Hydrogen bond induced high stability porous covalent organic gel material and preparation method thereof

A preparation method of hydrogen bond induced high stability porous covalent organic gel material, comprising the following steps:

• step 1, tetrakis (4-carboxyphenyl) silane is dissolved in methanol, and a concentration of tetra(4-carboxyphenyl)silane is kept at 10 g/L, which is named as solution A;
• step 2, adding concentrated sulfuric acid to the solution A in a volume of 2 mL per liter of the solution A, then water-bath heating and re-flowing for a predetermined time to obtain a solution B after cooling;
• step 3, evaporating the solution B under a vacuum pressure, dissolving remaining powder with an ethyl acetate, washing it with deionized water for predetermined times and drying, filtering and then evaporating the filtrate in a rotary evaporator until crystallization to obtain a colorless solid C, the colorless solid C is tetra(4-methylformate phenyl)silane;
• step 4, the colorless solid C and hydrazine hydrate are dissolved in methanol, with a concentration of colorless solid C is 55 g/L and a concentration of hydrazine hydrate is 35 ml/L, water-bath re-fluxing for a predetermined time, filtering and collecting white powder, and washing the white powder with methanol, drying and then obtaining a white solid D, the white solid D is tetra(4-benzoylhydrazide)silane;
• step 5, adding the white solid D and 1,4-Phthalaldehyde to N,N-dimethyl-formamide so that a concentration of the white solid D is 10 g/L and a concentration of 1,4-Phthalaldehyde is 5 g/L, after being dissolved, adding trifluoroacetic acid with an adding volume of 50 mL in per liter of the dissolved solution, and then getting a white opaque gel after 15-20 seconds and thus obtaining the desired hydrogen bond induced high stability porous covalent organic gel material.