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Article Dans Une Revue Chemical Physics Année : 2016

Van-der-Waals based solvates of C60 with CBr2Cl2 and CBr2(CH3)2

Résumé

We demonstrate that solvates of fullerene C-60 form very predictable structures with finely tunable properties through the choice of the second component or solvent. Cubic co-crystals of C-60 center dot 12CCl(2)Br(2) and C-60 center dot 12CBr(2)(CH3)(2) were grown at room temperature in saturated solutions of fcc C-60 and the respective solvents (with C-2v molecular symmetry) They are unstable in air and transform spontaneously into the hexagonal co-crystals C-60 center dot 2CCl(2)Br(2) or C-60 center dot 2CBr(2)(CH3)(2). Whereas, the cubic co-crystals have positive excess volumes (+ 2% and + 5%, respectively), the stable hexagonal crystals, for which structures are given for the first time, possess negative excess volumes (-5% and -4.3%, respectively). The unit-cell volumes for both cubic and hexagonal co-crystals depend exclusively on the van-der-Waals volumes of the constituents and this correlation has been confirmed using previously published data.

Domaines

Chimie

Dates et versions

hal-04119681 , version 1 (06-06-2023)

Identifiants

Citer

Jin Ye, Maria Barrio, René Céolin, Navid Qureshi, Ivo B. Rietveld, et al.. Van-der-Waals based solvates of C60 with CBr2Cl2 and CBr2(CH3)2. Chemical Physics, 2016, 477, pp.39-45. ⟨10.1016/j.chemphys.2016.08.012⟩. ⟨hal-04119681⟩

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