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Observation of Asymmetric Oxidation Catalysis with B20 Chiral Crystals** |
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| Authors: | Prof Guowei Li Dr Qun Yang Prof Kaustuv Manna Dr Yudi Zhang Dr Patrick Merz Chandra Shekhar Yang Zhang Dr Hua Lv Dr Anastasios Markou Dr Yan Sun Prof Claudia Felser |
| Institution: | 1. CAS Key Laboratory of Magnetic Materials and Devices, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 China;2. Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
These authors contributed equally to this work.;3. Department of Physics, Indian Institute of Technology, New Delhi, 110016 India These authors contributed equally to this work.;4. CAS Key Laboratory of Magnetic Materials and Devices, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 China University of Chinese Academy of Sciences, 19 A Yuquan Rd, Shijingshan District, Beijing, 100049 China;5. Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany;6. Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139 USA |
| Abstract: | The study of heterogeneous reactions for enantiomeric processes based on inorganic crystals has been resurgent in recent years. However, the question remains how homochirality develops in nature and chemical reactions. Here, the successful growth of B20 group PdGa single crystals with different chiral lattices enabled us to achieve enantioselective recognition of 3,4-dihydroxyphenylalanine (DOPA) based on a new mechanism, namely orbital angular momentum (OAM) polarization. The orbital textures of PdGa crystals indicate large OAM polarization near the Fermi level and carrying opposite signs. A positive or negative magnetization in the 111] direction is expected depending on the chiral lattice of PdGa crystals. Due to this, the adsorption energies of PdGa crystals and DOPA molecules differ depending on how well the O-2p orbital of DOPA pairs with the Pd-4d orbital of PdGa. The results provide one possible explanation for how chirality arises in nature by providing an enantioselective route with pure inorganic crystals. |
| Keywords: | Asymmetric Oxidation Chiral Crystals Orbital Angular Momentum Polarization PdGa Spin Polarization |