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Ron Naaman

29. dubna 2019
ÚOCHB
Ron Naaman
Přednášející
Prof. Ron Naaman (Department of Chemical and Biological Physics, Weizmann Institute, Rehovot, Izrael)
Téma
Polarized Spin and Chiral Molecules – How They Affect our Life?
Datum a čas
29. dubna 2019, 10:00
Místo
Přednáškový sál ÚOCHB (budova A, 2. NP, A2.01) 

Abstrakt

Spin based properties, applications, and devices are commonly related to magnetic effects and to magnetic materials. However, we found that chiral organic molecules act as spin filters for photoelectrons transmission,1 in electron transfer,2 and in electron transport.3

The effect, termed Chiral Induced Spin Selectivity (CISS),4,5 was found, among others, in bio-molecules and in bio-systems. It has interesting implications for the production of new types of spintronics devices6 and on electron transfer in biology.7 Recently we found that charge polarization in chiral molecules is accompanied by spin polarization.8 Enantioselective chemical transformations can be induced by spin polarized electrons.9 Several examples of enantioselective chemistry resulting from electron spin polarization will be presented. In these cases, the direction of magnetization of the ferromagnet substrate defines the sense (left-handed versus right-handed) of the enantioselectivity.

Zdroje

  1. Göhler, B et al. Science 2011, 331, 894. 
  2. Mishra, D et al. PNAS, 2013, 110, 14872. 
  3. Xie, Z et al. Nano Letters, 2011, 11, 4652.  
  4. Naaman, R.; Waldeck, D.H. J. Phys. Chem. Lett. (feature) 2012, 3, 2178.  
  5. R. Naaman, D. H. Waldeck Ann. Rev. Phys. Chem. 2015, 66, 263.  
  6. K. Michaeli, V. Varade, R. Naaman, D. Waldeck, J.Physics: Condensed Matter, 2017, 29, 103002.  
  7. I. Carmeli, K. S. Kumar, O. Hieflero, C. Carmeli, R. Naaman, Angew. Chem. 2014, 53, 8953.  
  8. A. Kumar et al. PNAS, 2017, 114, 2474. 
  9. R. A. Rosenberg, D. Mishra, R. Naaman Angew. Chem. 2015, 54, 7295.
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