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Panchromatic fluorescent CaF2, furfural molecularly imprinted ratio fluorescence sensor prepared from CaF2 and preparation method thereof

A ratiometric fluorescence and molecular imprinting technology, which is applied in the fields of fluorescence/phosphorescence, chemical instruments and methods, calcium/strontium/barium halides, etc., can solve the problems of expensive instruments, cumbersome operation, and long cycle, and achieve rapid detection and preparation methods Simple operation, green and mild reaction conditions

Active Publication Date: 2020-07-03
GUANGDONG PHARMA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, using a higher temperature will form an important degradation product 5-hydroxymethylfurfural, which is allergenic, and its excess will cause certain damage to the human body. my country's honey industry standard (GH / T18796-2012 ) The qualified standard for 5-hydroxymethylfurfural content is below 40mg / kg
At present, the detection methods of 5-hydroxymethylfurfural mainly include spectrophotometry, high performance liquid chromatography, liquid chromatography-mass spectrometry, etc. Although these methods are accurate, the instruments are expensive, the operation is cumbersome, and the cycle is long , in comparison, the molecularly imprinted ratiometric fluorescent sensor has high selectivity, fast analysis speed, simple operation, and good visualization effect

Method used

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  • Panchromatic fluorescent CaF2, furfural molecularly imprinted ratio fluorescence sensor prepared from CaF2 and preparation method thereof
  • Panchromatic fluorescent CaF2, furfural molecularly imprinted ratio fluorescence sensor prepared from CaF2 and preparation method thereof
  • Panchromatic fluorescent CaF2, furfural molecularly imprinted ratio fluorescence sensor prepared from CaF2 and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A purple fluorescent CaF 2 Preparation of quantum dots:

[0037] 1) Dissolve 0.1110 g of anhydrous calcium chloride and 0.1260 g of sodium fluoride in 5 ml of deionized water respectively at room temperature, add the sodium fluoride aqueous solution dropwise to the anhydrous calcium chloride solution under vigorous stirring, and add dropwise Fully stir for 10 minutes after completion, then add 40 milliliters of absolute ethanol and 200 microliters of mercaptopropionic acid, continue to stir for 10 minutes, then transfer the mixed solution to an explosion-proof polytetrafluoroethylene container, and react for 6 hours at 120 ° C to obtain Contains CaF 2 A solution of quantum dots;

[0038] 2) will contain CaF 2 The solution of quantum dots was cooled to room temperature, and the product was centrifuged with a centrifuge, and washed three times with water and ethanol to obtain CaF 2 Quantum dot precipitation;

[0039] 3) CaF 2 The quantum dot precipitate was freeze-d...

Embodiment 2

[0041] A blue fluorescent CaF 2 Preparation of quantum dots:

[0042] 1) Dissolve 0.2220 g of anhydrous calcium chloride, 0.0926 g of ammonium fluoride and 0.2941 g of sodium citrate in 5 ml of deionized water at room temperature, and add the sodium citrate aqueous solution drop by drop to the anhydrous chloride In the calcium solution, fully stir for 10 minutes after the dropwise addition, then add the ammonium fluoride solution dropwise, continue to stir for 10 minutes, then add 60 ml of absolute ethanol and 200 microliters of mercaptopropionic acid, continue to stir for 10 minutes, and finally mix the The solution was transferred to an explosion-proof polytetrafluoroethylene container and reacted for 6 hours at 140°C to obtain 2 A solution of quantum dots;

[0043] 2) will contain CaF 2 The solution of quantum dots was cooled to room temperature, and the product was centrifuged with a centrifuge, and washed three times with water and ethanol to obtain CaF 2 Quantum dot ...

Embodiment 3

[0046] A green fluorescent CaF 2 Preparation of quantum dots:

[0047] 1) Dissolve 0.2220 g of anhydrous calcium chloride, 0.0370 g of ammonium fluoride and 0.4412 g of sodium citrate in 5 ml of deionized water at room temperature, and add the sodium citrate aqueous solution drop by drop to the anhydrous chloride In the calcium solution, fully stir for 10 minutes after the dropwise addition, then add the ammonium fluoride solution drop by drop, continue to stir for 10 minutes, then add 45 ml of absolute ethanol and 200 microliters of mercaptopropionic acid, continue to stir for 10 minutes, and finally mix the The solution was transferred to an explosion-proof polytetrafluoroethylene container and reacted for 10 hours at 140°C to obtain 2 A solution of quantum dots;

[0048] 2) will contain CaF 2 The solution of quantum dots was cooled to room temperature, and the product was centrifuged with a centrifuge, and washed three times with water and ethanol to obtain CaF 2 Quantu...

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Abstract

The invention provides panchromatic fluorescent CaF2, a furfural molecularly imprinted ratio fluorescence sensor prepared from CaF2 and a preparation method thereof. A CaF2 quantum dot is high in quantum yield, the preparation method is simple to operate, reaction conditions are mild, and colors emitted by the CaF2 quantum dot under excitation of a wavelength of 365 nm can be randomly selected from purple light, blue light, green light, yellow light and red light. On the basis, the CaF2 quantum dot is used as an external standard; and a red CdTe quantum dot is used as an internal standard to construct a molecularly imprinted ratio fluorescence sensor. The construction method is simple and convenient, errors are small, and the accuracy of detection results can be effectively improved. The sensor can be widely applied to the field of detection of 5-hydroxymethyl furfural and other furfural substances, has the advantages of rapid detection, high sensitivity, good specificity and satisfactory visual effect, and provides convenience for rapid visual detection and detection of 5-hydroxymethylfurfural in an actual sample. The invention relates to the fields of nano material science, environment, biological imaging, photo-electricity, medicine and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial science, in particular to a full-color fluorescent CaF 2 and using CaF 2 The prepared furfural molecularly imprinted ratiometric fluorescent sensor and its preparation method. Background technique [0002] Calcium Fluoride (CaF 2 ) is the main component of the fluorine mineral fluorite. It is one of the optical materials with the best comprehensive performance known at present. Because of its unique structural characteristics, its electrical, magnetic and optical properties have attracted people's attention, and it has been widely used as a functional material. The utilization of biotechnology has always occupied a very important position in the fields of industrial applications and scientific research, and its development prospects are even more impressive. [0003] In recent years, calcium fluoride (CaF 2 ) The preparation of nanomaterials has attracted the attention of many researchers...

Claims

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Application Information

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IPC IPC(8): C09K11/61C01F11/22G01N21/64B82Y20/00B82Y40/00
CPCC09K11/616G01N21/6428B82Y20/00B82Y40/00C01F11/22C01P2004/04C01P2006/60
Inventor 李康罗康
Owner GUANGDONG PHARMA UNIV
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