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A PdII Carbene Complex with Anthracene Side‐Arms for π‐Stacking on Reduced Graphene Oxide (rGO)
An N‐heterocyclic carbene palladium(II) complex containing two anthracene side arms was immobilised on the surface of reduced graphene oxide (rGO) by π‐stacking. The activity of the homogeneous analogue and the supported complex in undirected C–H acetoxylation reaction of arenes was studied. The results show that the catalytic efficiency in acetoxylation of benzene is improved in the immobilised materials compared to the homogeneous analogue. According to XPS analysis, the immobilised catalyst maintains the original oxidation state of PdII after the catalytic reaction.
Detailed Band Structure of Twinned and Detwinned BaFe2As2 Studied with Angle-Resolved Photoemission Spectroscopy
We study the band structure of twinned and detwinned BaFe2As2 using angle-resolved photoemission spectroscopy. The combination of measurements in the ordered and normal states along four high-symmetry momentum directions Γ/Z−X/Y enables us to identify the complex reconstructed band structure in the ordered state in great detail. We clearly observe the nematic splitting of the dxz and dyz orbitals as well as folding due to magnetic order with a wave vector of (π,π,π). We are able to assign all observed bands. In particular we suggest an assignment of the electron bands different from previous reports. The high-quality spectra allow us to achieve a comprehensive understanding of the band structure of BaFe2As2.