In-situ study of substrate - catalyst interactions in a Juliá-Colonna epoxidation using quartz crystal microbalance with dissipation

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• 作者：Deborah Wakeham^a ; Dana G. Crivoi^b ; ^c ; Francesc Medina^b ; ^c ; Anna M. Segarra^b ; ^c ; ^{annamaria.segarra@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Mark W. Rutland^a ; ^d ; ^{mark@kth.se" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Quartz crystal microbalance with dissipation (QCM-D) ; Juliá ; &ndash ; Colonna epoxidation ; Poly-l-leucine (PLL) ; Catalysis
• 刊名：Journal of Colloid and Interface Science
• 出版年：2016
• 出版时间：1 May 2016
• 年：2016
• 卷：469
• 期：Complete
• 页码：263-268
• 全文大小：741 K

文摘

Quartz crystal microbalance with dissipation (QCM-D) analysis of the hexa-l-Leucine (PLL)-catalyzed epoxidation of chalcone gives in-situ experimental evidences which demonstrate that the reaction proceeds mainly via the formation of a PLL-bound hydroperoxide complex followed by the reversible addition of chalcone. The observations offer an alternative rationalization for the viability of the preferred catalytic pathway.