Key words: supercritical carbon dioxide, siloxane aerogels, ferrocene
An effective method for the synthesis of hybrid structure siloxane aerogels with ferrocene fragments built into polymer structure has been developed. At the initial stage, a gel was obtained by polycondensation of tetraethoxysilane and ferrocene-containing alkoxysilanes, catalyzed by BF3 · Et2O in acetone. The transformation of gels into aerogels was carried out using SC-CO2. The aerogel samples were characterized in detail by Mossbauer spectroscopy and nitrogen adsorption methods, and the density of the materials was determined. The iron content in the resulting aerogels varies in the range of 3.6—8.7 % by weight of iron (or 11.9—28.7 % by weight of ferrocene units).
doi:10.1134/S1990793124701045