Chain orientation and layer stacking in the high-pressure polymers of C60: Single crystal studies

• High-pressure polymerisation of C^o leads to a variety of new crystalline or amorphous phases which display interesting physical properties. We have prepared onedimensional (ID, C6o chains) and two-dimensional (2D, C60 layers) polymers from C6o single crystals. The resulting multi-domain crystals have been studied using x-ray diffraction and Raman spectroscopy. The relative orientations of the chains in the "low-pressure" ID orthorhombic polymer had been characterized previously [1]. We have now determined the specific stacking of the Ceo layers in the 2D tetragonal and rhombohedral polymers. Using these results we analyze the relations between the different polymers and the intermolecular environments which may play a role in stabilizing the observed polymer structures.

Ämnesord

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Nyckelord

Fullerenes

C60

structure

polymer chains

polymer structure

fullerene polymer

chain rotation

molecular rotation

molecular orientation

X-ray diffraction

XRD

electronic band structure

tetragonal

orthorhombic

rhombohedral

Raman spectroscopy

Raman scattering

Condensed matter physics

Kondenserade materiens fysik

fysik

Physics

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