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Synthesis method of two-dimensional cobalt complex, and applications of two-dimensional cobalt complex as photodegradation catalyst and ferroelectric material

A technology of cobalt complexes and ferroelectric materials, applied in the direction of organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, cobalt organic compounds, etc., can solve the difficult functional design and Modification, waste, serious environmental pollution, and restrictions on research progress, etc., to achieve excellent catalytic activity and repeatability, simple process, and high yield

Inactive Publication Date: 2020-03-17
YANCHENG TEACHERS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Traditional lead-containing ceramic ferroelectrics and perovskite-type inorganic ferroelectrics need to be calcined during production, which consumes a lot of energy, has low yield, causes serious environmental pollution from waste, and is difficult and brittle to form a film. constantly being innovated
In addition, the fact that inorganic-type ferroelectrics are difficult to functionally design and modify further limits research progress in this field.

Method used

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  • Synthesis method of two-dimensional cobalt complex, and applications of two-dimensional cobalt complex as photodegradation catalyst and ferroelectric material
  • Synthesis method of two-dimensional cobalt complex, and applications of two-dimensional cobalt complex as photodegradation catalyst and ferroelectric material
  • Synthesis method of two-dimensional cobalt complex, and applications of two-dimensional cobalt complex as photodegradation catalyst and ferroelectric material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: Synthesis of ligand 1,3,5-tris(2-methyl-1-imidazolyl)benzene (TMIB)

[0027] 1,3,5-tris(2-methyl -1-imidazolyl)benzene (TMIB);

[0028]

[0029] The molar ratio of 1,3,5-tribromobenzene:2-methylimidazole:potassium carbonate:cuprous oxide is 2:8:8:1; the reaction temperature is 160°C, and the reaction time is 24h. In a polar solvent, 1,3,5-tris(2-methanol) was prepared by heating 1,3,5-tribromobenzene, 2-methylimidazole, potassium carbonate and cuprous oxide in a one-pot method -1-imidazolyl)benzene (TMIB).

Embodiment 2

[0030] Embodiment 2: the synthesis of complex

[0031] 14.6mg of Co(NO 3 ) 2 ·6H 2O, 15.9 mg of TMIB, 9.1 mg of OH-H 2 BDC was dissolved in a mixed solution of 4 mL of water and 6 mL of DMA, ultrasonically oscillated for 5 min, transferred to a polytetrafluoroethylene liner of a 25 mL hydrothermal reactor, and reacted at 100°C for 72 hours, and the resulting product was washed three times with DMA (2 mL / time), to obtain purple transparent bar block crystals. Based on Co(NO 3 ) 2 ·6H 2 The calculated yield of O was as high as 63.6%.

Embodiment 3

[0032] Embodiment 3: Structural characterization of complexes

[0033] Use a microscope to select a single crystal of a suitable size, and use a Siemens (Bruker) SMART CCD diffractometer (graphite monochromator, Mo-Ka, ) to collect diffraction data. Diffraction data were corrected for absorption using the SADABS program. Data restoration and structure elucidation were done using the SAINT and SHELXTL programs, respectively. The coordinates of all non-hydrogen atoms were determined by the least squares method, and the positions of the hydrogen atoms were obtained by the theoretical hydrogenation method. The crystal structure was refined using the least squares method. Figure 1(a) and Figure 1(b) show the basic coordination and stacking modes. Some parameters of its crystallographic diffraction point data collection and structure refinement are shown in the table below.

[0034] Crystallographic data of the complexes in Table 1

[0035]

[0036] R 1 =∑||F o |-|F c |...

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Abstract

The invention provides a preparation method of a cobalt complex, and applications of the cobalt complex as a photodegradation catalyst and a ferroelectric material. The molecular formula of the complex is [Co5(OH-BDC)4(TMIB)4(NO3)2(DMA)2.2H2O]n, wherein -OH-H2BDC=5 is 5-hydroxyisophthalic acid, and TMIB is 1,3,5-tri(2-methyl-1-imidazolyl)benzene. The cobalt complex is of a two-dimensional networkstructure formed by self-assembling Co<2+> with OH-BDC<2-> and TMIB ligands. The cobalt complex has the property of efficiently catalyzing photodegradation of dyes: methylene blue is basically completely degraded within 90 minutes; and the cobalt complex is easy to separate, and can be recycled for multiple times. In addition, the cobalt complex has excellent ferroelectric properties: when an external electric field is 1100 V, the residual polarization Pr is 1.751 [mu]C / cm<2>, the coercive field Ec is 654 V / cm, and the saturated polarization Ps is 1.991 [mu]C / cm<2>, so that the cobalt complexis expected to be a novel ferroelectric material and has a wide application prospect in the field of information storage.

Description

[0001] Statement on funding research or development: This invention is carried out under the support of Jiangsu Provincial Policy Guidance Program (Industry-University-Research Cooperation)-Prospective Joint Research Project (Grant no.BY2016066-08). technical field [0002] The invention belongs to the technical field of organic synthesis and organometallic chemistry, and specifically relates to a cobalt complex with 1,3,5-tris(2-methyl-1-imidazolyl)benzene and 5-hydroxyisophthalic acid as a ligand Preparation and application of methylene blue (MB) photodegradation catalysts and ferroelectric materials. Background technique [0003] The rapid development of industry has brought about increasingly serious ecological and environmental problems. The living environment of human beings has been continuously destroyed, making the problem of water pollution more and more serious. At present, the main source of water pollution in my country is industrial wastewater, of which printin...

Claims

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Application Information

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IPC IPC(8): C07F15/06B01J31/22C02F1/30C08G83/00C02F101/38
CPCC07F15/065B01J31/2243C02F1/30C08G83/008C07B2200/13B01J2531/845C02F2305/10C02F2101/40B01J35/39
Inventor 王俊陈宁宁贾立永
Owner YANCHENG TEACHERS UNIV
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