ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
We present a study of single molecule linewidth broadening of terrylene in dodecane, tetradecane, and hexadecane matrices. The Shpolskii bulk absorption spectra exhibit increase of the bandwidths and site complexity with increasing n-alkane chain length. Single molecule lines are broadened above the lifetime limit even at 1.6 K in all three solvents. The linewidth distributions suggest the existence of relaxing two-level systems coupled to the molecular transitions. Spectral diffusion was observed in the forms of spontaneous and photoinduced frequency jumps. Temperature dependencies of the single molecule linewidths show a wide range of power-law dependencies below 3 K and, in some cases, exponentially activated behavior above 3 K. Possible origins of the line broadening are discussed. © 1997 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.473895
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