Helix-Dependent Spin Filtering through the DNA Duplex.
J Am Chem Soc
; 138(48): 15551-15554, 2016 12 07.
Article
en En
| MEDLINE
| ID: mdl-27934017
ABSTRACT
Recent work suggests that electrons can travel through DNA and other chiral molecules in a spin-selective manner, but little is known about the origin of this spin selectivity. Here we describe experiments on magnetized DNA-modified electrodes to explore spin-selective electron transport through hydrated duplex DNA. Our results show that the two spins migrate through duplex DNA with a different yield and that spin selectivity requires charge transport through the DNA duplex. Significantly, shifting the same duplex DNA between right-handed B- and left-handed Z-forms leads to a diode-like switch in spin selectivity; which spin moves more efficiently through the duplex depends upon the DNA helicity. With DNA, the supramolecular organization of chiral moieties, rather than the chirality of the individual monomers, determines the selectivity in spin, and thus a conformational change can switch the spin selectivity.
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1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
ADN
Idioma:
En
Revista:
J Am Chem Soc
Año:
2016
Tipo del documento:
Article
País de afiliación:
Estados Unidos