Insights into Magneto-Optics of Helical Conjugated Polymers

Journal of the American Chemical Society
Pan WangTimothy M Swager

Abstract

Materials with magneto-optic (MO) properties have enabled critical fiber-optic applications and highly sensitive magnetic field sensors. While traditional MO materials are inorganic in nature, new generations of MO materials based on organic semiconducting polymers could allow increased versatility for device architectures, manufacturing options, and flexible mechanics. However, the origin of MO activity in semiconducting polymers is far from understood. In this paper, we report high MO activity observed in a chiral helical poly-3-(alkylsulfone)thiophene (P3AST), which confirms a new design for the creation of a giant Faraday effect with Verdet constants up to (7.63 ± 0.78) × 104 deg T-1 m-1 at 532 nm. We have determined that the sign of the Verdet constant and its magnitude are related to the helicity of the polymer at the measured wavelength. The Faraday rotation and the helical conformation of P3AST are modulated by thermal annealing, which is further supported by DFT calculations and MD simulations. Our results demonstrate that helical polymers exhibit enhanced Verdet constants and expand the previous design space for polythiophene MO materials that was thought to be limited to highly regular lamellar structures. The struct...Continue Reading

References

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Citations

May 18, 2019·Nanotechnology·Hongjin FuYunfang Li
Sep 29, 2019·Organic & Biomolecular Chemistry·Masashi HasegawaYasuhiro Mazaki
Jan 8, 2019·Chemistry : a European Journal·Anjan Bedi, Ori Gidron
Apr 28, 2021·Journal of the American Chemical Society·Zachary NelsonTimothy M Swager
May 20, 2021·ACS Applied Materials & Interfaces·Leo Delage-LaurinTimothy M Swager
Jun 25, 2021·Chirality·Kun Wang, Yin Xiao
Jul 1, 2021·ACS Applied Materials & Interfaces·Po-Shen LinTomoya Higashihara
Jul 25, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Dorota KrasowskaJózef Drabowicz
Sep 8, 2020·Chemical Reviews·Gianluigi AlbanoLorenzo Di Bari
Aug 28, 2019·Accounts of Chemical Research·Anjan Bedi, Ori Gidron
Aug 22, 2018·Journal of the American Chemical Society·Pan WangTimothy M Swager
Apr 4, 2019·Chemical Reviews·Flavia PopNarcis Avarvari
Dec 15, 2018·Journal of the American Chemical Society·Constantin-Christian A Voll, Timothy M Swager
May 1, 2019·Journal of the American Chemical Society·Anthony J VarniTomasz Kowalewski

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