Preparation method of molecular forcipiform metal organic frame material having fixed coordination configuration and accurate regulation and control of coordination bond length
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A technology of metal-organic framework and molecular tweezers, applied in separation methods, chemical instruments and methods, separation of dispersed particles, etc., can solve problems such as lack of controllability
Active Publication Date: 2018-07-17
WUHAN UNIV
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[0005] The problem to be solved by the present invention is to provide a method for preparing a molecular clamp-like metal-organic framework material with a fixed coordination configuration and a precise adjustment of the length of the coordination bond in view of the lack of controllability in the construction of the existing metal coordination environment. Can control the metal coordination environment while keeping the coordination geometry unchanged
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Embodiment 1
[0027] Synthesis of Formic Acid Modified Molecular Clamp Metal Organic Frameworks
[0028] Add 27mg ZrCl to a 10mL test tube 4 , 30 mg TBPA, 20 mg MTBC, 54.7 μL formic acid and 3.4 mL N,N-diethylformamide. Plug the test tube with a rubber stopper and insert it into a sand bath, stir at a speed of 200r / min, heat at 120°C for 24 hours, cool to room temperature, and centrifuge to obtain a powdery solid, that is, a formic acid-modified molecular pincer-like metal organic frame material.
Embodiment 2
[0030] Synthesis of Trifluoroacetic Acid-Modified Molecular Clamp-like Metal-Organic Frameworks
[0031] Add 27mg ZrCl to a 10mL test tube 4 , 30 mg TBPA, 20 mg MTBC, 107.7 μL trifluoroacetic acid and 3.4 mL N,N-diethylformamide. Plug the test tube with a rubber stopper and insert it into a sand bath, stir at a speed of 200r / min, heat at 120°C for 24 hours, cool to room temperature, and centrifuge to obtain a powdery solid, that is, a trifluoroacetic acid-modified molecular clamp metal organic framework materials.
Embodiment 3
[0033] Synthesis of Benzoic Acid-Modified Molecular Clamp-like Metal-Organic Frameworks
[0034] Add 27mg ZrCl to a 10mL test tube 4 , 30mg TBPA, 20mg MTBC, 175mg benzoic acid and 3.4mL N,N-diethylformamide. Plug the test tube with a rubber stopper and insert it into a sand bath, stir at a speed of 200r / min, heat at 120°C for 24 hours, cool to room temperature, and centrifuge to obtain a powdery solid, that is, a benzoic acid-modified molecular pincer metal An organic framework material with a TBPA mole fraction of 50%.
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Abstract
The invention discloses a preparation method of a molecular forcipiform metal organic frame material having fixed coordination configuration and accurate regulation and control of a coordination bondlength. The material is prepared by three ligands of a fluorescence ligand TBPA, a material building ligand MTBC and an ion coordination environment regulation and control ligand. Through limitation of a metal organic frame structure, the 3 coordinated TBPA ligand and a series of a 1 coordinated ligand combinations partially replace the 4 coordinated organic ligand in a frame, the coordination configuration can be fixed, and the 1 coordinated ligand is changed to change the coordination bond length. The method has the advantages that based on unchanged metal coordination configuration, the coordination bond length is changed, the method can accurately and continuously regulate and control the metal coordination environment, and performance optimization can be achieved.
Description
technical field [0001] The invention belongs to the technical field of material synthesis, and in particular relates to a preparation method of a molecular clamp-like metal organic framework material with a fixed coordination configuration and a coordination bond length that can be precisely regulated. Background technique [0002] Metal-organic framework materials are infinitely extended structures in two-dimensional or three-dimensional space, which are composed of metal nodes in the inorganic part and ligands in the organic part through coordination bonds. The emergence of this material has attracted scientists from all over the world to join this field with its unique order, atomic position determinability, porosity, and ease of design. After more than ten years of development, its application prospects are becoming more and more extensive. Including: adsorption and separation of gases, organic catalysis, collection of water molecules, molecular recognition, electrode m...
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