مشخصات پژوهش

عنوان	Equisetum arvense As an abundant source of silica nanoparticles. SiO2H3PW12O40 nanohybrid material as an efficient and environmental benign catalyst in the synthesis of 2‐amino‐4H‐chromenes under solvent‐free conditions
نوع پژوهش	مقاله چاپ شده
کلیدواژه‌ها	4H–coumarins, catalytic, H3PW12O40, heterogeneous, multi‐component, nanomaterial, nano‐silica
چکیده	Uniform SiO2 nanoparticles were successfully prepared from Equisetum arvense obtained from the north‐east of Iran. Then, surface modification of the extracted nanoparticles was performed with a methanol solution of H3PW12O40 via wet impregnation method. The prepared nanocatalyst was characterized by XRD, FESEM, ICP, UV–Vis, and FT‐IR spectroscopy. The supported heterogeneous nanocatalyst was successfully applied as a Lewis/Bronsted acid catalyst in the synthesis of a series of substituted 4H–chromenes via condensation of aromatic aldehydes, malononitrile, and 4‐hydroxycoumarin under solventless conditions with fine yields in appropriately short times
پژوهشگران	عفت اسماعیلی (نفر ششم به بعد)، زهره طباطبایی (نفر ششم به بعد)، نسرین عرفانی نیا (نفر پنجم)، بهروز ملکی (نفر چهارم)، حسن رامشینی (نفر سوم)، اکبر پژهان (نفر دوم)، رضا طیبی (نفر اول)