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Fluorescent sensor for magnesium ions and preparation method thereof

A fluorescence sensor, magnesium ion technology, applied in fluorescence/phosphorescence, material excitation analysis, etc., can solve the problem of weak research on thin film fluorescence sensor, improve thermal stability and pH applicable range, not easy to age, maintain optical stability. Effect

Inactive Publication Date: 2011-05-11
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, the research on thin-film fluorescent sensors is still very weak, and most of the research is still in the research stage.

Method used

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  • Fluorescent sensor for magnesium ions and preparation method thereof
  • Fluorescent sensor for magnesium ions and preparation method thereof
  • Fluorescent sensor for magnesium ions and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] a. Preparation of hydrotalcite precursor: adopt hydrothermal method, weigh 53.55g Zn(NO 3 ) 2 ·6H 2 O and 33.75gAL(NO 3 ) 3 9H 2 O dissolved in 100ml to remove CO 2 Prepare a saline solution in water; another 21.6g NaOH is dissolved in 100ml to remove CO 2 Prepare NaOH solution in water; add the salt solution and NaOH solution into a high-speed stirring colloid mill and stir for 1 minute to obtain a slurry; place the slurry in a pressure melting bomb, react at 110°C for 10 hours, and centrifuge and wash the product; The chemical formula of the prepared hydrotalcite precursor is Zn 2 Al(OH) 6 (NO 3 )·6H 2 O;

[0024] b. the preparation concentration is 1-naphthylamine-3,6,8-trisulfonic acid solution of 3g / L, after adjusting the pH value of the solution with sodium hydroxide to be 6.5, add the hydrotalcite precursor prepared by 0.5g step a, in N 2 Stir under protection, react at 25°C for 48 hours, the product uses CO 2 Washing with water and centrifuging to ob...

Embodiment 2

[0036] a. with the step a of embodiment 1;

[0037] b. the preparation concentration is 1-naphthylamine-3,6,8-trisulfonic acid solution of 5g / L, and the hydrotalcite precursor that 0.8g step a prepares after adding the hydrotalcite precursor of 0.8g step a with sodium hydroxide regulator solution pH value, in N 2 Stir under protection, react at 28°C for 48 hours, the product uses CO 2 Washing with water and centrifuging to obtain 1-naphthylamine-3,6,8-trisulfonic acid intercalated hydrotalcite;

[0038] c. Take 1 g of the 1-naphthylamine-3,6,8-trisulfonic acid intercalated hydrotalcite prepared in step b, dissolve it in 80 ml of ethanol solution and sonicate for 6 minutes, put the mixed solution in a high-speed centrifuge, and set the speed at 7500 rpm / min, centrifuged for 6 minutes, and took the upper colloidal solution;

[0039] d. Take 20ml of the upper colloidal solution obtained in step c and place it in the electrochemical deposition liquid pool. 2 The conductive gla...

Embodiment 3

[0041] a. with the step a of embodiment 1;

[0042] b. the preparation concentration is 1-naphthylamine-3,6,8-trisulfonic acid solution of 8g / L, the hydrotalcite precursor that 0.2g step a prepares after adding the hydrotalcite precursor of 0.2g step a with sodium hydroxide regulator solution pH value, in N 2 Stir under protection, react at 30°C for 48 hours, the product uses CO 2 Washing with water and centrifuging to obtain 1-naphthylamine-3,6,8-trisulfonic acid intercalated hydrotalcite;

[0043] c. Take 1 g of 1-naphthylamine-3,6,8-trisulfonic acid intercalated hydrotalcite prepared in step b, dissolve it in 90 ml of ethanol solution and sonicate for 12 minutes, put the mixed solution in a high-speed centrifuge, and set the speed at 7500 rpm / min, centrifuged for 9 minutes, and got the upper colloidal solution;

[0044] d. Take 20ml of the upper colloidal solution obtained in step c and place it in the electrochemical deposition liquid pool. 2 The conductive glass FTO s...

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Abstract

The invention discloses a fluorescent sensor for magnesium ions, which is made of an organic-inorganic composite material, and a preparation method thereof, and belongs to the technical field of fluorescent sensor preparation. Due to exchangeability of anions among hydrotalcite layers, 1-naphthylamine-3,6,8-trisulfonic acid is inserted among the hydrotalcite layers through an ion exchange method, a film is prepared by an electrochemical deposition method, and the fluorescence response of a film sensor to the magnesium ions is examined. In the prepared fluorescent sensor for the magnesium ions, the hydrotalcite is nontoxic and stable, and has high biocompatibility; different from a polymer carrier, an inorganic laminate of the hydrotalcite is difficult to age and can be stored for a long time so as to keep the optical stability of fluorescent ions and obviously improve the thermal stability of the fluorescent ions; and the sensor has high selectivity for the magnesium ions, shows a linear relationship in a certain range, and has repeated operability.

Description

technical field [0001] The invention belongs to the technical field of fluorescence sensor preparation, and in particular provides an organic-inorganic composite material as a magnesium ion fluorescence sensor and a preparation method thereof. Background technique [0002] Fluorescence sensors have attracted people's attention due to their high sensitivity, rich signal collection and convenient use, and have been developed rapidly in recent years. Fluorescence sensors are mainly divided into two categories, namely, homogeneous fluorescence sensors used in solution and thin-film fluorescence sensors that are easily reusable and capable of gas-phase sensing. In recent years, research on thin-film fluorescence sensors has received special attention. [0003] Borrowing the principle of homogeneous fluorescent chemical sensors, designing and preparing thin-film fluorescent sensors is an effective way to push fluorescent sensors to practical applications or expand their applicati...

Claims

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Application Information

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IPC IPC(8): G01N21/64
Inventor 靳兰郭志洁何丹丹卫敏
Owner BEIJING UNIV OF CHEM TECH
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