| Metal-organic framework(MOF)was a novel porous material during the past two years.Researchers now have kept studying them and find applications in many fields because of their unique characteristics such as high surface area.After the functional modification,metal-organic framework usually has a wide range of different effects on gas storage and separation,heterogeneous catalysis due to its different functional groups.Carbon-carbon double bonds,a functional group,are rarely modified in MOF materials due to their unstable nature.Therefore,the method of post-synthetic modification and the direct synthesis of organic ligands with double bonds were used to modify the carbon-carbon double bonds into MOF materials,and click chemistry reaction and gas adsorption test were performed on the modified MOF.The main work of this article is as follows:(1)UiO-66-NH2 is first synthesized by post-modification method,and then UiO-66-NH2 is reacted with methacrylic anhydride,carbon-carbon double bonds are connected to Ui0-66-NH2,and then nuclear magnetic resonance is used to test the yield of the conversion.After that,the "Thiol-ene" click chemistry reaction occurs with 1,8-octane dithiol and UiO-66-NH2 with double bond under certain conditions,and its conversion rate is nearly 90%verified by 1H NMR spectroscopy which illustrates the occurrence of a click chemistry reaction.(2)By using 2,5-dihydroxyterephthalic acid and chloromethyl styrene as the main starting materials,organic ligands with double bonds are synthesized under certain reaction steps and conditions,and they are purified and characterized by nuclear magnetic resonance.After that,a novel MOF was synthesized by reacting with zinc nitrate hex hydrate and 4,4-bipyridine.The MOF was then subjected to a single-crystal diffraction test to analyze the structure of the MOF,and subjected to gas adsorption test.It was found that the amount of CO2 adsorbed at 1 atmospheric pressure was 17.4 cm3/g,while there was no adsorption for N2 and CH4. |
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