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A fluorescent probe for detecting lead ions and its preparation method

A technology of fluorescent probes and lead ions, applied in fluorescence/phosphorescence, chemical instruments and methods, luminescent materials, etc., can solve the problems of few literature reports on lead ions, and achieve high yield and good photostability

Inactive Publication Date: 2018-08-10
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are few literature reports on the detection of lead ions with rhodamine derivative fluorescent probes

Method used

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  • A fluorescent probe for detecting lead ions and its preparation method
  • A fluorescent probe for detecting lead ions and its preparation method
  • A fluorescent probe for detecting lead ions and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: the synthetic route of fluorescent probe

[0018] 1) Synthesis of 2,6-diformyl-4-methylphenol

[0019]

[0020] Add 6.0g 2-hydroxyl-5-methyl-1,3 benzenedimethanol (35.7mmol) and 46.6gMnO in the 250mL three-necked flask 2 (535.5mmol), 150mL 1,4-dioxane, stirred and heated to 100°C, stirred for 18h. The reaction was tracked by thin-layer chromatography, and the reaction was stopped after the raw material point disappeared. Sand core funnel was filtered, and the filtrate was separated by column chromatography (eluent, petroleum ether: ethyl acetate = 15:1) to obtain 2,6-diformyl-4-methylphenol.

[0021] 1 H NMR (400MHz, CDCl 3 )δ / ppm: 11.45(s, 1H), 10.21(s, 2H), 7.77(s, 2H), 2.39(s, 3H).

[0022] 2) Synthesis of rhodamine 6G fluorescent probes

[0023]

[0024] Add 0.55g rhodamine 6G ethylenediamine derivative (1.2mmol) and 0.10g 2,6-diformyl-4-methylphenol (0.6mmol) into a 100mL three-neck flask, add 30mL ethanol, stir and heat to reflux for 3h ...

Embodiment 2

[0030] Embodiment 2: the application of fluorescent probe in lead ion detection

[0031] Preparation of fluorescent probe solution: Accurately take 52 mg of fluorescent probe, dissolve it with acetonitrile and deionized water (volume ratio 1:1), transfer to a volumetric flask of 500 mL to constant volume, and prepare a concentration of 1.0×10 -4 Fluorescent probe stock solution (stored at 4°C, protected from light), diluted to the required concentration before use.

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Abstract

The invention discloses a rhodamine 6G lead ion fluorescent probe. A compound with a structure shown in the formula I and lead ions undergo a reaction so that the solution color and fluorescence properties are changed. The fluorescent probe can be used for lead ion fluorescence detection and visual detection.

Description

technical field [0001] The invention belongs to the field of fluorescent probes and their preparation, in particular to a fluorescent probe for detecting lead ions and a preparation method thereof. Background technique [0002] With the vigorous development of metallurgy, electroplating, mechanical processing, heavy metal chemical industry and other industries, the pollution of heavy metal elements has become increasingly serious. Toxic heavy metal pollution represented by heavy metal ions such as lead, mercury, and cadmium is one of the major pollution sources facing environmental pollution. Lead can cause damage to all organs of the human body, mainly the nervous, digestive, immune and reproductive systems. Therefore, it is of great significance to develop fast, simple, low-cost and high-sensitivity lead ion detection methods. [0003] The fluorescent probe method has attracted much attention due to its simplicity, rapidity, high sensitivity, good selectivity, and ease o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06C07D519/00C07D491/107G01N21/64
Inventor 万均张坤李玉源李超
Owner QINGDAO UNIV OF SCI & TECH
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