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Hexanuclear cerium-based organic framework compound single crystal and preparation method thereof

An organic framework and compound technology, applied in the field of hexanuclear cerium-based organic framework compound single crystal and its preparation, to achieve the effect that is conducive to the study of structure-property correlation

Active Publication Date: 2020-12-18
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obtaining a single crystal hexanuclear cerium-based organic framework compound and determining its structure by single crystal X-ray diffraction has not yet been reported

Method used

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  • Hexanuclear cerium-based organic framework compound single crystal and preparation method thereof
  • Hexanuclear cerium-based organic framework compound single crystal and preparation method thereof
  • Hexanuclear cerium-based organic framework compound single crystal and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0027] Put a mixture of 47.7mg (0.087mmol) cerium ammonium nitrate, 7.9mg (0.0435mmol) 2-aminoterephthalic acid, 2.0mL dimethylformamide, 195mg 2-fluorobenzoic acid, 0.5mL ethanol in 20mL glass scintillation In the bottle, it was ultrasonically shaken at room temperature until it became clear, heated in an oven at 105°C for 48 hours and then cooled to room temperature to form a large number of brown polyhedral hexanuclear cerium-based organic framework compound single crystals, that is, compound 1. The single crystal belongs to the cubic crystal system, the space group Fm-3m, and the unit cell parameter a is b for c for α is 90°, β is 90°, and γ is 90°. There is only one crystallographically independent nine-coordinated cerium ion in the asymmetric unit of compound 1, of which two coordinated oxygens are derived from hydroxyl groups, two coordinated oxygens are derived from oxygen ions, and the other four oxygens are derived from four different desorbed The carboxyl grou...

Embodiment 2

[0030] Put a mixture of 23.8mg (0.0435mmol) cerium ammonium nitrate, 7.9mg (0.0435mmol) 2-fluoroterephthalic acid, 1.5mL dimethylformamide, 341mg 2-fluorobenzoic acid, 0.5mL ethanol in 20mL glass scintillation In the bottle, ultrasonically oscillate at room temperature until clarification, heat in an oven at 105°C for 48 hours and then cool to room temperature to produce a large number of yellow hexagonal hexanuclear cerium-based organic framework compound single crystals, namely compound 2, which belongs to the hexagonal crystal system, P6 3 / mmc space group, unit cell parameter a is b for c for α is 90°, β is 90°, and γ is 120°. The asymmetric unit of compound 2 has only one crystallographically independent nine-coordinated cerium ion, of which two coordinated oxygens are derived from hydroxyl groups, two coordinated oxygens are derived from oxygen ions, and the other four oxygens are derived from four different deprotonated The carboxyl group on the ligand 2-fluoroter...

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Abstract

The invention discloses a six-core cerium based organic framework compound single crystal and a preparation method thereof. The preparation method is characterized in that ammonium ceric nitrate is taken as a metal source, 2-amino terephthalic acid or 2-fluoroterephthalic acid is taken as ligand, and a structure guide agent 2-fluorobenzoic acid is led in, and two cerium based organic framework compound single crystals are successfully prepared under a solvothermal synthesis condition; structures of the two cerium based organic framework compound single crystals are determined through a single-crystal X-ray diffraction technology; and the two compounds are porous materials, and show adsorption performances for hydrogen gas, carbon dioxide and methane gas.

Description

technical field [0001] The invention belongs to the technical field of preparation of crystal materials, and in particular relates to a hexanuclear cerium-based organic framework compound single crystal and a preparation method thereof. Background technique [0002] Metal-organic frameworks are a new type of porous materials. It is a three-dimensional network structure formed by the self-assembly of metal ions or metal clusters and organic multifunctional ligands through coordination bonds. Metal-organic frameworks have rich and varied structures, and are active in energy gases (H 2 、CH 4 ) adsorption storage, adsorption separation and conversion of carbon dioxide, purification of natural gas, heterogeneous catalysis, solid-state luminescence and chemical sensing, magnetism and drug slow release, etc. have shown potential application prospects, so they have been studied by many in the past two decades. workers' attention. [0003] Cerium-based organic framework compounds...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00B01J20/22B01J20/28B01J20/30B01D53/02
CPCB01D53/02B01D2257/108B01D2257/504B01D2257/7025B01J20/226B01J20/2808C08G83/008Y02C20/20Y02C20/40
Inventor 薛东旭张玉凤郭新爱白俊峰
Owner SHAANXI NORMAL UNIV
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