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Double rare earth organic framework material with multiple detection properties and its preparation method

An organic framework, dual rare earth technology, applied in luminescent materials, organic chemistry, material analysis by observing the effect on chemical indicators, etc., can solve the problems of single temperature or pH sensing function, inability to detect biological temperature, etc. The effect of predictable topology, high yield and simple preparation method

Active Publication Date: 2016-04-13
浙江富昇科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the detection of biological cells is mainly new fluorescent temperature sensing materials, including complexes, organic molecules, inorganic glasses, inorganic-organic hybrid materials, etc., but the temperature and pH fluorescent sensing materials currently reported only have a single Temperature or pH sensing function, cannot detect biological temperature and pH at the same time

Method used

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  • Double rare earth organic framework material with multiple detection properties and its preparation method
  • Double rare earth organic framework material with multiple detection properties and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0022] 1) Dissolve a total molar mass of 0.05 mmol of europium nitrate and terbium nitrate in 1 mL of deionized water, the molar ratio of europium nitrate and terbium nitrate is 2:8, and prepare a rare earth metal salt solution with a total molar concentration of 0.05 mol / L.

[0023] 2) Dissolve 0.05 mmol of 4-(3,5-isophthalic acid)-2,6-pyridinedicarboxylic acid and 40 μL of concentrated acid in 8 mL of deionized water to obtain a ligand solution. In the ligand solution, 4-( The concentration of 3,5-isophthalic acid)-2,6-pyridinedicarboxylic acid is 0.006125 mol / L, and the volume ratio of concentrated acid to deionized water is 0.008.

[0024] 3) Mix the rare earth metal salt solution in step 1) and the ligand solution in step 2) in a 25mL reactor, seal it and keep it in an oven at 120°C for 2 days, naturally cool to room temperature, and filter to obtain a double rare earth organic compound. Frame material Eu 0.205 Tb 0.795 L (L is 4-(3,5-isophthalic acid)-2,6-pyridinedicar...

Embodiment 2

[0030] 1) Europium chloride and terbium chloride with a total molar mass of 0.2 mmol are dissolved in 1 mL of deionized water, the molar ratio of europium chloride and terbium chloride is 1:9, and a total molar concentration of 0.2 mol / L is prepared. Rare earth metal salt solution.

[0031] 2) Dissolve 0.2 mmol of 3-(3,5-isophthalic acid)-2,6-pyridinedicarboxylic acid and 100 μL of concentrated acid in 10 mL of N,N-dimethylacetamide to obtain a ligand solution, and prepare The concentration of 3-(3,5-isophthalic acid)-2,6-pyridinedicarboxylic acid in the solid solution is 0.02mol / L, and the volume ratio of the concentrated acid to the organic solvent N,N-dimethylacetamide is 0.01.

[0032] 3) Mix the rare earth metal salt solution in step 1) and the ligand solution in step 2) in a reaction kettle, seal it and keep it in an oven at 160°C for 3 days, cool it down to room temperature naturally, and filter to obtain colorless transparent crystals double rare earth organic framew...

Embodiment 3

[0035]1) Dissolve europium acetate and terbium acetate with a total molar mass of 0.01 mmol in 1 mL of deionized water, the molar ratio of europium acetate and terbium acetate is 1:1, and prepare a rare earth metal salt solution with a total molar concentration of 0.01 mol / L .

[0036] 2) Dissolve 0.01 mmol of 6-(3,5-isophthalic acid)-2,4-pyridinedicarboxylic acid and 25 μL of concentrated acid in 10 mL of a 1:1 mixture of N, N-dimethylacetamide and ethanol The ligand solution is obtained in the ligand solution, the concentration of the organic ligand in the ligand solution is 0.001mol / L, and the volume ratio of the concentrated acid to the organic solvent is 0.0025.

[0037] 3) Mix the rare earth metal salt solution in step 1) and the ligand solution in step 2) in a reaction kettle, seal it and keep it in an oven at 80°C for 1 day, cool it down to room temperature naturally, and filter to obtain colorless transparent crystals double rare earth organic framework material Eu ...

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Abstract

The double rare earth organic framework material with biological temperature and pH multiple detection performance disclosed by the present invention is composed of EuxTb1-xLn, where 0.1≤x≤0.5, n=1~3, and L contains both phthalic acid groups and Organic ligands for dipicolinic acid groups. The double rare earth organic framework material is synthesized by a hydrothermal method, and the synthesis method has simple process, mild conditions, readily available raw materials and high yield. The product has the characteristic luminescence peaks of rare earth europium and terbium at the same time, and the intensity ratio of the two peaks IEu / ITb shows a good exponential relationship with pH, ​​which can detect the pH value of the solution, and the pH range is 3.9-7.5; in a fixed pH environment, it can It responds to temperature changes and shows a good linear relationship with temperature, and the temperature range is 25°C-50°C. The material of the invention has the detection ability of biological temperature and pH, fast response speed, high sensitivity, strong anti-interference ability, and effectively realizes self-calibration.

Description

technical field [0001] The invention relates to a double rare earth organic framework material and a preparation method thereof, in particular to a double rare earth organic framework material with multiple detection performances of biological temperature and pH and a preparation method thereof. Background technique [0002] Temperature and pH are two common and very important physical parameters, and various instruments and materials have been designed and invented for their detection. In the field of temperature detection, as a new type of temperature detection method, the optical temperature detection of materials such as metal organic framework materials has broken through the shortcomings of traditional temperature detection such as narrow measurement range and slow response speed, and can detect special conditions such as extremely low temperature environments or biological internal environments. environment, and can respond to temperature through fluorescence intensit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F5/00C09K11/06G01K11/32G01N21/80
Inventor 崔元靖张格格邹文峰郁建灿杨雨王智宇钱国栋
Owner 浙江富昇科技有限公司
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