It is commonly assumed that recognition and discrimination of chirality, both in nature and in artificial systems, depend solely on spatial effects. However, recent studies have suggested that charge redistribution in chiral molecules manifests an enantiospecific preference in electron spin orientation. We therefore reasoned that the induced spin polarization may affect enantiorecognition through exchange interactions. Here we show experimentally that the interaction of chiral molecules with a perpendicularly magnetized substrate is enantiospecific. Thus, one enantiomer adsorbs preferentially when the magnetic dipole is pointing up, whereas the other adsorbs faster for the opposite alignment of the magnetization. The interaction is not controlled by the magnetic field per se, but rather by the electron spin orientations, and opens prospects for a distinct approach to enantiomeric separations.

Separation of enantiomers by their enantiospecific interaction with achiral magnetic substrates / Banerjee-Ghosh, K.; Dor, O. B.; Tassinari, F.; Capua, E.; Yochelis, S.; Capua, A.; Yang, S. -H.; Parkin, S. S. P.; Sarkar, S.; Kronik, L.; Baczewski, L. T.; Naaman, R.; Paltiel, Y.. - In: SCIENCE. - ISSN 0036-8075. - 360:6395(2018), pp. 1331-1334. [10.1126/science.aar4265]

Separation of enantiomers by their enantiospecific interaction with achiral magnetic substrates

Tassinari F.;Naaman R.;
2018

Abstract

It is commonly assumed that recognition and discrimination of chirality, both in nature and in artificial systems, depend solely on spatial effects. However, recent studies have suggested that charge redistribution in chiral molecules manifests an enantiospecific preference in electron spin orientation. We therefore reasoned that the induced spin polarization may affect enantiorecognition through exchange interactions. Here we show experimentally that the interaction of chiral molecules with a perpendicularly magnetized substrate is enantiospecific. Thus, one enantiomer adsorbs preferentially when the magnetic dipole is pointing up, whereas the other adsorbs faster for the opposite alignment of the magnetization. The interaction is not controlled by the magnetic field per se, but rather by the electron spin orientations, and opens prospects for a distinct approach to enantiomeric separations.
2018
360
6395
1331
1334
Separation of enantiomers by their enantiospecific interaction with achiral magnetic substrates / Banerjee-Ghosh, K.; Dor, O. B.; Tassinari, F.; Capua, E.; Yochelis, S.; Capua, A.; Yang, S. -H.; Parkin, S. S. P.; Sarkar, S.; Kronik, L.; Baczewski, L. T.; Naaman, R.; Paltiel, Y.. - In: SCIENCE. - ISSN 0036-8075. - 360:6395(2018), pp. 1331-1334. [10.1126/science.aar4265]
Banerjee-Ghosh, K.; Dor, O. B.; Tassinari, F.; Capua, E.; Yochelis, S.; Capua, A.; Yang, S. -H.; Parkin, S. S. P.; Sarkar, S.; Kronik, L.; Baczewski, L. T.; Naaman, R.; Paltiel, Y.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1260534
Citazioni
  • ???jsp.display-item.citation.pmc??? 51
  • Scopus 263
  • ???jsp.display-item.citation.isi??? 260
social impact