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One for detecting hg 2+ Dual emission rare earth fluorescent probe, preparation method and application

A rare-earth fluorescence and dual-emission technology, applied in luminescent materials, fluorescence/phosphorescence, chemical instruments and methods, etc., to achieve high-sensitivity and selective detection, rapid and visual analysis

Active Publication Date: 2020-08-11
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods are structured by changes in the intensity of a single fluorescence and are therefore susceptible to factors such as source or detector drift or complex sample environments

Method used

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  • One for detecting hg <sup>2+</sup> Dual emission rare earth fluorescent probe, preparation method and application
  • One for detecting hg <sup>2+</sup> Dual emission rare earth fluorescent probe, preparation method and application
  • One for detecting hg <sup>2+</sup> Dual emission rare earth fluorescent probe, preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0042] Embodiment 1: for detecting Hg 2+ Preparation of Dual Emitter Rare Earth Fluorescent Probe 1

[0043] Isophthalic acid was dissolved in NaOH solution, and the pH value of the solution was adjusted to 10 with NaOH to prepare an isophthalic acid solution. Mix 3 μL of 10 mM luminol solution with 90 μL of 100 mM isophthalic acid (IPA) solution, stir for 30 minutes, and then add 30 μL of 100 mM Eu(NO 3 ) 3 Solution, continue to stir and react for 30 minutes, and add the obtained milky white flocculent precipitate into 477μL ultrapure water to obtain luminol:Eu 3+ :IPA molar concentration ratio of 0.05mM:5mM:15mM dual emission rare earth fluorescent probe 1 (luminol-Eu 3+ -IPA) suspension.

Embodiment 2

[0044] Embodiment 2: for detecting Hg 2+ Preparation of Dual Emission Rare Earth Fluorescent Probe 2

[0045] Isophthalic acid was dissolved in NaOH solution, and the pH value of the solution was adjusted to 10 with NaOH to prepare an isophthalic acid solution. Mix 3 μL of 10 mM luminol solution with 72 μL of 100 mM isophthalic acid (IPA) solution, stir for 20 minutes, and then add 24 μL of 100 mM Eu(NO 3 ) 3 solution, continue to stir and react for 20 minutes, and add the obtained milky white flocculent precipitate into 501 μL ultrapure water to obtain luminol:Eu 3+ :IPA molar concentration ratio is 0.05mM:4mM:12mM dual emission rare earth fluorescent probe 2 (luminol-Eu 3+ -IPA) suspension.

Embodiment 3

[0046] Embodiment 3: for detecting Hg 2+ Preparation of Dual Emission Rare Earth Fluorescent Probe 3

[0047] Isophthalic acid was dissolved in NaOH solution, and the pH value of the solution was adjusted to 10 with NaOH to prepare an isophthalic acid solution. Mix 3 μL of 10 mM luminol solution with 108 μL of 100 mM isophthalic acid (IPA) solution, stir for 40 minutes, and then add 36 μL of 100 mM Eu(NO 3 ) 3 solution, continue to stir and react for 40 minutes, and add the obtained milky white flocculent precipitate into 453 μL ultrapure water to obtain luminol:Eu 3+ :IPA molar concentration ratio is 0.05mM:6mM:18mM dual emission rare earth fluorescent probe 3 (luminol-Eu 3+ -IPA) suspension.

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Abstract

The invention relates to the technical field of environmental detection, and particularly discloses a double-emission rare-earth fluorescent probe for detecting Hg<2+>, and a preparation method and application of the double-emission rare-earth fluorescent probe. The double-emission rare-earth fluorescent probe is a net-like nano coordination polymer, and the preparation method comprises the following steps: under a condition of normal temperature and normal pressure, firstly mixing a luminal solution with an isophthalic acid (IPA) solution by stirring, then adding an Eu(NO3)3 solution, and continuing stirring for reacting, wherein the molar ratio of luminol to Eu<3+> to IPA is 1:(80-120):(240-360); and carrying out diluting with ultrapure water to obtain a luminol-Eu<3+>-IPA turbid liquid,wherein the final molar concentration ratio of the luminal to the Eu<3+> to the IPA is 0.05 mM:(4-6) mM:(12-18) mM. The double-emission rare-earth fluorescence probe has the characteristics of simplepreparation, rapid detection and environmental friendliness, double-detection of a ratio-fluorescence method and visual detection on Hg<2+> can be realized, and the advantages of high sensitivity andgood selectivity on Hg<2+> are achieved.

Description

technical field [0001] The invention belongs to the technical field of environmental detection, in particular to a method for detecting Hg 2+ Dual emission rare earth fluorescent probe, preparation method and application. Background technique [0002] Heavy metals are widely distributed in nature, most of which are toxic pollutants to the environment and biological systems. As a special heavy metal element, mercury is extremely toxic and usually exists in three forms: element, ion and organic mercury (Mercury Physicochemical and Biogeochemical Transformation in the Atmosphere and at Atmospheric Interfaces: A Review and Future Directions, Chemical Reviews, 115 , 10, 3760-3802). Mercury is mobile and widely distributed in the atmosphere, soil and ocean, and mercury is highly toxic. Once it enters the animal body, even a trace amount of mercury can cause serious physiological problems. For humans, trace amounts of mercury may cause a series of mercury poisoning diseases incl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06C08G83/00G01N21/64
CPCC08G83/008C09K11/06C09K2211/182G01N21/6428G01N21/643
Inventor 邱建丁童圆君梁汝萍
Owner NANCHANG UNIV
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