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Updated: Aug 15, 2026

Spatial Separation of Molecular Conformers and Clusters
Published on: January 9, 2014
Ultrafast formation of nonemissive species via intermolecular interaction in single crystals of conjugated molecules
M A Loi1, A Mura, G Bongiovanni
1Dipartimento di Fisica, Università di Cagliari, and Istituto Nazionale per la Fisica della Materia, I-09042 Monserrato, Italy.
Abstract:
We investigate the influence of interchain interactions on the photoluminescence processes in a sexithiophene single crystal by applying hydrostatic pressure. We perform transient photoluminescence spectroscopy in the time domain of 100 fs for pressures up to 60 kbar. The combined use of steady-state and time-resolved optical spectroscopies allows us to show that the pressure-induced quenching of the photoluminescence is caused by an ultrafast (approximately 100 fs) formation of intermolecular species.
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