Mobaraki Akbar, Hajibeygi Mohsen, Moradi Hesam, Pirasteh Mahdi, Takallou Ahmad
Department of Organic and Polymer Chemistry, Faculty of Chemistry, Kharazmi University, P. O. Box: 15719-14911, Tehran, Iran.
Natural and Medical Sciences Research Center, University of Nizwa, P.O. Box 33, 616, Birkat Al Mauz, Nizwa, Sultanate of Oman.
Sci Rep. 2025 Jan 22;15(1):2828. doi: 10.1038/s41598-025-86027-6.
In this research, with the Green Chemistry approach, to load more sulfonic acid active sites on catalyst surfaces, a nanocomposite material based on core-shell magnetite coated with vinyl silane and a sulfonated polymeric brush-like structure is designed and synthesized as a new class of efficient solid acid catalysts, referred to as FeO@VS-APS brush solid acid. The synthesized catalyst was comprehensively characterized by a range of instrumental techniques, including XRD, SEM, TEM, FT-IR, EDX, TGA, and VSM. The activity of the catalyst was evaluated in Biginelli, Strecker, and esterification reactions. The FeO@VS-APS brush solid acid has special features, such as easy reusability when a simple magnet is used for four reaction runs, an appropriate balance between hydrophobic and hydrophilic properties on the catalyst surface, and effective catalytic performance in the production of 3,4-dihydropyrimidin-2-one(thione) derivatives, 2-phenyl-2-(phenylamino)acetonitrile and octyl acetate.
在本研究中，采用绿色化学方法，为了在催化剂表面负载更多磺酸活性位点，设计并合成了一种基于包覆乙烯基硅烷的核壳型磁铁矿和磺化聚合物刷状结构的纳米复合材料，作为一类新型高效固体酸催化剂，称为FeO@VS-APS刷状固体酸。通过一系列仪器技术对合成的催化剂进行了全面表征，包括XRD、SEM、TEM、FT-IR、EDX、TGA和VSM。在Biginelli反应、Strecker反应和酯化反应中评估了催化剂的活性。FeO@VS-APS刷状固体酸具有一些特殊特性，例如当使用简单磁铁进行四次反应循环时易于重复使用、催化剂表面疏水和亲水性质之间的适当平衡以及在生产3,4-二氢嘧啶-2-酮（硫酮）衍生物、2-苯基-2-（苯基氨基）乙腈和乙酸辛酯方面的有效催化性能。
