A colorimetric fluorescent dual-channel sensor molecule for mercury ion recognition and its synthesis and application
A mercury ion and sensor technology, applied in the field of anion detection and chemical synthesis, can solve the problems of long recognition time and high cost, and achieve the effect of good naked-eye recognition effect.
Active Publication Date: 2019-05-17
南通诺林新科技有限公司
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Problems solved by technology
[0004] The purpose of the present invention is to provide a fast-response colorimetric fluorescence dual-channel sensor molecule for identifying mercury ions——2-cyanomethyl-imidazole [4,5 ] for the problems of long molecular recognition time and high cost of the current mercury ion sensor. -b] phenazine;
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[0036] The synthesis, characterization and application of the mercury ion sensor of the present invention to detect anions in aqueous solution will be further described through specific examples below.
[0037] Instruments and reagents
[0038] 1 H NMR was measured using a Mercury-400BB nuclear magnetic resonance instrument, and TMS was used as an internal standard. IR was measured using a Digilab FTS-3000 FT-IR infrared spectrometer (KBr tablet); the melting point was measured using an X-4 digital display microscopic melting point analyzer (the thermometer was not calibrated); the fluorescence spectrum was measured using a RF-5301 fluorescence spectrometer from Shimadzu Corporation, Japan Record.
[0039] The cations used were perchlorate, and the solvent was (DMSO / H 2 O (1:9, v / v) HEPES buffer solution (pH=7.2) (analytical grade). Other reagents were commercially available analytically pure.
[0040] 1. Synthesis of mercury ion fluorescent sensor
[0041] Add 1mmol of ...
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Abstract
The invention designs and synthesizes a sensor molecular for recognizing mercury ions with colorimetric fluorometric dual channel, namely 2-cyanomethyl-imidazole[4,5-b]phenazine. The sensor molecule is obtained by adopting normal butanol as a solvent and 2,3-diaminophenazine and ethyl cyanoacetate as a substrate to perform reflux reaction, performing the suction filter after the reaction and vacuum drying. When cation solutions are respectively added into a sensor molecular DMSO-H20 solution, the color of the solution immediately turns light only when Hg<2+> is added, the strong yellow fluorescence is completely quenched, so that the sensor molecule can specifically and selectively recognize Hg<2+> by virtue of fluorescence in an aqueous solution, the recognition process is not interfered with other cations. In addition, when the mercury ions are added under the room temperature, the fluorescence strength of the solution can be rapidly weakened (less than 3 seconds), and a good naked-eye recognition effect can be achieved. Hg<2+> test paper produced by using the sensor molecule can conveniently and rapidly detect the mercury ions in an environmental system.
Description
technical field [0001] The present invention relates to a mercury ion sensor molecule, in particular to a sensor molecule capable of identifying mercury ions through colorimetric fluorescence dual channels—2-cyanomethyl-imidazol[4,5-b]phenazine; the present invention also relates to The application of the mercury ion sensor molecule in an aqueous system to identify mercury ions by fluorescence colorimetry belongs to the field of chemical synthesis and the technical field of anion detection. Background technique [0002] As a well-known and highly toxic heavy metal, mercury (Hg) poses a serious threat to humans and aquatic ecosystems. Generally speaking, under the action of microorganisms, inorganic mercury ions will be converted into methylmercury, which can be easily absorbed by bacteria, plankton and fish in lakes and oceans. Then after accumulating and transforming in the food chain, the toxin will gradually accumulate, causing irreversible damage to the human brain, suc...
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IPC IPC(8): C07D487/04C09K11/06G01N21/64G01N21/78
CPCC07D487/04C09K11/06C09K2211/1044G01N21/643G01N21/78G01N2021/6432
Inventor 魏太保张海丽张有明林奇
Owner 南通诺林新科技有限公司