Sulfonated Schiff base immobilized on magnetite-chitosan as an efficient nanocatalyst for the synthesis of xanthene derivatives

نویسندگانمحمدحسین علی جعفری طاهری,مسلم ستوده خواه,محسن مرادیان
نشریهScientific Reports
شماره صفحات19056
شماره مجلد15
ضریب تاثیر (IF)ثبت نشده
نوع مقالهFull Paper
تاریخ انتشار2025-05-30
رتبه نشریهعلمی - پژوهشی
نوع نشریهالکترونیکی
کشور محل چاپایران
نمایه نشریهJCR ,SCOPUS

چکیده مقاله

The present study aims to develop and enhance a magnetic heterogeneous catalyst with a core-shell structure, Fe O @CS/SSB (Fe O 3 4 3 4 @Chitosan-Salicylaldehyde-5-sulfonate), by immobilizing a chitosanbased Schiff base complex on the surface of magnetite. Chitosan, a low-cost, biodegradable, and biocompatible polymer with a suitable chemical structure such as the NH₂ functional group plays a significant role in heterogeneous catalytic systems. In this research, the Schiff base was synthesized through the condensation of a sulfonated aromatic aldehyde (salicylaldehyde) with the amine group of chitosan, forming a magnetic nanocatalyst with acidic properties. The catalyst was characterized using various analytical techniques, including XRD, FT-IR, VSM, TGA, DLS, FE-SEM, EDX, and TEM. The catalytic performance of the nanomagnetic catalyst was evaluated in the synthesis of 14-aryl-14-Hdibenzo[a, j]xanthenes and 12-aryl-9,9-dimethyl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-ones via a one-step condensation reaction of dimedone, 2-naphthol, and aryl aldehydes in ethanol. The progress of the reaction was monitored using thin-layer chromatography (TLC). The xanthenes derivatives were characterized by FT-IR, C NMR analyses. Ultimately, it was observed that the catalyst could be reused multiple times without significant loss of catalytic activity

tags: Sulfonated schiff base, Magnetic core, Chitosan, Magnetite, Xanthene