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Preparation method of a composite fluorescent hydrogel and its application in the detection of iron ions in water

A composite fluorescence and hydrogel technology, applied in the direction of fluorescence/phosphorescence, general water supply saving, chemical instruments and methods, etc., can solve the problems of insoluble in water, inconvenient to carry, poor stability of fluorescent probes, etc., and achieve low price , easy operation, excellent mechanical strength effect

Active Publication Date: 2022-05-17
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, most of the current fluorescent probes are used in liquid form. Liquid fluorescent probes have many problems such as poor stability, poor solubility in water, and inconvenient portability.
By loading the fluorescent probe into a material with good portability, good flexibility, certain mechanical properties and hydrophilicity, the relevant research on how to play the role of the fluorescent probe better and more practically has not been reported yet.

Method used

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  • Preparation method of a composite fluorescent hydrogel and its application in the detection of iron ions in water
  • Preparation method of a composite fluorescent hydrogel and its application in the detection of iron ions in water
  • Preparation method of a composite fluorescent hydrogel and its application in the detection of iron ions in water

Examples

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Effect test

Embodiment 1

[0032] A method for preparing P(BAcF-AM) / PEG composite fluorescent hydrogel, comprising the steps of:

[0033] (1) Preparation of BAcF:

[0034] Dissolve 4 g (0.012 mmol) of spironolactone-type fluorescein (CAS number: 2321-07-5) in dichloromethane, blow nitrogen gas, add triethylamine, and slowly add 1 mL dropwise to fluorescein under ice-bath conditions (0.012mmol) acryloyl chloride (control drop time is 30min) after stirring at room temperature for 12 hours, use a rotary evaporator to remove dichloromethane, then wash with acetone to filter triethylamine hydrochloride, and finally wash with water repeatedly After settling and suction filtration, the filter residue was freeze-dried for 48 hours to obtain the product acryloyloxyfluorescein (BAcF). Characterization of BAcF by infrared spectroscopic testing, such as figure 1 As shown by the curve a in the middle;

[0035] (2) Preparation of P(BAcF-AM) / PEG composite fluorescent hydrogel:

[0036] (a) Prepare an acrylamide so...

Embodiment 2

[0044] A preparation method of P(BAcF-AM) / PEG composite fluorescent hydrogel is as follows:

[0045] (1) Preparation of BAcF:

[0046] The amount of acryloyl chloride added was 2mL (the molar ratio of spironolactone fluorescein and acryloyl chloride was 1:2), and the other steps were the same as the preparation method in step (1) of Example 1, and the BAcF was characterized by infrared spectroscopy, Such as figure 1 As shown in the middle b curve;

[0047] (2) Preparation of P(BAcF-AM) / PEG composite fluorescent hydrogel:

[0048] (a) Prepare an acrylamide solution with a monomer concentration of 5 mol / L, weigh and add 0.2% by mole of the cross-linking agent BIS, 0.5% by mole of the initiator APS and 5% by weight of PEG-6000, the above solution Stir magnetically at room temperature for 5 minutes, weigh 0.1% by weight BAcF and dissolve it in 1mL DMSO evenly, mix the above two solutions evenly, transfer the whole into a three-necked flask, and pass nitrogen gas for 5 minutes; ...

Embodiment 3

[0054] A preparation method of P(BAcF-AM) / PEG composite fluorescent hydrogel is as follows:

[0055] (1) Preparation of BAcF:

[0056] The amount of acryloyl chloride added is 4mL (the molar ratio of spironolactone fluorescein and acryloyl chloride is 1:4), the others are the same as the preparation method in step (1) of Example 1, and the BAcF is characterized by infrared spectroscopy, such as figure 1 As shown in the curve of c;

[0057] (2) Preparation of P(BAcF-AM) / PEG composite fluorescent hydrogel:

[0058] (a) Prepare an acrylamide solution with a monomer concentration of 7mol / L, weigh and add 0.1% by mole of crosslinking agent BIS, 1% by mole of initiator APS and 8% by weight of PEG-6000, the above solution Stir magnetically at room temperature for 5 minutes, weigh 0.1% by weight BAcF and dissolve it in 1mL DMSO evenly, mix the above two solutions, transfer the whole into a three-necked flask, and pass nitrogen gas for 5 minutes;

[0059] (b) Add 46 μL TEMED to the ...

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Abstract

The invention discloses a preparation method of a composite fluorescent hydrogel and its application in detecting iron ions in water, belonging to the technical field of preparation and application of functional materials. Using spironolactone-type fluorescein and acryloyl chloride as raw materials, acryloyloxyfluorescein was obtained through acyl chloride reaction; followed by acrylamide and PEG (6000) in ammonium persulfate-N,N,N',N' ‑Tetramethylethylenediamine (APS‑TEMED) redox initiated system for free radical copolymerization. The prepared composite fluorescent hydrogel can combine with Fe 3+ interaction, available for Fe 3+ detection of Fe 3+ The lowest detection limit of 4.4μmol / L, the fluorescence intensity of the fluorescent hydrogel and Fe 3+ The concentration is linear within 32-192μmol / L. The composite fluorescent hydrogel prepared by the invention is convenient to carry, has low production cost, is green and efficient, and broadens the application scope of the fluorescent hydrogel in the fields of environmental monitoring and detection and biomedicine.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of functional materials, and in particular relates to the preparation of a composite fluorescent hydrogel and its application in the detection of iron ions in water. Background technique [0002] Metal cations are one of the main pollutants in the industrial production process. Once they enter the water body or soil, they are difficult to remove, and even cause permanent pollution. Metal cation pollution is cumulative, hysteresis and concealment. It is harmful to humans and other species. serious threat to health. Iron is widely used in industrial production and is an indispensable metal in people's lives. It is also one of the most important elements in the body's metabolism. Its deficiency and beyond the normal range will cause serious diseases. Although it has been developed A variety of methods for detecting iron ions have been proposed, but they all have the disadvantages...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08L33/26C08L71/02C08F220/56C08F220/32C08F222/38C09K11/06G01N21/64
CPCC08J3/075C08F220/56C09K11/06G01N21/643C09K2211/145C08J2333/26C08J2471/02C08F220/32C08F222/385Y02A20/20
Inventor 王沛吴启迪朱金妹
Owner DALIAN MARITIME UNIVERSITY
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