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In Search of the Molecular Triplet of C60 using Low Temperature Raman Spectroscopy.

Published online by Cambridge University Press:  21 March 2011

G. Chambers ,
A.B. Dalton  and
H.J. Byrne
G. Chambers
Affiliation:
Facility for Optical Characterisation And Spectroscopy (FOCAS)/School of Physics, Dublin Institute of Technology, Kevin Street, Dublin 8, Ireland.
A.B. Dalton
Affiliation:
Facility for Optical Characterisation And Spectroscopy (FOCAS)/School of Physics, Dublin Institute of Technology, Kevin Street, Dublin 8, Ireland.
H.J. Byrne
Affiliation:
Facility for Optical Characterisation And Spectroscopy (FOCAS)/School of Physics, Dublin Institute of Technology, Kevin Street, Dublin 8, Ireland.
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Abstract

The excited state properties of C60 thin films have been probed in the temperature range 77–273K using Raman spectroscopy. The change in the Raman, 2Ag mode of C60 (whose position is largely independent of temperature) was monitored as a function of the excitation intensity at 514.5nm. This mode normally positioned at 1469cm-1, was seen to shift reversibly to a lower Raman frequency with increasing laser intensity. Two excited state species have been identified. The first, at 1466cm-1 has been associated with the molecular triplet of C60. The second species at 1463cm-1, has been speculated to be an excited state co-operative involving two or more excited states in the solid and is seen to be intrinsic to solid state C60 below the phase transition.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 675: Symposium W – Nanotubes, Fullerenes, Nanostructured and Disordered Carbon , 2001 , W1.10.1
Copyright
Copyright © Materials Research Society 2001

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References

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