Phenanthroimidazole triazine polymer as well as preparation method and application thereof
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A technology of phenanthroimidazolyl triazine and polymers, which is applied in the field of gas adsorbents, and can solve the problems of poor heat resistance, reduced adsorption capacity of adsorbents for carbon dioxide, and insufficient use requirements
Active Publication Date: 2019-08-23
XIANGTAN UNIV
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[0005] After a lot of research, there are still some problems in the research field of carbon dioxide adsorption by solid adsorbents: At present, the use of polyamine-based amination reagents and increasing the specific surface area of the carrier can properly improve the adsorption capacity of carbon dioxide, but the effect of improvement is still not enough. Further improvement is needed; secondly, in the pro
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Embodiment 1
[0076] A method for preparing a phenanthroimidazolyl triazine polymer, the method comprising the following steps:
[0077] (1) Preparation of 2-(4-cyanophenyl)-6,9-dicyano-1H-phenanthrene[9,10-d]:
[0078] a. Preparation of 3,6-dibromo-9,10-phenanthrenequinone:
[0079] Add 10.2ml of liquid bromine dropwise to 20.4g of 9,10-phenanthrenequinone and nitrobenzene solution of dibenzoyl peroxide. After the dropwise addition, heat the mixture to 110°C for 16h, wash the crude product with n-hexane, and filter That is, the brown product 3,6-dibromo-9,10-phenanthrenequinone was obtained;
[0080] b. Preparation of 3,6-dibromo-9,10-dimethoxyphenanthrene:
[0081] Dissolve 11.12g of 3,6-dibromo-9,10-phenanthrenequinone, 2.85g of tetrabutylammonium bromide in 100mlTHF and 100mlH 2 O Shake and mix in a separatory funnel for 5 minutes, then add 15ml of dimethyl sulfate, then add 30ml of 14.1 M sodium hydroxide aqueous solution, shake the mixture for 3 minutes, add 100g of ice to cool, ad...
Embodiment 2
[0092] Example 1 was repeated except that 2.85 g of tetrabutylammonium bromide was replaced by 16.018 g of sodium dithionite.
Embodiment 3
[0094] Repeat embodiment 1, just also add sodium dithionate in step a, 2.85g tetrabutylammonium bromide is replaced with 2.85g tetrabutylammonium bromide and 16.018g sodium dithionite.
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Abstract
The invention discloses a phenanthroimidazole triazine polymer and a preparation method thereof. The method comprises the following steps: performing bromination on 9,10-phenanthrenequinone, performing carbonyl protection, performing a substitution reaction on the product and a cyanate, performing oxidization to form 3,6-dicyano-9,10-phenanthrenequinone, performing ring formation on the 3,6-dicyano-9,10-phenanthrenequinone and 4-cyanobenzaldehyde to obtain 2-(4-cyanophenyl)-6,9-dicyano-1H-phenanthro[9,10-d]imidazole (CDPI), and finally performing a ZnCl2 ion thermal polymerization reaction byusing the 2-(4-cyanophenyl)-6,9-dicyano-1H-phenanthro[9,10-d]imidazole as a building block to obtain the phenanthroimidazole triazine polymer. The phenanthroimidazole triazine polymer provided by theinvention has the advantages of a high specific surface area, an abundant pore structure and good heat stability, is simple to prepare and low in cost, and has excellent CO2 adsorption performance under the temperature condition of 273K.
Description
technical field [0001] The invention relates to a triazine polymer, in particular to a phenanthroimidazolyl triazine polymer used for gas adsorption and a preparation method thereof, belonging to the field of gas adsorbents. Background technique [0002] As we all know, the massive emission of carbon dioxide is an important cause of the earth's greenhouse effect, so carbon dioxide is also called a greenhouse gas. Given the increasing demand for fossil fuels, it is not practical to limit CO2 emissions. However, we can absorb carbon dioxide during the emission process and further use the absorbed carbon dioxide for industrial raw material production, such as reducing carbon dioxide to methanol. [0003] Carbon dioxide capture technologies mainly include liquid amine absorption, membrane separation and adsorption methods. At present, liquid amine solution is mainly used to absorb carbon dioxide. This method has high adsorption capacity, good selectivity, and high efficiency, ...
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