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A kind of immobilized rhodamine b-based fluorescence sensor and preparation method thereof

A fluorescence sensor and sensor technology, applied in the field of functional materials/biochemical sensing, can solve the problems of decreased specific surface area and pore volume of mesoporous molecular sieve immobilized fluorescence sensor, damaged carrier surface topography, and low structural stability, etc. Achieve good selective recognition effect, fast detection speed, and stable structure.

Active Publication Date: 2018-06-29
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the process of preparing immobilized rhodamine-based fluorescent sensors requires silylating reagents or noble metal nanoparticles as linkers, and the specific surface area and pore volume of the obtained mesoporous molecular sieve immobilized fluorescent sensors are significantly reduced.
Moreover, the immobilization process may also lead to the destruction of the surface morphology of the carrier or the collapse of the pore structure.
In addition, the preparation process of the carrier material mesoporous molecular sieve is complicated, requires the use of expensive templates, the production cost is high, and its structural stability is low. Therefore, it is urgent to develop a carrier material with stable structure and low cost for the preparation of immobilized rhodan. BenQ Fluorescence Sensor

Method used

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  • A kind of immobilized rhodamine b-based fluorescence sensor and preparation method thereof

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Effect test

Embodiment 1

[0047] Synthetic experiments were carried out in an oil bath. In a 250mL three-neck flask, completely dissolve 5.0g (10.46mmol) Rhodamine B in 180mL 40°C absolute ethanol, then quickly add 12.56g (209mmol) ethylenediamine liquid, slowly raise the oil bath to 85°C, The reaction was refluxed for 24 hours until the solution changed from fluorescent red to light yellow. After the reaction was complete, the solvent was removed by rotary evaporation to obtain a solid mixture, which was then extracted with 100 mL of dichloromethane and 100 mL of water, and the organic layer was repeatedly washed with deionized water (100 mL) five times to remove residual rhodamine B. Liquid separation to obtain an organic layer, anhydrous MgSO 4 After drying, filtering, and rotary evaporation to remove dichloromethane, a light orange crude product was obtained. Subsequently, it was recrystallized with acetonitrile and dried in a vacuum oven at 60° C. for 6 hours to obtain 3.23 g of a refined light ...

Embodiment 2

[0056] Synthetic experiments were carried out in an oil bath. In a 250mL three-neck flask, completely dissolve 5.0g (10.46mmol) Rhodamine B in 180mL 40°C absolute ethanol, then quickly add 12.56g (209mmol) ethylenediamine liquid, slowly raise the oil bath to 85°C, The reaction was refluxed for 24 hours until the solution changed from fluorescent red to light yellow. After the reaction was complete, the solvent was removed by rotary evaporation to obtain a solid mixture, which was then extracted with 100 mL of dichloromethane and 100 mL of water, and the organic layer was repeatedly washed with deionized water (100 mL) five times to remove residual rhodamine B. Liquid separation to obtain an organic layer, anhydrous MgSO 4 After drying, filtering, and rotary evaporation to remove dichloromethane, a light orange crude product was obtained. Subsequently, it was recrystallized with acetonitrile and dried in a vacuum oven at 60° C. for 6 hours to obtain 3.23 g of a refined light ...

Embodiment 3

[0063] Synthetic experiments were carried out in an oil bath. In a 250mL three-neck flask, completely dissolve 5.0g (10.46mmol) Rhodamine B in 180mL 40°C absolute ethanol, then quickly add 12.56g (209mmol) ethylenediamine liquid, slowly raise the oil bath to 85°C, The reaction was refluxed for 24 hours until the solution changed from fluorescent red to light yellow. After the reaction was complete, the solvent was removed by rotary evaporation to obtain a solid mixture, which was then extracted with 100 mL of dichloromethane and 100 mL of water, and the organic layer was repeatedly washed with deionized water (100 mL) five times to remove residual rhodamine B. Liquid separation to obtain an organic layer, anhydrous MgSO 4 After drying, filtering, and rotary evaporation to remove dichloromethane, a light orange crude product was obtained. Subsequently, it was recrystallized with acetonitrile and dried in a vacuum oven at 60° C. for 6 hours to obtain 3.23 g of a refined light ...

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Abstract

An immobilized rhodamine B-based fluorescent sensor and a preparation method thereof belong to the technical field of functional materials. The sensor has a regular layered structure, open and orderly interlayer channels, and a layer spacing of 3.1-3.3 nm. The rhodamine B-based fluorescent functional group has a high content and is monodispersely covalently grafted in the channel of the layered clay magadiite matrix. The preparation method of the material is as follows: the rhodamine B lactam silanized derivative is used as a fluorescent probe, and the rhodamine B-based fluorescent functional group is immobilized between the magadiite layers by an interlayer grafting method. The sensing material prepared by the present invention has a fast detection speed for mercury ions, a detection limit of 62ppb, good selectivity, and is not affected by other coexisting ions. Ammonium oxide treatment can be reused. The detection process of the mercury ion by the sensor is completely visible to the naked eye, easy to operate, and has great application prospects in the field of natural environment and biological living detection.

Description

technical field [0001] The invention belongs to the technical field of functional materials / biochemical sensing, and in particular relates to an immobilized rhodamine B-based fluorescent sensor and a preparation method thereof, a layered magadiite immobilized rhodamine B-based fluorescent sensor and a preparation method thereof. Background technique [0002] Mercury is one of the most toxic metal elements in ecosystems. Mercury ions will be transformed into highly toxic methylmercury under the action of microbial methylation, and methylmercury will be enriched through the food chain, thereby posing a serious threat to human health and the environment. Therefore, for Hg in the environment 2+ It is very important to detect and remove. Traditional Hg 2+ Detection methods include atomic emission spectrometry, atomic absorption spectrometry, and inductively coupled plasma mass spectrometry. Although the above method can effectively quantitatively detect Hg 2+ , but these ana...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
Inventor 张慧孙琦马跃文柴悦
Owner BEIJING UNIV OF CHEM TECH
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