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eu‑mofs/cds two-color fluorescent material and its preparation and application

A two-color fluorescence, eu-mofs technology, applied in luminescent materials, fluorescence/phosphorescence, material excitation analysis, etc., can solve problems such as unsatisfactory sensitivity of fluorescence sensors, and achieve the effects of convenient post-processing, simple synthesis route, and low cost investment.

Inactive Publication Date: 2017-04-12
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, fluorescent materials such as rhodamine, allyl acridine orange, naphthalimide and their derivatives all have good responses to water, and sensors prepared based on these dyes have also achieved good results in the detection of water content. However, the current fluorescent sensors still have the disadvantage of unsatisfactory sensitivity

Method used

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  • eu‑mofs/cds two-color fluorescent material and its preparation and application
  • eu‑mofs/cds two-color fluorescent material and its preparation and application
  • eu‑mofs/cds two-color fluorescent material and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 26 mL of DMF, 2 mL of cyclohexanol and 2 mL of distilled water were mixed as solvent; 33.8 mg of europium nitrate (Eu(NO 3 ) 3 ), 21 mg H 3 BTC and 2.4 mg of carbon-based quantum dots co-doped with nitrogen and sulfur elements (N,S-CDs) were dissolved in the obtained solvent; after the dissolution was uniform, 0.1 mL of dibutylamine and 0.15 mL of HNO 3Adjust the pH value of the solution to 5; stir the prepared mixed solution at room temperature for 2 h, put the mixed solution in an oven, heat to 85 °C under normal pressure and keep the reaction for 16 h; centrifuge after the reaction, the obtained precipitate Washed with DMF and ethanol in sequence, centrifuged three times, and vacuum-dried at 80 ℃ for 5 hours to prepare Eu-MOFs / N,S-CDs two-color fluorescent material, which is based on rare earth metal-organic framework complex-carbon-based quantum dot organic solvent water content fluorescence Colorimetric sensor.

Embodiment 2

[0037] Mix 18 mL of DMF, 6 mL of cyclohexanol, and 6 mL of distilled water as a solvent; 2.6 mg of europium chloride (EuCl 3 ), 2.1 mg H 3 BTC and 0.3 mg of carbon-based quantum dots co-doped with nitrogen and sulfur elements (N,S-CDs) were dissolved in the obtained solvent; after the dissolution was uniform, 0.003 mL of dibutylamine and 0.3 mL of HNO 3 Adjust the pH value of the solution to 4; stir the prepared mixed solution at room temperature for 0.5 h, put the mixed solution in an oven, heat it to 60 °C under normal pressure, and keep the reaction for 48 h; centrifuge after the reaction, the obtained The precipitate was washed with DMF and ethanol in sequence, centrifuged three times, and then vacuum-dried at 50 ℃ for 5 hours to obtain Eu-MOFs / N,S-CDs two-color fluorescent material, which is based on the organic solvent water content of rare earth metal organic framework complex-carbon-based quantum dots Fluorescent colorimetric sensor.

Embodiment 3

[0039] 27 mL of DMF, 2.7 mL of cyclohexanol and 0.3 mL of distilled water were mixed as solvent; 446 mg of europium nitrate hexahydrate (Eu(NO 3 ) 3 ·6H 2 O), 210 mg H 3 BTC and 24 mg of carbon-based quantum dots co-doped with nitrogen and sulfur elements (N,S-CDs) were dissolved in the obtained solvent; after the dissolution was uniform, 0.3 mL of dibutylamine and 0.03 mL of HNO 3 Adjust the pH value of the solution to 6; stir the prepared mixed solution at room temperature for 5 h, then transfer the mixed solution to a hydrothermal reactor with a polytetrafluoroethylene liner and heat it to 100 °C, and keep it for 2 h; After centrifugation, the obtained precipitate was washed with DMF and ethanol in turn, and after centrifugation three times, it was vacuum-dried at 100 ℃ for 2 hours to obtain Eu-MOFs / N,S-CDs two-color fluorescent material, which is based on rare earth metal organic framework complex-carbon-based quantum Fluorescent colorimetric sensor for water content in...

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Abstract

The invention discloses a bicolor Eu-MOFs / CDs fluorescent material as well as preparation and an application thereof. Europium ions, trimesic acid and carbon quantum dots are used as raw materials, and the bicolor fluorescent material is prepared through heat treatment in a solvent prepared by mixing N,N-dimethylformamide, distilled water and cyclohexanol. Under irradiation of ultraviolet lamps, the material can emit red fluorescence when dispersed in organic solvents and can emit blue fluorescent when dispersed in water, so that fluorescent colorimetric sensors for measuring water content in organic solvents can be prepared from the material, the prepared sensors are high in sensitivity, good in stability and low in cost and have higher population value and brighter application prospect.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a Eu-MOFs / CDs two-color fluorescent material and a preparation method and application thereof. Background technique [0002] Metal-organic framework compounds (Metal-Organic Framworks, MOFs) is the fastest-growing direction of coordination chemistry in the past ten years, and it is a new scientific research topic involving inorganic chemistry, organic chemistry and coordination chemistry. MOFs generally refer to crystalline materials with periodic grid structures formed by the connection of inorganic clusters and organic ligands. MOFs are mostly composed of carboxylic acid organic ligands and metal ions. This kind of material has high porosity, large adsorption capacity, good thermal stability, various organic and inorganic components in its structure, and relatively simple synthesis method. As an important class of hybrid inorganic-organic materials, MOFs have a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06C09K11/65G01N21/64
Inventor 董永强池毓务蔡建华
Owner FUZHOU UNIV
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