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Oligophenylenevinylenes in spatially confined nanochannels: Monitoring intermolecular interactions by UV/Vis and Raman spectroscopy

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  • Mariya Aloshyna, Unknown
  • Begona Milian Medina, Unknown
  • Lars Poulsen
  • Juliette Moreau, Unknown
  • David Beljonne
  • ,
  • Jerome Cornil
  • ,
  • Giuseppe Di Silvestro, Unknown
  • Michele Cerminara, Unknown
  • Francesco Meinardi, Unknown
  • Riccardo Tubino, Unknown
  • Heiner Detert, Unknown
  • Sigurd Schrader, Unknown
  • Hans-Joachim Egelhaaf
  • ,
  • Chiara Botta, Unknown
  • Johannes Gierschner
Perhydrotriphenylene-based channel-forming inclusion compounds (ICs) and thin films made of polyphenylenevinylene (PPV)-type oligomers with terminal alkoxy groups are investigated and compared in a combined experimental and theoretical approach. Interchromophore interactions and host-guest interactions are elucidated by UV/Vis and Raman spectroscopy. The impact of the local environment of the chromophore on the optical and photophysical properties is discussed in light of quantum-chemical calculations. In stark contrast to thin films where preferential side-by-side orientation leads to quenching of photoluminescence (PL) via non-emissive traps, the ICs are found to be attractive materials for opto-electronic applications: they offer high chromophore concentrations, but at the same time behave as quasi-isolated entities of tightly packed, well-oriented objects with high PL quantum yields and the possibility of color tuning.
Original languageEnglish
JournalAdvanced Functional Materials
Pages (from-to)915-921
Number of pages7
Publication statusPublished - 25 Mar 2008

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