Contact
    Start Publications Cyclopalladated ferrocenylimine self-assembly films for Suzuki ...
    ←  Publication Finder
    KSV NIMA

    Cyclopalladated ferrocenylimine self-assembly films for Suzuki coupling reaction

    Year: 2012

    Journal: Journal of Molecular Catalysis A: Chemical, 2012, 363-364, 200-207, 20131009

    Authors: Zhiua Fu, Tiesheng Li, Bing Mu, Luyan Mao, Guangqin Li, Wenjian Xu, Yangjie Wu

    Organizations: School of Chemistry and Molecular Engineering, The Key Lab of Chemical Biology and Organic Chemistry of Henan Province, The Key Lab of Advanced Nano-information Materials of Zhengzhou, Zhengzhou University, Zhengzhou 450052, PR China; Department of Chemistry, Zhengzhou Normal University, Zhengzhou 450052, PR China; School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450052, PR China

    The monolayer and LB films of cyclopalladated ferrocenylimine 1 were prepared at different surface pressure and applied for Suzuki–Miyaura reactions in the heterogeneous catalytic system. Morphology studies of monolayer were investigated by atomic force microscope (AFM), which showed that the surface morphologies of the LB films were significantly different at different surface pressure. LB films of cyclopalladated ferrocenylimine 1 prepared at surface pressure of 22 mN/m showed higher catalytic efficiencies compared with that at 14, 18, 26, 30 mN/m. These results demonstrated the catalytic efficiency was related to the molecular arrangement of the catalysts. The structure changes of cyclopalladated ferrocenylimine 1 LB films by low-angle X-ray diffraction (LAXD) as well as the film surface morphological changes by AFM in catalytic process were also investigated, which indicated that the substrate and base were contacting with the catalyst to cover the catalyst film surface at the beginning of catalytic process. The whole catalytic process included constantly contacting and covering the surface of the catalyst to generate Pd intermediates that could be transferred into the product, which were further identified by the X-ray photoelectron emission microscopy (XPS) analysis.