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Preparation method of d-f heteronuclear bimetal organic framework material based on monometal coordination polymer

A technology of coordination polymers and organic frameworks, applied in the field of metal organic frameworks, to achieve the effects of simple operation, simple steps and high repetition rate

Inactive Publication Date: 2020-06-09
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the reported work so far has focused on the assembly of single-metal coordination polymers constructed with pure lanthanide ions (Ln) or transition metal ions (Tm), which still face great challenges in the construction of HMOFs.

Method used

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  • Preparation method of d-f heteronuclear bimetal organic framework material based on monometal coordination polymer
  • Preparation method of d-f heteronuclear bimetal organic framework material based on monometal coordination polymer
  • Preparation method of d-f heteronuclear bimetal organic framework material based on monometal coordination polymer

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Embodiment 1

[0040] Step 1, weigh 0.1 mmol of nickel nitrate and 0.05 mmol of H 2 L was dissolved in a mixed solution of 3 ml of DMA solution and 2 ml of distilled water, and stirred for 0.5 hour to make it evenly mixed.

[0041] Step 2, transfer the mixture obtained in step (1) into a 25 ml stainless steel reactor with a polytetrafluoroethylene liner, react at 120 ° C for four days, and cool down to room temperature to obtain green blocky crystals, which are monometallic MOF1 , whose molecular formula is [Ni(HL) 2 (H 2 O) 2 ], its coordination environment diagram is shown in figure 1 .

[0042] Step 3, weigh 0.05 mmol of MOF1 and 0.1 mmol of dysprosium nitrate and dissolve them in 6 ml of DMA solution, and stir at room temperature for 0.5 hours.

[0043] Step 4, filter the solution in step (3), add 2 ml of distilled water to the filtrate, stir again for 0.5 hours to mix evenly, transfer to a 10 ml small glass bottle, and put it in a constant temperature oven at 95°C for three days ,...

Embodiment 2

[0045] (1) Weigh 0.1 mmol of dysprosium nitrate and 0.05 mmol of H 2 L was dissolved in 3 ml of DMA solution and 2 ml of distilled water, and stirred for 0.5 hour to make it evenly mixed.

[0046] (2) Transfer the mixture obtained in step (1) into a 25 ml stainless steel reaction kettle lined with polytetrafluoroethylene, react at 120°C for four days, and cool down to room temperature to obtain green blocky crystals, which are monometallic MOF2 , whose molecular formula is [Dy 2 (L) 3 (H 2 O) 2 ]·4H 2 O, its coordination environment diagram is shown in figure 2 shown.

[0047] (3) Weigh 0.05 mmol of MOF2 and 0.1 mmol of nickel nitrate and dissolve them in 6 ml of DMA solution, and stir at room temperature for 0.5 hours.

[0048] (4) Filter the solution in step (3), add 2 ml of distilled water to the filtrate, stir again for 0.5 hours to make it evenly mixed, transfer it to a 10 ml small glass bottle, and put it in a constant temperature oven at 95°C to react for three ...

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Abstract

The invention provides a preparation method of a d-f heteronuclear bimetallic organic framework material based on a monometal coordination polymer. The method comprises the following steps: synthesizing two cases of Ni-based and Dy-based monometal coordination polymers MOFs, namely MOF1 and MOF2, by using a hydrothermal method; and reacting MOF1 and MOF2 used as precursors with dysprosium nitrateand nickel nitrate respectively to successfully prepare the two d-f heteronuclear bimetallic organic frameworks HMOF3 and HMOF4. According to the method, a d-f heteronuclear bimetallic organic framework material HMOFs is prepared by taking monometal MOFs as a precursor. The HMOFs material prepared by the method disclosed by the invention has a coordination unsaturated bimetallic node and relatively large porosity, and is expected to be applied to the fields of gas adsorption and organic catalysis.

Description

technical field [0001] The invention relates to the field of metal organic frameworks, in particular to a preparation method of d-f heteronuclear bimetallic organic framework materials based on monometallic coordination polymers. Background technique [0002] Heteronuclear metal-organic frameworks (HMOFs) are assembled by two or more metal ions and organic ligands, which can exert more excellent optical, electrical, magnetic, etc. through the interaction between different metal ions. performance. However, most of the reported work so far has focused on the assembly of single-metal coordination polymers constructed with pure lanthanide ions (Ln) or transition metal ions (Tm), which still face great challenges in the construction of HMOFs. . According to the principle of hard and soft acids and bases (HSAB), lanthanide ions (Ln) and transition metal ions (Tm) have different coordination behaviors. Ln is a hard acid and tends to coordinate with oxygen atoms, while Tm (such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00
CPCC08G83/008
Inventor 杨国平刘姣靳晶张文彦王尧宇
Owner NORTHWEST UNIV(CN)
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