Crystal structure and optical properties of n-pyrrole end-capped thiophene/phenyl co-oligomer: Strong h-type excitonic coupling and emission self-waveguiding

Silvia Tavazzi, Luciano Miozzo, Leonardo Silvestri, Stefano Mora, Peter Spearman, Massimo Moret, Silvia Rizzato, Daniele Braga, Abdou Karim Diagne Diaw, Diariatou Gningue-Sall, Jean Jacques Aaron, Abderrahim Yassar

Research output: Contribution to journalArticlepeer-review

Abstract

In view of their exploitation in working devices, mainly for their emission properties, the interest in crystals of thiophene/phenylene co-oligomers has recently increased. Here, we describe the strategies for the organic synthesis and crystal growth of a novel oligothiophene-based co-oligomer (thiophene/phenyl co-oligomer end-capped with pyrrole) designed to explore the effect of an electron-rich aromatic ring, such as pyrrole, to end-cap oligothiophenes. The growth by the melted material is also discussed and suggested for implementation in real devices. The UV-visible optical characterization is provided, and the results (absorption and emission excitonic transitions, H-type aggregation, self-waveguiding of the emitted light) are interpreted on the basis of the crystallographic data in the regime of strong intermolecular coupling.

Original languageEnglish
Pages (from-to)2342-2349
Number of pages8
JournalCrystal Growth and Design
Volume10
Issue number5
DOIs
Publication statusPublished - May 5 2010

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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