Two-dimensional cadmium organic framework coordination compound and preparation method and application thereof

A technology of organic frameworks and complexes, applied in the field of transition metal complexes, achieving the effects of high yield, low cost, and simple preparation methods

Active Publication Date: 2018-04-20
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

1-(4-benzoyl)-1H-benzimidazole-5,6-dicarboxylic acid, because it contains three carboxyl groups, can be fully deprotonated or partially deprotonated to construct various MOFs with metals, while the bare Nitrogen atoms may have the ability to recognize metals and can be used as fluorescent probes to recognize metal ions. So far, transition metals and 1-(4-benzoyl)-1H-benzimidazole-5,6-dicarboxylic acid The constructed complex has not been reported yet

Method used

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  • Two-dimensional cadmium organic framework coordination compound and preparation method and application thereof
  • Two-dimensional cadmium organic framework coordination compound and preparation method and application thereof
  • Two-dimensional cadmium organic framework coordination compound and preparation method and application thereof

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Experimental program
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Embodiment 1

[0019] Embodiment 1. Complex of the present invention [Cd (μ 5 -Hcbic)] n preparation method

[0020] Weigh 0.05mmolH 3 cbic with 0.1mmol CdCl 2 2.5H 2 O was placed in a 10ml Teflon tube, and 4ml H was added 2 O and 3ml CH 3 CN, stirred at room temperature for 30 minutes. Then the polytetrafluoroethylene tube was sealed in a stainless steel reaction kettle, the temperature was controlled at 160°C and heated for 72 hours, and it was naturally lowered to room temperature to obtain colorless blocky crystals, which were washed three times with distilled water and dried in vacuum. The yield of the obtained cadmium complex was was 63%. Elemental analysis: theoretical value: C 45.26, H 2.22, N 6.21; experimental value: C 45.35, H 2.17, N 6.29.

Embodiment 2

[0021] Embodiment 2. Complexes of the present invention [Cd (μ 5 -Hcbic)] n crystal structure of

[0022] The crystal structure was determined using the Beijing Synchrotron Radiation 1W2B working line station light source For the incident radiation, the MAR165CCD detector, MARCCD and HKL2000 programs collect and restore the data and unit cell parameters, and use the SHELXL-97 direct method and least square method to correct the coordinates of each atom from the difference Fourier electron density map, and use Lorentz and polarization effect correction, and finally solved the crystal structure ( figure 1 ). C and O atoms are hydrogenated using theory. The detailed crystal determination data are shown in Table 1.

[0023] Crystallographic data of the complexes in Table 1

[0024]

[0025]

Embodiment 3

[0026] Embodiment 3. Complexes of the present invention [Cd (μ 5 -Hcbic)] n phase analysis of

[0027] X-ray powder diffraction such as figure 2 As shown, the experimental diffraction pattern is consistent with the powder diffraction pattern simulated based on the crystal structure, indicating that the crystal sample is homogeneous.

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Abstract

The invention discloses a two-dimensional cadmium organic framework coordination compound and a preparation method and application thereof. The two-dimensional cadmium organic framework coordination compound adopts a chemical formula as follows: [Cd([mu]5-Hcbic)]n, in which H3cbic is 1-(4-benzoyl)-1H-benzimidazole-5,6-dicarboxylic acid. The preparation method comprises the following steps: addingH3cbic and cadmium chloride according to a molar ratio of 1:2 into H2O and CH3CN according to a volume ratio of 4:3, stirring for 30 minutes at room temperature, and reacting for 72 hours in a sealedreaction kettle at 160 DEG C to obtain colorless bulk crystals, with the yield of 63%. The two-dimensional cadmium organic framework coordination compound adopts a two-dimensional framework structure,in which cadmium ions adopt a six-coordinated mode. In an aqueous solution, under excitation of 230nm wavelength light, Fe<3+> can quench fluorescence of the two-dimensional cadmium organic frameworkcoordination compound, so that the two-dimensional cadmium organic framework coordination compound can be used as a fluorescent probe for detecting the Fe<3+>.

Description

technical field [0001] The invention relates to a transition metal complex, specifically a two-dimensional cadmium organic framework complex and a preparation method thereof, and the complex is effective in recognizing Fe 3+ in the application. Background technique [0002] In recent years, since some metal ions and some volatile organic gases pose a serious threat to humans and the environment, finding an effective detection method is a hot topic of recent research, among which Fe 3+ It is one of the essential elements for the human body. It has the function of carrying and transporting oxygen in the cells. However, excessive iron will cause hemoglobin deposition in the cells and cause diseases such as kidney failure, anemia, and liver insufficiency. Therefore, it is necessary to design an effective and effective and rapid detection of Fe 3+ The method is very important, among which fluorescence detection is a kind of detection method with high sensitivity and selectivity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C07D235/06C08G83/00G01N21/64
CPCC07B2200/13C07D235/06C08G83/008C09K11/06C09K2211/188G01N21/643G01N2021/6432
Inventor 李芬芳卢丽萍朱苗力
Owner SHANXI UNIV
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