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Application of neutral anion fluorescent chemical sensor

A chemical sensor, anion technology, applied in scientific instruments, fluorescence/phosphorescence, instruments, etc., can solve the problems of difficult to exclude silver ion interference, difficult to exclude copper ion interference, etc., to overcome the effect of silver ion and copper ion interference

Inactive Publication Date: 2009-10-28
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the existing mercury ion detection methods, it is always difficult to exclude silver ions (Ag ions) with approximate charge distribution and volume. + ) interference
At the same time, in the fluorescence detection method, it is also difficult to exclude copper ions (Cu 2+ ) and the interference caused by the simultaneous quenching effect of mercury ions on the fluorescence of the detected substance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Application of a neutral anion fluorescent chemical sensor containing long-chain pyrene groups on C7 and C24 and thiourea groups on C3 and C24 in the fluorescence detection of mercury ions (antibody anion is perchlorate)

[0038] In dimethyl sulfoxide (DMSO) solution, prepare a series of the neutral anion fluorescent chemical sensor concentration fixed (5.0×10 -6 mol L -1 ) and the concentration of mercury ions (antibody anion is perchlorate) is changed, and its fluorescence spectrum is measured after standing for 1 hour. It was found that when the concentration of mercury ions gradually increased from 0 times to 2 times that of the anion acceptor, the intensity of the anion acceptor fluorescence (the fluorescence of the excimer association formed by the interaction of two fluorescent groups, at about 478nm) occurred by about 90% When the concentration of mercury ions continues to increase to 10 times, the fluorescence intensity gradually increases and recovers until i...

Embodiment 2

[0040] Application of a neutral anion fluorescent chemical sensor containing long-chain pyrene groups on C7 and C24 and thiourea groups on C3 and C24 in the fluorescence detection of mercury ions (antibody anion is acetate)

[0041] In dimethyl sulfoxide (DMSO) solution, prepare a series of neutral anion fluorescent chemical sensor concentration fixed (5.0×10 -6 mol L -1 ) and the concentration of mercury ions (antibody anion is acetate) is changed, and the fluorescence spectrum is measured after standing for 1 hour. It was found that when the mercury ion concentration gradually increased from 0 times to 2 times that of the anion acceptor, the fluorescence of the anion acceptor (the fluorescence of the excimer association formed by the interaction of two fluorescent groups, at about 478nm) intensity occurred at about 90 % quenching, when the concentration of mercury ions continues to increase to 10 times, the fluorescence intensity gradually increases and restores until it re...

Embodiment 3

[0043] Application of a neutral anion fluorescent chemical sensor containing long-chain pyrene groups on C7 and C24 and thiourea groups on C3 and C24 in the fluorescence detection of mercury ions (antibody anions are chloride ions)

[0044] In dimethyl sulfoxide (DMSO) solution, prepare a series of neutral anion fluorescent chemical sensor concentration fixed (5.0×10 -6 mol L -1 ) and the concentration of mercury ions (antibody anion is chloride ion) is changed, and the fluorescence spectrum is measured after standing for 1 hour. It was found that when the mercury ion concentration gradually increased from 0 times to 100 times that of the anion acceptor, the fluorescence of the anion acceptor (the fluorescence of the excimer association formed by the interaction of two fluorescent groups, at about 478nm) intensity occurred by 90% Quenching, when the concentration of mercury ions continues to increase to 200 times, its fluorescence intensity hardly changes, that is, when the a...

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Abstract

The invention discloses the application of a neutral anion fluorescent chemical sensor in mercury ion fluorescent detection. The sensor comprises a cholic acid molecule framework, an anion bonding unit thiourea or uramido and a sensed signal unit fluorescent molecular group and has a structural formula shown at the right side, wherein the R1 and R2 are the same fluorescent chemical groups; eitheror both of the R3 and R4 contain the thiourea group which can react with the mercury ions; 3, 7, 12 and 24 respectively indicate the carbon atoms of 3-, 7-, 12- and 24-position in the cholic acid molecule framework and the carbon atoms are respectively marked as C3, C7, C12 and C24; and the sensor is used for selectively sensing and responding metal mercury ions. The invention discloses the neutral anion fluorescent chemical sensor, which overcomes the silver ion and copper ion interference problems in the existing mercury ion detection and the detection sensitiveness can reach 1.0*10<-7> mol.L<-1>.

Description

technical field [0001] The invention relates to the field of harmful ion detection in analytical chemistry, in particular to the application of a neutral anion fluorescent chemical sensor in the fluorescent detection of mercury ions. Background technique [0002] Mercury and its compounds are widely used and have important applications in industrial production and people's daily life. In industrial production, it is mainly used in paints, household insecticides, fungicides, battery production and other chemical industries. For example, mercury can dissolve other metals to form amalgam: the amalgam method is commonly used in the metallurgical industry to extract metals such as gold, silver, and thallium; the chemical industry uses mercury as a cathode to electrolyze salt solution to produce caustic soda and chlorine; it is used to manufacture mercury arc rectifiers and mercury vacuum pumps. , new light sources and materials for temperature measuring and pressure measuring in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/542G01N21/64
Inventor 刘顺英刘彦运段孔荣余家会罗淑芳
Owner EAST CHINA NORMAL UNIV
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