Infrared study of vibrational property and polymerization of C[sub 60] and C[sub 70] under pressure

Journal Article · Thu Oct 28 04:00:00 EDT 1993 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100145a007· OSTI ID:5425249

Yamawaki, H; Yoshida, M; Kakudate, Y; Usuba, S; Yokoi, H; Fujiwara, S; Aoki, K ^[1]; Ruoff, R; Malhotra, R; Lorents, D ^[2]

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1. National Inst. of Materials and Chemical Research, Tsukuba, Ibaraki (Japan)
2. SRI International, Menlo Park, CA (United States)

Infrared spectra were measured for solid C[sub 60] and C[sub 70] to 7 GPa under hydrostatic or quasi-hydrostatic pressure at room temperature. Some vibrational modes showed negative or insensitive dependence of frequency on pressure, suggesting destabilization of C[sub 60] and C[sub 70] molecules by compression. In solid C[sub 60] new absorption bands gradually grew with increasing pressure in association with an intensity decrease of the original bands. These spectral changes were interpreted in terms of polymerization of C[sub 60] molecules. Polymerized molecules recovered at ambient pressure were converted back to the monomer by thermal annealing at 473 K. 16 refs., 4 figs., 2 tabs.

• OSTI ID: 5425249
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 97:43; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606 -- Other Materials-- Physical Properties-- (1992-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ANNEALING
CARBON
CHEMICAL REACTIONS
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FULLERENES
HEAT TREATMENTS
INFRARED SPECTRA
NONMETALS
POLYMERIZATION
PRESSURE DEPENDENCE
SPECTRA
STABILITY
VIBRATIONAL STATES