Cd(II)MOF material based on 5-(4-[1,2,4]triazole-1-phenyl)-1H-tetrazole

A technology of phenyl and tetrazole, which is applied in the field of Cd metal organic framework (MOF) materials and its preparation, can solve the problems of limited sensitivity and selectivity, and achieve the effects of stable framework structure, strong fluorescence intensity and novel structure

Inactive Publication Date: 2019-12-31
ANYANG NORMAL UNIV
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Problems solved by technology

The control of pollutant discharge has become a hot spot at present. Therefore, there is an urgent need for a method for fast and efficient detection of pollutants. Among the current methods for detecting ions and small organic molecules in the environment, the fluorescence method has the advantages of short time, good selectivity, and high sensitivity. However, the sensitivity and selectivity of current fluorescent detection materials are still limited, and further improvement is needed

Method used

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  • Cd(II)MOF material based on 5-(4-[1,2,4]triazole-1-phenyl)-1H-tetrazole
  • Cd(II)MOF material based on 5-(4-[1,2,4]triazole-1-phenyl)-1H-tetrazole
  • Cd(II)MOF material based on 5-(4-[1,2,4]triazole-1-phenyl)-1H-tetrazole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of metal-organic frameworks:

[0035] 5-(4-[1,2,4]triazole-1-phenyl)-1H-tetrazole (0.05mmol, 11 mg) and CdCl 2 2.5H 2 The mixture of O (0.05mmol, 11 mg) was dissolved in 2 mL of DMF (N,N-dimethylformamide), and the pH value was adjusted to 2.0 by adding 0.5mol / L NaOH solution, sonicated until completely dissolved, and the The resulting solution was sealed in a reaction bottle at 100 o C was kept at a constant temperature in an electric blast drying oven for 48 hours, then naturally cooled to room temperature, washed with ethanol, and dried to obtain crystals of Cd(II) metal-organic framework materials; the yield was 30%.

[0036] IR (KBr pellet): 3292vs, 1650s, 1540m, 1520m, 1460m, 1420m, 1390s, 1320w, 1280m, 1210m, 1150m, 1100m, 1050m, 974m, 846s, 761m, 669m, 526w.

[0037] like figure 1 As shown, the infrared spectrum of the crystal of the Cd(II) metal-organic framework material obtained in this example shows characteristic absorption peaks of benzene ...

Embodiment 2

[0039] Preparation of metal-organic frameworks:

[0040] 5-(4-[1,2,4]triazole-1-phenyl)-1H-tetrazole (0.075mmol, 16.5 mg) and CdCl 2 2.5H 2 The mixture of O (0.05 mmol, 11 mg) was dissolved in 2 mL of DMF (N,N-dimethylformamide), and the pH value was adjusted to 4.0 by adding 0.5mol / L NaOH solution, sonicated until completely dissolved, and the resulting The solution was sealed in a reaction bottle at 110 o C was kept at a constant temperature in an electric blast drying oven for 60 hours, then naturally cooled to room temperature, washed with ethanol, and dried to obtain crystals of Cd(II) metal-organic framework materials; the yield was 30%.

Embodiment 3

[0042] X-ray single crystal diffraction test:

[0043]The single crystal of the Cd(II) metal-organic framework material obtained in Example 1 was tested on a Bruker APEX II CCD diffractometer, the test temperature was 293 K, and the Mo-Ka ray ( Wavelength l = 0.71073 Å) using ω-scan technology to determine unit cell parameters and collect data; the integration of diffraction lines was completed by SAINT program; semi-empirical absorption correction was performed by SADABS program; crystal structure analysis was completed by SHELXS program in SHELXTL software package, using After the direct method is solved, the SHELXL program is used for refinement; the position of the metal atom is determined by the E-map of the direct method, and the other non-hydrogen atoms are determined by the difference Fourier function method and the least square method, and then the anisotropy is carried out according to the thermal parameters Refining; finally, combined with thermodynamic parameters, ...

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Abstract

The invention discloses a Cd(II) metal organic framework material based on 5-(4-[1,2,4]triazole-1-phenyl)-1H-tetrazole, a preparation method and application thereof. The metal organic framework material is prepared by taking 5-(4-[1,2,4]triazole-1-phenyl)-1H-tetrazole and CdCl2.2.5H2O as raw materials througha solvothermal method; the molecular formula of the metal organic framework is [Cd(L)2(H2O)2]n, wherein L is a ligand 5-(4-[1,2,4]triazole-1-phenyl)-1H-tetrazole; and when the metal organic framework material is used for the detection of nitrobenzene (NB), acetone (ACE), iron ions (Fe<3+>)and dichromate ions (Cr2O7<2->) as a fluorescent sensing material, high sensitivity is shown.

Description

technical field [0001] The invention belongs to the technical field of metal organic framework materials, in particular to a Cd(II) metal organic framework (MOF) based on 5-(4-[1,2,4]triazole-1-phenyl)-1H-tetrazole ) materials and their preparation methods and applications. Background technique [0002] At present, with the rapid development of human society and industry and agriculture, environmental problems are caused, especially the release of a large number of harmful ions and organic small molecules and other harmful pollutants, which pose a threat to human health and life. The control of pollutant discharge has become a hot spot at present. Therefore, there is an urgent need for a method for fast and efficient detection of pollutants. Among the current methods for detecting ions and small organic molecules in the environment, the fluorescence method has the advantages of short time, good selectivity, and high sensitivity. However, the sensitivity and selectivity of c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C09K11/06G01N21/64
CPCC08G83/008C09K11/06C09K2211/1007C09K2211/1059C09K2211/1074C09K2211/188G01N21/643G01N2021/6432
Inventor 王军杰马志敏李雷张有娟张仁春张道军
Owner ANYANG NORMAL UNIV
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