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Apparent vibrational side-bands in pi-conjugated systems: the case of distyrylbenzene

C. C. Wu·E. Ehrenfreund·J. J. Gutierrez·J. P. Ferraris·Z. V. Vardeny
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Abstract

The photoluminescence (PL) spectra of dilute solution and single crystals of distyrylbenzene show unique temperature dependent vibronic structures. The characteristic single frequency progression at high temperatures is modulated by a low frequency progression series at low temperatures. None of the series side band modes corresponds to any of the distyrylbenzene Raman frequencies. We explain these PL properties using a time dependent model with temperature dependent damping, in which the many-mode system is effectively transformed to two- and then to a single "apparent" mode as damping increases.

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C. C. Wu, E. Ehrenfreund, J. J. Gutierrez, J. P. Ferraris, Z. V. Vardeny. 2005-12-03. Apparent vibrational side-bands in pi-conjugated systems: the case of distyrylbenzene. https://doi.org/10.1103/physrevb.71.081201

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