacuum oven to obtain 0.81 g of a light yellow solid, which is the mercury ion sensor QS, with a yield of 80%.

[0044] (m.p. 140-143°C), 1 HNNR (600 MHZ, CDCl 3 ), δ 9.85-9.82 (d, J =18 Hz 2H,NH), δ 8.23-8.21 (d, J =12 Hz, 2H, N=CH), δ 7.82 (s, 3H, ArH), δ 6.78-6.58 (m,21H, ArH), δ 4.47 (s, 4H, OCH 2 CO), δ 3.87-3.45 (m...

Embodiment 2

[0047] Embodiment 2, sensor QS fluorescent recognition Hg 2+

[0048] Pipette 0.5 mL of QS (2×10 -4 mol L -1 ) DMSO solution in a series of 10 mL colorimetric tubes, and then add Hg 2+ , Ca 2+ , Mg 2+ , Ni 2+ , Cu 2+ , Cr 2+ , Cd 2+ , Pb 2+ , Ag + , Zn 2+ , Fe 3+ , Ba 2+ ,Co 2+ , La 3+ , Eu 2+ , Tb 2+ DMSO-H 2 O solution, if the fluorescence of QS is quenched, it means that Hg was added 2+ , if the fluorescence of QS does not change, it means that the addition of Hg is not 2+ .

Embodiment 3

[0049] Embodiment 3, preparation and application of mercury ion responsive film

[0050] Preparation of mercury ion-responsive films: glass plates were immersed in high concentration (200 µM) of QS in DMSO-H 2 O (water volume is 30%) solution, take it out and dry it in the air to form a QS film. The film exhibits yellow-green fluorescence under 365 nm UV light.

[0051] Hg 2+ Application of safety display materials: Dip an appropriate amount of Hg with a fine brush 2+ DMSO-H 2 O solution (C = 0.1mol / L), write a word on the gel film, such as "Hg", under a 365 nm ultraviolet lamp, it can be observed that the fluorescence of the writing part of the film is quenched, and the written content is highlighted (see Figure 7 ).

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Abstract

The invention discloses a double-pillararene mercury ion fluorescence sensor. Ethanol is taken as a solvent, amidated pillar[5]arene and p-phthalaldehyde are taken as substrates, the solvent and the substrates are subjected to refluxing under the catalytic action of glacial acetic acid, suction filtration is performed, a product is washed with ethanol and subjected to vacuum drying, and light yellow solids are obtained. The sensor can emit stronger yellow green fluorescence in a DMSO-H2O amphiphilic solution on the basis of aggregation. 16 common cation solutions are respectively added to theDMSO-H2O solution of the mercury ion sensor, it is discovered that fluorescence quenching of the mercury ion sensor can be realized only when mercury ions are added, besides, the fluorescence quenching and recognition processes are not disturbed by other ions, fluorescence detection limit of QS for Hg<2+> is 4.3*10<-8> M, and higher sensitivity is achieved. Besides, the sensor has self-aggregationbehavior, and a gel film prepared from the sensor can be applied to a safe display material of Hg<2+>.

Description

technical field [0001] The invention relates to a mercury ion sensor, in particular to a double-column aromatic hydrocarbon mercury ion fluorescence sensor obtained by the nucleophilic addition reaction of amide-modified pillar[5]arene and terephthalaldehyde, and belongs to the technical field of ion detection. Background technique [0002] In 2001, Tang Benzhong's research group discovered a peculiar phenomenon: some silole molecules hardly emit light in solution, but the light emission is greatly enhanced in the aggregated state or solid film. Because this luminescence enhancement is caused by aggregation, we vividly define this phenomenon as "aggregation-induced emission (AIE)". The AIE system is widely used in protein conformation research, biological imaging, biosensors, chemical sensors and other fields. [0003] Pillar arenes are a kind of cyclic oligomers formed by linking hydroquinone or hydroquinone ether at the para-position of the benzene ring through the methyl...

Claims

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Application Information

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IPC IPC(8): G01N21/64
CPCG01N21/643G01N2021/6432
Inventor 林奇江晓梅张有明姚虹魏太保
Owner NORTHWEST NORMAL UNIVERSITY
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