Molecular Rotor of Cs2([18]crown-6)3 in the Solid State Coupled with the Magnetism of [Ni(dmit)2]
Journal of the American Chemical Society2005Vol. 127(12), pp. 4397–4402
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Tomoyuki Akutagawa, K. Shitagami, Sadafumi Nishihara, Sadamu Takeda, Tatsuo Hasegawa, Takayoshi Nakamura, Yuko Hosokoshi, Katsuya Inoue, Satoshi Ikeuchi, Yuji Miyazaki, Kazuya Saito
Abstract
Nanoscale molecular rotors that can be driven in the solid state have been realized in Cs2([18]crown-6)3[Ni(dmit)2]2 crystals. To provide interactions between the molecular motion of the rotor and the electronic system, [Ni(dmit)2]- ions, which bear one S=1/2 spin on each molecule, were introduced into the crystal. Rotation of the [18]crown-6 molecules within a Cs2([18]crown-6)3 supramolecule above 220 K was confirmed using X-ray diffraction, NMR, and specific heat measurements. Strong correlations were observed between the magnetic behavior of the [Ni(dmit)2]- ions and molecular rotation. Furthermore, braking of the molecular rotation within the crystal was achieved by the application of hydrostatic pressure.
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