Fluorescent probe capable of detecting mercury ions by naked eyes as well as preparation method and application thereof

A fluorescent probe and mercury ion technology, applied in fluorescence/phosphorescence, chemical instruments and methods, luminescent materials, etc., can solve the problems of low sensitivity, complicated operation, difficult large-scale application, etc., and achieve good recognition effect and simple processing , the effect of visual color change is obvious

Active Publication Date: 2014-03-19
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used methods for the determination of trace mercury are: atomic absorption spectrometry, cold air atomic fluorescence spectrometry and gas chromatography. However, for traditional determination techniques, although it is an accurate and reliable method, the sensitivity is not high and the operation is complicated. , and the cost is high, it is difficult to apply on a large scale

Method used

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  • Fluorescent probe capable of detecting mercury ions by naked eyes as well as preparation method and application thereof
  • Fluorescent probe capable of detecting mercury ions by naked eyes as well as preparation method and application thereof
  • Fluorescent probe capable of detecting mercury ions by naked eyes as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: a kind of fluorescent probe that can detect mercury ion with naked eyes, its molecular structural formula is as follows:

[0027] .

Embodiment 2

[0029] Methods for preparing fluorescent probes for visual detection of mercury ions, such as figure 1 shown, including the following steps:

[0030] (1) Dissolve 23.07 g of 5-(diethylamino)-2-nitrosophenol hydrochloride (0.10 mol, M = 230.69 g / mol) in 200 mL of water, then gradually add 100 ml of Aqueous solution of sodium bicarbonate (0.10 mol, M = 84.01 g / mol). After fully stirring, filter and vacuum dry to obtain the intermediate product 5-(diethylamino)-2-nitrosophenol as a red powder.

[0031] (2) Dissolve 3.88 g of 5-(diethylamino)-2-nitrosophenol (0.02 mol, M = 194.23 g / mol) in 200 ml of absolute ethanol, and add 10% palladium on carbon (0.40 g) to the in the mixture. Under sufficient stirring, hydrogen gas was introduced under normal pressure. React until the color of the solution becomes colorless. Then ethyl benzoylformate (5.70 g, M=178.18 g / mol) was injected into the above system, and under hydrogen atmosphere, the oil bath was heated to reflux for 2 hours. ...

experiment example 1

[0034] Selective analysis of fluorescent probe detection of mercury ions described in Experimental Example 1: In order to detect whether the probe has good selectivity to mercury ions, various metal ions: PbCl 2 、 CoCl 2 ·6H 2 O, ZnCl 2 , CaCl 2 , NaCl, CuCl 2 2H 2 O, NiCl 2 , KCl, CdCl 2 2.5H 2 O. AgNO 3 , HgCl 2 , MgSO 4 , FeCl 3 , FeCl 2 The solids were respectively added to the water / acetonitrile mixed solution of the fluorescent probe (1), the probe concentration was 10 μM, and the fluorescence emission spectrum was measured. Depend on figure 2 It can be seen that the fluorescent probe is sensitive to mercury ions (Hg 2+ ) has a very specific fluorescent recognition effect, mercury ions (Hg 2+ ) was added, the fluorescence of the solution was enhanced by about 70 times, but there was no significant change after adding other metal ions.

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Abstract

The invention belongs to the field of organic micromolecule fluorescent probes, and in particular relates to a fluorescent probe capable of detecting mercury ions by naked eyes as well as a preparation method and an application thereof. The structural formula of the fluorescent probe is shown as follows (described in the specification). The mercury ion fluorescent probe provided by the invention has an exclusive identification effect and good sensitivity on the mercury ions (Hg<2+>) in a water phase; sample detection treatment is extremely simple; by using the fluorescent probe, the mercury ions can be quantitatively detected; and the change of color is obvious by visual inspection. Thus, the fluorescent probe has an application value.

Description

technical field [0001] The invention belongs to the field of organic small molecule fluorescent probes, in particular to a fluorescent probe capable of detecting mercury ions, a preparation method and application thereof. Background technique [0002] Mercury is one of the common heavy metals, and its high toxicity and harm to human beings and the environment have attracted worldwide attention. Mercury is widely distributed, and both elemental mercury and ionic mercury can be converted into methylmercury by bacteria in the environment. Methylmercury is lipophilic and can accumulate in the food chain. Once absorbed by the human body, it can cause prenatal brain damage. impairment, cognitive and motor impairment, deafness and blindness, immune system dysfunction and other hazards. Therefore, the detection of mercury ions has become a research focus. The commonly used methods for the determination of trace mercury are: atomic absorption spectrometry, cold air atomic fluoresce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06C07D265/36G01N21/64
Inventor 路建美张欠欠葛健锋王丽华
Owner SUZHOU UNIV
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