Molecular Rotor of Cs₂([18]crown-6)₃ in the Solid State Coupled with the Magnetism of [Ni(dmit)₂]

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.

Inorganic Anions Regulate the Phase Transition in Two Organic Cation Salts Containing [(4-Nitroanilinium)(18-crown-6)]+ Supramolecules

“…The driving force of these phase-transition compounds can be ascribed to the motional changes in the R-NH 3 + guest cation (R = aryl group) or/and anionic units. The use of the R group as a molecular rotor or pendulum unit produces desirable properties [25][26][27][28][29]. As a result, the motion of organic a molecular rotor or pendulum unit produces desirable properties [25][26][27][28][29].…”

Inorganic Anion Regulates the Phase Transition in Two Organic Cation Salts Containing [(4-Nitroanilinium)(18-crown-6)]⁺ Supramolecules

“…The driving force of these phase-transition compounds can be ascribed to the motional 2 of 11 changes in the R-NH3 + guest cation (R = aryl group) or/and anionic units. The use of the R group as a molecular rotor or pendulum unit produces desirable properties [13][14][15]. As a result, the motion of organic ammonium cations changes their dynamic state.…”

Cooperativity of dynamics of 18-crown-6 molecule forming one-dimensional chain in Cs2(18-crown-6)3[Ni(dmit)2]2

“…[11][12][13][14][15][16][17][18][19][20][21][22][23] The title compound consists of Cs 2 ͑18-crown-6͒ 3 supramolecular cation and ͓Ni͑dmit͒ 2 ͔ anion. The crystal structure was determined by single-crystal x-ray analyses, as shown in Fig.…”

“…1. 23 The supramolecular cation of Cs 2 ͑18-crown-6͒ 3 has a clubsandwich structure: Two Cs ions are sandwiched by three 18-crown-6 molecules. The cylindrical cations are arranged along the b axis while their axis being aligned nearly parallel to the axis.…”