Optical waveguiding and temperature dependent photoluminescence of nanotubulars grown from molecular building blocks

Christian Maibohm, M. Rastedt, F. Kutscher, O. N. Frey, R. Beckhaus, H. G. Rubahn, K. Al-Shamery

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Optical waveguiding of blue light after UV-excitation is demonstrated in bundles of organic nanotubulars obtained via template assisted aggregation of the small π-conjugated non planar molecules 17H-Tetrabenzo[a,c,g,i]fluorene (17H-Tbf) and 17-Trimethylsilyltetrabenzo[a,c,g,i]fluorene (TMS-Tbf). The propagating blue light is strongly attenuated due to self-absorption. Vibronic spectra for both nanotubulars and macroscopic crystallites for temperatures between 5 and 300 K show a behavior of TMS-Tbf that resembles that of long chained molecules while 17H-TbF resembles that of small organic molecules. For both molecular species crystallites and nanostructures have large average Huang-Rhys factors indicating strong phononic coupling promoted by the polycrystallinity of the samples. © 2013 Elsevier B.V. All rights reserved.
Original languageEnglish
JournalChemical Physics Letters
Volume590
Pages (from-to)87-91
ISSN0009-2614
DOIs
Publication statusPublished - 2013
Externally publishedYes

Keywords

  • Physical and Theoretical Chemistry
  • Physics and Astronomy (all)
  • Huang-Rhys factors
  • Molecular building blocks
  • Molecular species
  • Non-planar molecules
  • Optical waveguiding
  • Polycrystallinity
  • Small organic molecules
  • Temperature dependent photoluminescences
  • Crystallites
  • Waveguides
  • Molecules

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