Chakraborty Aratrika, Chakraborty Tonmoy, Menendez Maria Isabel, Chattopadhyay Tanmay
Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India.
Departamento de Química Física y Analítica, Universidad de Oviedo, C/ Julián Clavería 8, 33006 Oviedo, Spain.
ACS Omega. 2019 Jul 2;4(7):11558-11565. doi: 10.1021/acsomega.9b01143. eCollection 2019 Jul 31.
Cetrimonium bromide (CTAB)-coated water disperse magnetically separable nanocatalysts CTAB/FeO@dopa@ML (M = Fe or Mn, L = cyclohexane-1,2-diylbis(azanylylidene)bis(methanylylidene)bis(2,4-diXphenol; X = Cl, Br, and I) have been synthesized using a simple synthetic strategy. This approach provides a new fruitful strategy to reduce the leaching of the active metal complex from the catalyst surface to the aqueous media. The synthesized catalysts have been found to be excellent for oxidation of alcohols in aqueous medium at room temperature. A probable catalytic pathway involving the generation of hydroperoxo intermediates has been assumed, and these intermediates have been characterized using density functional theory and several spectroscopic techniques. It is worthy of mention that the synthesized CTAB-coated magnetically separable nanocatalysts can be magnetically recovered from the aqueous reaction mixture after more than five cycles, which renders this approach as a sustainable and accessible one.
十六烷基三甲基溴化铵（CTAB）包覆的水分散性磁分离纳米催化剂CTAB/FeO@dopa@ML（M = Fe或Mn，L = 环己烷-1,2-二亚基双（氮杂亚基）双（亚甲基）双（2,4-二X苯酚；X = Cl、Br和I）已采用简单的合成策略合成。该方法为减少活性金属配合物从催化剂表面向水介质中的浸出提供了一种新的有效策略。已发现合成的催化剂在室温下对水介质中醇的氧化具有优异性能。假定了一条可能涉及氢过氧中间体生成的催化途径，并且已使用密度泛函理论和几种光谱技术对这些中间体进行了表征。值得一提的是，合成的CTAB包覆的磁分离纳米催化剂在经过五个以上循环后可从水反应混合物中磁性回收，这使得该方法成为一种可持续且可行的方法。
