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InIII-based metal organic anion framework and application thereof

An anionic framework, metal-organic technology, applied in 3/13 groups of organic compounds without C-metal bonds, organic chemistry, other chemical processes, etc., can solve the problem of limited research on MOFs, and achieve simple preparation methods and great application prospects. Effect

Active Publication Date: 2015-05-27
芜湖启博知识产权运营有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with neutral frameworks, research on anionic MOFs is very limited

Method used

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  • InIII-based metal organic anion framework and application thereof
  • InIII-based metal organic anion framework and application thereof
  • InIII-based metal organic anion framework and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 is based on In III metal organic anion framework

[0019] 0.16mmol of In(NO 3 ) 3 , 0.15mmol of 2,3′,5,5′-biphenyltetracarboxylic acid, 1ml of N,N’-dimethylformamide (DMF), 0.5ml of ethanol, 0.5ml of water, 0.05ml of concentrated Nitric acid was added into a glass bottle with a volume of 5 ml, and stirred at room temperature for 20 minutes. Seal the glass bottle and place in the oven. Heat to bring the temperature of the oven to 105°C and maintain the temperature at this condition for 72 hours. at 5℃·h -1 The cooling rate was slowly cooled to room temperature to obtain colorless transparent rod-shaped crystals; washed, filtered and dried, the target product was based on In III metal-organic anion framework in 70% yield.

[0020] The present invention synthesizes based on In III The metal-organic anion framework of the obtained structure diagram is shown in figure 2 Shown (obtain data through X-ray single crystal diffractometer test). Based on III T...

Embodiment 2

[0021] Example 2 is based on In III Sensitized Rare Earth Ion Luminescence by Metalorganic Anion Frameworks

[0022] Method: based on In III The metal-organic anion framework was used as the exchange matrix for ion exchange of lanthanide metal ions.

[0023] 1) Under the excitation of 340nm wavelength light, the In-based III The emission peak of the fluorescence emission spectrum of the metal organic anion framework crystal is 447nm, the result is as follows image 3 shown.

[0024] 2) Take 0.1M Tb(NO 3 ) 3 ·5H 2 The DMF solution 10ml of O, the In based on In III Put 50 mg of metal organic anion framework crystals into the solution for soaking. Replace with fresh 0.1M Tb(NO 3 ) 3 ·5H 2 O in DMF solution, the crystals were taken out after soaking for a week. Wash several times with DMF solution. Using light with a wavelength of 340nm as the excitation light, the determination is based on In III Metalorganic anion framework exchange for Tb 3+ Fluorescence emission...

Embodiment 3

[0029] Embodiment 3 is based on In III Metal-organic anion frameworks for selective adsorption of organic dyes

[0030] Method: based on In III The metal-organic anion framework was used as the adsorption matrix for the adsorption of mixed organic dyes.

[0031] Dissolve the organic dyes methyl orange and methylene blue in DMF solution to obtain a concentration of 5×10 methyl orange and methylene blue -5 Mixed dye solution of M.

[0032] Take 5ml of mixed dye solution, add based on In III 20mg of metal organic anion framework crystals, soaked at room temperature. The change of dye concentration in the mixed dye solution was detected by UV-vis spectroscopy. The result is as Figure 8 As shown, the peaks in the figure from top to bottom are 0min, 10min, 30min, 1h, 2h, 3h, 5h, 8h and 22h. Depend on Figure 8 It can be seen that the characteristic peak intensity of methylene blue at 650nm in the mixed dye solution gradually decreases, while the characteristic peak intensit...

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Abstract

The invention relates to an InIII-based metal organic anion framework and application thereof. The technical scheme is as follows: the preparation method comprises the following steps: adding 2,3',5,5'-biphenyltetracarboxylic acid, N,N'-dimethylformamide, ethanol, water and concentrated nitric acid into a container, and stirring at room temperature for 20 minutes; sealing the container, putting in a drying oven, and keeping at the temperature of 100-110 DEG C for 2-4 days; slowly cooling to room temperature to obtain a colorless transparent rod-like crystal; and washing, filtering and drying to obtain the target product. The InIII-based metal organic anion framework can sensitize rare earth ions to emit light when being used as an adsorption matrix, and can efficiently and selectively separate cationic organic dyes.

Description

technical field [0001] The invention relates to an In-based III Metal-organic frameworks, specifically, involving a cation-exchange-functional In-based III Metalorganic anion frameworks and their applications. Background technique [0002] In the field of host-guest chemistry, metal-organic frameworks (MOFs) have been widely studied as a functional material, for example: gas storage, ion exchange, separation, and fluorescence sensors. In particular, MOFs serve as a potential platform to alter their functions through rational post-synthetic modifications. Recently, charged MOFs have attracted increasing interest by charge-induced ion-exchange processes, which enable facile and controllable post-synthetic modification processes. Among these MOFs, anionic MOFs are often generated during the framework construction process of neutral organic ligands and metal ions, therefore, cations outside the framework are required to play the role of charge balance. Counter cations usuall...

Claims

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Application Information

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IPC IPC(8): C07F5/00B01J20/22
CPCB01J20/226B01J2220/46B01J2220/48C07F5/003
Inventor 韩正波刘琳张笑楠高明亮曹小漫
Owner 芜湖启博知识产权运营有限公司
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