期刊
REACTION CHEMISTRY & ENGINEERING
卷 7, 期 7, 页码 1617-1625出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2re00058j
关键词
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资金
- TUBITAK 1001 -The Scientific and Technological Research Projects [120Z204, 120Z445]
- TUBITAK 2232 - International Fellowship for Outstanding Researchers [118C254]
- 2232 International Fellowship for Outstanding Researchers Program of TUBITAK [118C254]
- TUBITAK
In this study, nano-sized mesoporous carbon-supported HG2 and magnetic gamma-Fe2O3 nanoparticles were encapsulated within calcium alginate gels using a one-pot procedure. The encapsulated HG2 catalyst showed improved performance in water, achieving quantitative yields in ring-closing metathesis reactions even in tap water under an air atmosphere. The catalyst can be easily separated and reused multiple times.
In this study, nano-sized mesoporous carbon-supported HG2 and magnetic gamma-Fe2O3 nanoparticles were encapsulated within calcium alginate gels using a one-pot procedure. Mesoporous carbon within the hydrophilic alginate shell provided hydrophobic compartments for hydrophobic olefinic substrates to conduct olefin metathesis reactions in water under an air atmosphere. Stable alginate/mesoporous carbon gel structures were obtained in the presence of a non-ionic surfactant (Tween20) with a homogenous distribution of HG2 in the gel matrix as confirmed by scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) analysis. The HG2 catalyst encapsulated in the alginate/mesoporous carbon matrix exhibited an improved performance in water, and quantitative yields were obtained in ring-closing metathesis reactions of diethyl diallylmalonate even in tap-water under the air atmosphere with no significant ruthenium and iron leaching. The catalyst can be easily separated from the reaction mixture with the aid of a magnet, and it can be reused up to 7 times in RCM reactions.
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