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A fluorescent probe containing rhodamine in the detection of hg 2+ application on

A fluorescent probe and reaction technology, used in luminescent materials, chemical instruments and methods, organic chemistry, etc., can solve the problems of high analysis cost, complicated pretreatment, and expensive instruments

Inactive Publication Date: 2017-05-24
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

current to Hg 2+ There have been many reports on the research of determination methods. These methods have their own advantages, but they also have disadvantages such as complicated pretreatment, expensive instruments, and high analysis costs.

Method used

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  • A fluorescent probe containing rhodamine in the detection of hg <sup>2+</sup> application on
  • A fluorescent probe containing rhodamine in the detection of hg <sup>2+</sup> application on
  • A fluorescent probe containing rhodamine in the detection of hg <sup>2+</sup> application on

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Synthesis of compound 1:

[0023] Dissolve 9.58g of Rhodamine B (20mmol) in 150mL of absolute ethanol, and slowly add 25mL of hydrazine hydrate (mass fraction: 85%) dropwise. The reaction system was stirred at reflux for 2 hours. After the reaction was completed, the solvent was evaporated under reduced pressure, and the remaining solid was dissolved in 150 mL of 1mol / L HCl solution, and 1mol / L NaOH solution was added dropwise with constant stirring to adjust the pH to 9-10. , thoroughly drained after washing with distilled water, and dried in a vacuum oven to obtain a pink solid, namely compound 1, determined by nuclear magnetic resonance: 1 H NMR (CDCl 3 ): δ7.92-7.95(m, 1H), 7.43-7.48(m, 2H), 7.09-7.13(m, 1H), 6.45-6.47(d, 2H), 6.41-6.42(d, 2H), 6.28 -6.31 (dd, 2H), 3.61 (s, 2H), 3.32-3.37 (q, 8H), 1.15-1.18 (t, 12H).

[0024] (2) Synthesis of fluorescent probes:

[0025] Add 4.56g of compound 1 (10mmol) into a 50mL three-necked flask, dissolve it with 8mL o...

Embodiment 2

[0028] (1) draw the Hg containing rhodamine of embodiment one gained 2+ The fluorescence emission spectrum of the aqueous solution of the bifunctional fluorescent probe with pH and pH at different pHs, the concentration is 0.16mg / mL, the abscissa is pH, and the ordinate is fluorescence intensity. figure 2 .

[0029] From figure 2 It can be seen that the probe has a sudden change in its fluorescence intensity when pH=3-6, and it can be seen that the fluorescence response range is between pH=3-6. And the response interval is relatively narrow, indicating that the probe pair H + The fluorescence response is very sensitive.

[0030] (2)) Draw the fluorescent emission spectrum of the rhodamine-containing bifunctional fluorescent probe obtained in Example 1 in a solution (pH=7) containing different metal ions, wherein the concentration of the fluorescent probe is 10 -4 M, metal ion Hg 2+ 、Cu 2+ , Zn 2+ , Fe 3 + , Pb 2+ , Mn 2+ , Ca 2+ 、Na 2+ and Mg 2+ The concentrati...

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Abstract

The invention relates to a fluorescent probe containing rhodamine in the detection of Hg 2+ The application on the fluorescent probe, the synthesis method of the fluorescent probe is to react the rhodamine with the carboxyl group at the 2-position with hydrazine hydrate to form a lactam, and react with the substance containing the formyl group to synthesize a 2+ A small molecule bifunctional fluorescent probe with excellent selective recognition performance.

Description

technical field [0001] The present invention relates to a kind of Hg containing rhodamine 2+ and pH bifunctional fluorescent probe and synthesis method, specifically relate to a kind of fluorescent probe containing rhodamine in detecting Hg 2+ on the application. Background technique [0002] Mercury is one of the most important metal cations due to its highly hazardous nature. Even low concentrations of mercury, whether in elemental or ionic form, are harmful to the brain, heart, kidneys, intestines, and stomach. Therefore, how to effectively detect Hg 2+ It has become a major subject facing many scientists. current to Hg 2+ There have been many reports on the study of determination methods. These methods have their own advantages, but they also have disadvantages such as complicated pretreatment, expensive instruments, and high analysis costs. Fluorescence photometry is favored by people because of its convenient operation, quick detection, and low cost, and the deve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06C07D491/107
Inventor 赵鑫王红霞戚裕翟荣佳朱威邵晶周梦超
Owner SUZHOU UNIV OF SCI & TECH
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