Structure and stability of pressure polymerized C60

• We discuss the bond energy of the orthorhombic C60 polymer and the structure of the two-dimensional C60 polymers. For the orthorhombic polymer, measurements of the dissociation energy by different methods give results that differ by a factor of two. We show that optical excitations lead to a temporary weakening of the intermolecular bonds and optical measurements thus show a low apparent bond energy. We have also polymerized a single crystal of C60 into two-dimensional phases. X-ray diffraction studies of this crystal have enabled us to determine the stacking sequences of both the tetragonal and the rhombohedral structures.

Subject headings

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

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

Keyword

Fullerenes

C60

high pressure synthesis

fullerene polymers

polymer chains

two-dimensional polymers

optical excitation

bond energy

bond strength

X-ray diffraction

single crystal

orthorhombic

tetragonal

rhombohedral

Condensed matter physics

Kondenserade materiens fysik

fysik

Physics

TECHNOLOGY

Publication and Content Type

ref (subject category)

kon (subject category)