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POSS-rheinic acid fluorescent probe for detecting magnesium ions and preparation method thereof

A technology of fluorescent probe and rhein, which is applied in the field of chemical detection, can solve problems such as interference of detection results, and achieve the effects of simple preparation method, strong anti-interference ability, good selectivity and sensitivity

Active Publication Date: 2020-02-28
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most magnesium ion fluorescent probe molecules require complex organic synthesis processes, and their detection results are often interfered by coexisting calcium ions.

Method used

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  • POSS-rheinic acid fluorescent probe for detecting magnesium ions and preparation method thereof
  • POSS-rheinic acid fluorescent probe for detecting magnesium ions and preparation method thereof
  • POSS-rheinic acid fluorescent probe for detecting magnesium ions and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: the preparation of POSS-rhein (POSS-Rh)

[0038] 1) POSS-NH 2 The preparation and characterization of

[0039] POSS-NH 2 Prepare as shown below:

[0040]

[0041] Add 360mL of methanol to a 1000mL three-neck flask, add 15mL of γ-aminopropyltriethoxysilane and 30mL of hydrochloric acid under magnetic stirring, heat to reflux at 90°C for 18h, then add 250mL of tetrahydrofuran, the solution immediately becomes cloudy, and a white precipitate forms. The product was evacuated, filtered, and washed with tetrahydrofuran to obtain white microcrystals; dried in a vacuum oven at 40°C for 24 hours to obtain 3.14 g of white microcrystalline solids, namely POSS-NH 3 Cl. The product is treated with anion exchange resin AmberliteIRA-400 to obtain POSS-NH 2. This product should be used during storage or immediately prepared in methanol. Resin treatment method: Take the anion resin and wash it successively with NaOH aqueous solution (3×200mL), water (6×200mL) and...

Embodiment 2

[0055] Embodiment 2: POSS-Rh is to the detection of magnesium ion

[0056] 1) Selectivity test of POSS-Rh to magnesium ions

[0057] In order to investigate the effect of different metal ions on the fluorescence emission intensity of POSS-Rh, the salt solutions of different metals (Co 2+ , Li + , K + , Na + , Ni 2+ , Cd 2+ , Mg 2+ , Fe 3+ , Fe 2+ , Mn 2+ , La 2+ , Cu 2+ , Ca 2+ , Zn 2+ ) into 10 -3 mol L -1 of aqueous solution. During the test, 3 mL of POSS-Rh solution was added to the fluorescent cup, and a small volume of different metal salt solutions (excitation wavelength was 430 nm) were respectively added thereto.

[0058] Detect the change of the fluorescence emission spectrum, examine the selectivity of POSS-Rh to different ions, the results are as follows Figure 7 shown. from Figure 7 It can be seen from the figure that after adding magnesium ions to POSS-Rh, the fluorescence intensity is enhanced, resulting in an obvious fluorescence response; w...

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Abstract

The invention discloses a POSS-rheinic acid fluorescent probe for detecting magnesium ions and a preparation method thereof, and belongs to the technical field of chemical detection. The preparation method comprises following steps: dissolving POSS-NH3Cl powder into methanol; making the solution go through an anion resin column to obtain a POSS-NH2 methanol solution; then adding rheinic acid intothe POSS-NH2 methanol solution, carrying out reactions at a room temperature under stirring, until the color of the reaction solution becomes orange from a yellow color; carrying out dialysis by usinga dialysis bag, and after dialysis, using a rotary evaporator to evaporate the solvent to obtain purple powder namely the POSS-rheinic acid fluorescent probe, which has the advantages that the magnesium ion selectivity and sensitivity are high, and the fluorescent probe is environmentally friendly and nontoxic and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of chemical detection, and more specifically relates to a POSS-rhein fluorescent probe for detecting magnesium ions and a preparation method thereof. Background technique [0002] Magnesium is an essential mineral element for the human body, and one of the important ions for maintaining nerve, muscle and heart stress. Because magnesium is abundant in the human body, it is considered a constant element. The total magnesium content of a normal adult body is about 25 grams, of which 60%-65% exists in bones and teeth, and 27% is distributed in soft tissues. Magnesium is mainly distributed in the cells, and the magnesium in the extracellular fluid does not exceed 1%. Its main physiological function is to activate the activity of various enzymes in the human body; maintain bone growth and neuromuscular excitability; the main role of magnesium is to participate in the regulation of the activity of various enzymes,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/388C09K11/06G01N21/64
CPCC08G77/045C09K11/06G01N21/6402G01N21/64G01N21/6456G01N21/6486C09K2211/1491G01N2021/6417
Inventor 徐莉姜维娜
Owner NANJING FORESTRY UNIV
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