Unusual photoluminescence behavior of C[sub 70]
Journal Article
·
· Journal of Physical Chemistry; (United States)
- Univ. of Michigan, Ann Arbor, MI (United States)
- Harvard Univ., Cambridge, MA (United States)
- Univ. of California, San Diego, CA (United States)
Well-resolved photoluminescence (PL) spectra of C[sub 70] and [sup 13]C[sub 70] in a glassy methylcyclohexane matrix have been obtained over the range 10,000-16,000 cm[sup [minus]1] at temperatures between 4 and 77 K. The PL spectrum consists of a short-lived, red fluorescence system extending from 14 000 to 15 500 cm[sup [minus]1] and a longer-lived, IR phosphorescence system extending from 10,000 to 12,500 cm[sup [minus]1]. The PL spectrum is unusual in several aspects: the line widths are nearly 10-fold narrower than those of catacondensed hydrocarbons under similar conditions, and the temperature dependence suggests the presence of multiple emitting states (of the same spin multiplicity) or several emitting species in the highly dilute glassy matrix. To better understand the photophysical behavior of C[sub 70], we have attempted to correlate vibrational frequencies in the IR and Raman spectra of C[sub 70] and [sup 13]C[sub 70] with the vibronic intervals observed in the PL spectra. The study of [sup 13]C[sub 70] enabled a more detailed analysis of the vibronic structure of the fluorescence and phosphorescence spectra. 38 refs., 5 figs., 1 tab.
- OSTI ID:
- 6970426
- Journal Information:
- Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 98:30; ISSN JPCHAX; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400201 -- Chemical & Physicochemical Properties
400500* -- Photochemistry
ALKANES
AMORPHOUS STATE
CARBON
CARBON 13
CARBON ISOTOPES
COMPILED DATA
CYCLOALKANES
DATA
ELEMENTS
EVEN-ODD NUCLEI
FLUORESCENCE
FULLERENES
HYDROCARBONS
INFORMATION
INFRARED SPECTRA
ISOTOPES
LIGHT NUCLEI
LUMINESCENCE
NONMETALS
NUCLEI
NUMERICAL DATA
ORGANIC COMPOUNDS
PHOSPHORESCENCE
PHOTOLUMINESCENCE
RAMAN SPECTRA
SPECTRA
SPECTROSCOPY
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
400102 -- Chemical & Spectral Procedures
400201 -- Chemical & Physicochemical Properties
400500* -- Photochemistry
ALKANES
AMORPHOUS STATE
CARBON
CARBON 13
CARBON ISOTOPES
COMPILED DATA
CYCLOALKANES
DATA
ELEMENTS
EVEN-ODD NUCLEI
FLUORESCENCE
FULLERENES
HYDROCARBONS
INFORMATION
INFRARED SPECTRA
ISOTOPES
LIGHT NUCLEI
LUMINESCENCE
NONMETALS
NUCLEI
NUMERICAL DATA
ORGANIC COMPOUNDS
PHOSPHORESCENCE
PHOTOLUMINESCENCE
RAMAN SPECTRA
SPECTRA
SPECTROSCOPY
STABLE ISOTOPES
TEMPERATURE DEPENDENCE