Journal
CHEMICAL PHYSICS
Volume 282, Issue 1, Pages 109-119Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0301-0104(02)00621-3
Keywords
single molecule spectroscopy; terrylene; Stark effect; microscopy; fluorescence; Shpol'skii system; low temperature
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Stark effect experiments have been performed on terrylene (Tr) and 2.3.7.8-di-(peri-naphthylen)-pyren (DPNP) molecules, both, in a n-hexadecane Shpol'skii matrix by single molecule spectroscopy technique at low temperatures. Electric field was applied to the samples in a range of up to 20 kV/cm. The differences between the dipole moments in the ground and first excited states have been calculated from the experimental data. The molecules showed mostly a linear shift in an external electric field and the contribution of the quadratic shift was rather small. A few molecules have demonstrated higher than linear or quadratic Stark effect, their spectra are presented and discussed. (C) 2002 Elsevier Science B.V. All rights reserved.
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