title: In-situ study of substrate--catalyst interactions in a Juliá-Colonna epoxidation using quartz crystal microbalance with dissipation.
abstract: 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.
authors.affiliation: Surface and Corrosion Science, School of Chemical Science and Engineering, KTH Royal Institute of Technology, Drottning Kristinas väg 51, 100 44 Stockholm, Sweden.
authors.forename: Deborah
authors.initials: D
authors.lastname: Wakeham
authors.affiliation: Department d'EnginyeriaQuimica, UniversitatRovira I Virgili, Av. Paisos Catalans, 26, Campus Sescelades, Tarragona 43007, Spain; EMaS-Research Center on Engineering of Materials and Micro/nanoSistems, UniversitatRovira I Virgili, Marcel-li Domingo, s/n, Tarragona 43007, Spain.
authors.forename: Dana G
authors.initials: DG
authors.lastname: Crivoi
authors.affiliation: Department d'EnginyeriaQuimica, UniversitatRovira I Virgili, Av. Paisos Catalans, 26, Campus Sescelades, Tarragona 43007, Spain; EMaS-Research Center on Engineering of Materials and Micro/nanoSistems, UniversitatRovira I Virgili, Marcel-li Domingo, s/n, Tarragona 43007, Spain.
authors.forename: Francesc
authors.initials: F
authors.lastname: Medina
authors.affiliation: Department d'EnginyeriaQuimica, UniversitatRovira I Virgili, Av. Paisos Catalans, 26, Campus Sescelades, Tarragona 43007, Spain; EMaS-Research Center on Engineering of Materials and Micro/nanoSistems, UniversitatRovira I Virgili, Marcel-li Domingo, s/n, Tarragona 43007, Spain. Electronic address: annamaria.segarra@gmail.com.
authors.forename: Anna M
authors.initials: AM
authors.lastname: Segarra
authors.affiliation: Surface and Corrosion Science, School of Chemical Science and Engineering, KTH Royal Institute of Technology, Drottning Kristinas väg 51, 100 44 Stockholm, Sweden; SP Technical Research Institute of Sweden, SP Chemistry, Materials and Surfaces, Box 5607, SE-114 86 Stockholm, Sweden. Electronic address: mark@kth.se.
authors.forename: Mark W
authors.initials: MW
authors.lastname: Rutland
keywords: Catalysis; Juliá–Colonna epoxidation; Poly-l-leucine (PLL); Quartz crystal microbalance with dissipation (QCM-D)