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A preparation method and application of a ratiometric fluorescence sensor based on f-pda molecular imprinting

A ratiometric fluorescence and molecular imprinting technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of long pretreatment time, cumbersome and time-consuming operation, poor method stability, etc., and achieve low cost of raw materials, high fluorescence efficiency, dispersion uniform effect

Active Publication Date: 2022-04-26
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the technical defects existing in the prior art, such as: cumbersome and time-consuming operation in the process of detecting p-nitrophenol, long pretreatment time, poor method stability and expensive and sophisticated instruments, etc.

Method used

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  • A preparation method and application of a ratiometric fluorescence sensor based on f-pda molecular imprinting
  • A preparation method and application of a ratiometric fluorescence sensor based on f-pda molecular imprinting
  • A preparation method and application of a ratiometric fluorescence sensor based on f-pda molecular imprinting

Examples

Experimental program
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Effect test

Embodiment 1

[0039] (1) Preparation of organic fluorescent nanomaterials (F-PDA):

[0040] Dissolve 100mg of dopamine hydrochloride and 0.1mL of polyethyleneimine in 20mL of deionized water, ultrasonically disperse evenly, and let stand at room temperature for 3.0h; finally adjust the pH to 7.0 with 1.0M dilute hydrochloric acid, filter, freeze-dry, and add 3.0mL to Deionized water was dissolved to obtain F-PDA solution, which was set aside.

[0041] (2) Preparation of cadmium telluride quantum dots coated with silicon (CdTe QDs@SiO 2 ):

[0042] Add 7.5mL of cyclohexane, 1.8mL of n-hexanol and 1.77mL of Triton X-100 into a 25mL flask, stir it evenly with magnetic force at 800rpm / min at room temperature, then add 1.0mL of cadmium telluride quantum solution, and stir for 30min. Add 200 μL H 2 O and 120μL ammonia water, stirred for 30min. Add 50 μL TEOS dropwise, and react for 24 hours in the dark. After the reaction, use the same amount of acetone as the total volume of cyclohexane, n-...

Embodiment 2

[0047] (1) Preparation of organic fluorescent nanomaterials (F-PDA):

[0048] Dissolve 100mg of dopamine hydrochloride and 0.1mL of polyethyleneimine in 20mL of deionized water, ultrasonically disperse evenly, and let stand at room temperature for 3.0h; finally adjust the pH to 7.0 with 1.0M dilute hydrochloric acid, filter, freeze-dry, and add 3.0mL to Deionized water was dissolved to obtain F-PDA solution, which was set aside.

[0049] (2) Preparation of cadmium telluride quantum dots coated with silicon (CdTe QDs@SiO 2 ):

[0050] Add 7.5mL of cyclohexane, 1.8mL of n-hexanol and 1.77mL of Triton X-100 into a 25mL flask, stir it evenly with magnetic force at 800rpm / min at room temperature, then add 1.0mL of cadmium telluride quantum solution, and stir for 30min. Add 400 μL H 2 O and 240μL ammonia water, stirred for 30min. 100 μL TEOS was added dropwise and reacted for 24 hours in the dark. After the reaction, use the same amount of acetone as the total volume of cyclohe...

Embodiment 3

[0057] (1) Preparation of organic fluorescent nanomaterials (F-PDA):

[0058] Dissolve 100mg of dopamine hydrochloride and 0.1mL of polyethyleneimine in 20mL of deionized water, ultrasonically disperse evenly, and let stand at room temperature for 3.0h; finally adjust the pH to 7.0 with 1.0M dilute hydrochloric acid, filter, freeze-dry, and add 3.0mL to Deionized water was dissolved to obtain F-PDA solution, which was set aside.

[0059] (2) Preparation of cadmium telluride quantum dots coated with silicon (CdTe QDs@SiO 2 ):

[0060] Add 7.5mL of cyclohexane, 1.8mL of n-hexanol and 1.77mL of Triton X-100 into a 25mL flask, stir it evenly with magnetic force at 800rpm / min at room temperature, then add 1.0mL of cadmium telluride quantum solution, and stir for 30min. Add 600 μL H 2 O and 360μL ammonia water, stirred for 30min. 150 μL TEOS was added dropwise and reacted for 24 hours in the dark. After the reaction, use the same amount of acetone as the total volume of cyclohe...

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Abstract

The invention belongs to the technical field of preparation of novel nanomaterials, and discloses a preparation method and application of a ratiometric fluorescence sensor based on F-PDA molecular imprinting. The present invention prepares the organic fluorescent nano-material F-PDA by a simple method, secondly prepares the cadmium telluride quantum dot-coated silicon by the inverse microemulsion method, and finally prepares the F-PDA molecularly imprinted ratiometric fluorescence sensor by the method of precipitation polymerization, and establishes a A simple, green and cheap synthetic method. In addition, F-PDA is used as a fluorescent functional monomer to participate in the polymerization, which speeds up the response time of the target. The prepared F-PDA molecularly imprinted ratiometric fluorescent sensor has a series of advantages such as simple preparation method, low cost, strong stability and good optical performance. Advantages, and can be used for highly sensitive and selective identification and detection of p-nitrophenol, to achieve qualitative, quantitative and visual detection of p-nitrophenol in environmental water.

Description

technical field [0001] The invention belongs to the field of preparation of novel nanometer materials, and relates to a preparation method and application of a ratiometric fluorescence sensor based on F-PDA molecular imprinting. Background technique [0002] p-Nitrophenol (p-Nitrophenol, referred to as P-NP) is an important raw material in the chemical industry and an important intermediate in the production of chemical products. It is widely used in pharmaceutical manufacturing, dye manufacturing, leather preservatives, and pesticide intermediates. body and other fields. As one of the main pollutants in industrial wastewater, p-nitrophenol has many hazards such as high toxicity, high pathogenicity, and weak biodegradability. Major hazards, such as headache, fever, blood vessel, musculoskeletal, liver and kidney damage, etc. Therefore, it is very urgent for the content determination of p-nitrophenol no matter to human health or environmental protection. In recent years, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/88C09K11/06C09K11/02C08F283/00C08F292/00C08F222/14
CPCC09K11/883C09K11/06C09K11/025C08F283/00C08F292/00C08F222/102
Inventor 徐叶青马明树彭龙黄婷闫永胜
Owner JIANGSU UNIV