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Triptycene Molecular Rotor Mounted on Metallofullerene Sc3C2@C80 and Their Spin-Rotation Couplings

Abstract

Molecular machines have raised considerable attention due to their various applications. Except for the mechanical motion, it is essential to design advanced molecular machines with integrated functions. In this study, the triptycene rotor has been covalently linked to paramagnetic metallofullerene Sc3C2@C80 with an unpaired electron spin, resulting in a coupled system between spin flip and rotor speed. Two types of triptycene rotors were employed, one is pristine triptycene and another one has a sterically hindered methyl group. The temperature-dependent electron paramagnetic resonance (EPR) spectroscopy revealed that the spin-rotor coupling can be modulated by the rotation speed of triptycene rotors, which were further illustrated by variable-temperature 1H NMR. EPR simulation revealed that the rotations of the attached triptycene rotors can greatly influence the spin relaxation and spin-metal hyperfine couplings of Sc3C2@C80, realizing remote control on neighboring electron spin states. These findings of the coupled system between molecular rotor and spin flip would provide a way to design advanced molecular machine with magnetic function.

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Publication details

The article was received on 27 Jul 2018, accepted on 01 Sep 2018 and first published on 03 Sep 2018


Article type: Communication
DOI: 10.1039/C8NR06045B
Citation: Nanoscale, 2018, Accepted Manuscript
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    Triptycene Molecular Rotor Mounted on Metallofullerene Sc3C2@C80 and Their Spin-Rotation Couplings

    H. Meng, C. zhao, N. zhe, C. Wang and T. Wang, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR06045B

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