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Preparation method of metal complex functionalized hydrotalcite-like nano-layer sheet

A metal complex and functionalization technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve the problem of difficult removal of surfactant anions, Difficult to control the measurement relationship and other issues, to achieve the effect of reducing the concentration of surface hydroxyl groups, enhancing hydrophobic performance, and reducing the possibility

Inactive Publication Date: 2013-03-06
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is more suitable for negatively charged metal complexes to be loaded on the HTLc nanosheets, and there are the following disadvantages for loading neutral metal complexes: 1) the surfactant anions of macromolecules are difficult to remove, which hinders the HTLc nanosheets The use of plates, especially in the preparation of multifunctional catalysts, can not give full play to the catalytic performance of HTLc laminates; 2) The reaction between APTS grafted on HTLc nano-layers and metal complexes is limited by steric constraints and diffusion , not only difficult to carry out but also difficult to control the stoichiometric relationship between the two, resulting in uncertain coordination number of the central ion of the supported iron metalloporphyrin, which in turn affects the catalytic performance of the prepared supported catalyst

Method used

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  • Preparation method of metal complex functionalized hydrotalcite-like nano-layer sheet
  • Preparation method of metal complex functionalized hydrotalcite-like nano-layer sheet

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Embodiment approach

[0013] The implementation manner of realizing the present invention is as follows:

Embodiment approach 1

[0015] First, 10 mL of anhydrous ethanol solution containing 1 mmol of diethylenetriamine was added to 5 mL of anhydrous ethanol solution containing 2 mmol of salicylaldehyde, and after refluxing for 2 h under the protection of inert gas, the ligand N,N-bis (salicyledene) was obtained. ) diethylenetriamine (saldien). Next, 10 mL of 1 mmol of triethoxychloropropylsilane (CPTM) in absolute ethanol was added to 1 mmol of the prepared saldien anhydrous ethanol solution, and after refluxing for 3 h, 30 mL of anhydrous copper acetate dissolved in 1 mmol was added. The ethanol solution was refluxed for 5 h, and the solvent was removed in vacuo to obtain the desired copper Schiff base complex-functionalized silane, which was designated as Cusaldien-CPTM. Then, 1 g of nitrate-intercalated MgAl HTLc with a Mg / Al molar ratio of 2 was placed in 200 mL of N,N-dimethylformamide at 40 °C and 40 W for sonication for 1 h. After centrifugation, a uniform solution was obtained. Translucent coll...

Embodiment approach 2

[0017] First, 50 mL of anhydrous ethanol solution containing 5 mmol of diethylenetriamine was added to 25 mL of anhydrous ethanol solution containing 10 mmol of salicylaldehyde, and refluxed for 4 h under the protection of inert gas to obtain the ligand N,N-bis(salicyledene ) diethylenetriamine (saldien). Next, add 30 mL of anhydrous ethanol solution of 5 mmol triethoxychloropropylsilane (CPTM) into the 5 mmol prepared saldien anhydrous ethanol solution, and after refluxing for 10 h, add 30 mL of anhydrous copper acetate dissolved in 5 mmol. The ethanol solution was refluxed for 10 h, and the solvent was removed in vacuo to obtain the desired copper Schiff base complex-functionalized silane, which was denoted as Cusaldien-CPTM. Then, 4 g of glycinate intercalated MgAl HTLc with a Mg / Al molar ratio of 10 was placed in 200 mL of formamide and subjected to ultrasonic treatment for 6 h at room temperature and 100 W of ultrasonic treatment. After centrifugation, a uniform transluce...

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Abstract

The invention relates to a preparation method of a metal complex functionalized hydrotalcite-like nano-layer sheet, which belongs to the field of physical chemistry and material chemistry. The preparation method comprises the following steps of: utilizing metal complex functionalized silane to be directly reacted with surface hydroxyl on a hydrotalcite-like nano-layer sheet after stripping a layer so as to graft a metal complex on the hydrotalcite-like nano-layer sheet, and simultaneously utilizing the reaction of the silane and the surface hydroxyl and the electronic and three-dimensional effects of the grafted metal complex to weaken the electrostatic interaction between the stripped layer and the nano-layer sheet, thereby improving the stability of the hydrotalcite-like nano-layer sheet, preventing the hydrotalcite-like nano-layer sheet from being compounded after a solvent is removed, and still keeping the state of the nano-layer sheet. An organic-inorganic composite material prepared by adopting the method has the characteristics of large specific surface area and high content of the metal complex, and simultaneously has the multifunctional catalytic performances of hydrotalcite-like and the metal complex.

Description

technical field [0001] The preparation method of the metal complex-functionalized hydrotalcite-like nano-layer sheet of the present invention belongs to the categories of physical chemistry and material chemistry, and specifically relates to the direct contact between the metal complex-functionalized silane and the surface of the peeled hydrotalcite-like nano-layer sheet. The hydroxyl group reacts to prepare organic-inorganic composite materials with large specific surface area, high content of metal complexes, and multi-catalytic functions of hydrotalcite-like and metal complexes. Background technique [0002] Hydrotalcite-like compounds (HTLc) are composed of positively charged metal hydroxide layers and interlayer charge-balancing anions, similar in structure to brucite, so they are also called layered bimetals. Hydroxide (layered double hydroxide, LDH). Typically, such compounds are composed of Mg(OH) co-edges 2 The octahedral layered structure is stacked on top of eac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/26
Inventor 范彬彬史秀锋高升成白亚东李瑞丰
Owner TAIYUAN UNIV OF TECH