TY - JOUR
T1 - Spin-induced asymmetry reaction - The formation of asymmetric carbon by electropolymerization
AU - Bhowmick, Deb Kumar
AU - Das, Tapan Kumar
AU - Santra, Kakali
AU - Mondal, Amit Kumar
AU - Tassinari, Francesco
AU - Schwarz, Rony
AU - Diesendruck, Charles E.
AU - Naaman, Ron
N1 - Publisher Copyright:
Copyright © 2022 The Authors, some rights reserved.
PY - 2022/8/12
Y1 - 2022/8/12
N2 - We describe the spin polarization-induced chirogenic electropolymerization of achiral 2-vinylpyridine, which forms a layer of enantioenhanced isotactic polymer on the electrode. The product formed is enantioenriched in asymmetric carbon polymer. To confirm the chirality of the polymer film formed on the electrode, we also measured its electron spin polarization properties as a function of its thickness. Two methods were used: First, spin polarization was measured by applying magnetic contact atomic force microscopy, and second, magnetoresistance was assessed in a sandwich-like four-point contact structure. We observed high spin-selective electron transmission, even for a layer thickness of 120 nm. A correlation exists between the change in the circular dichroism signal and the change in the spin polarization, as a function of thickness. The spin-filtering efficiency increases with temperature.
AB - We describe the spin polarization-induced chirogenic electropolymerization of achiral 2-vinylpyridine, which forms a layer of enantioenhanced isotactic polymer on the electrode. The product formed is enantioenriched in asymmetric carbon polymer. To confirm the chirality of the polymer film formed on the electrode, we also measured its electron spin polarization properties as a function of its thickness. Two methods were used: First, spin polarization was measured by applying magnetic contact atomic force microscopy, and second, magnetoresistance was assessed in a sandwich-like four-point contact structure. We observed high spin-selective electron transmission, even for a layer thickness of 120 nm. A correlation exists between the change in the circular dichroism signal and the change in the spin polarization, as a function of thickness. The spin-filtering efficiency increases with temperature.
UR - http://www.scopus.com/inward/record.url?scp=85135951677&partnerID=8YFLogxK
U2 - 10.1126/sciadv.abq2727
DO - 10.1126/sciadv.abq2727
M3 - Article
C2 - 35947656
AN - SCOPUS:85135951677
SN - 2375-2548
VL - 8
JO - Science advances
JF - Science advances
IS - 32
ER -