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

Publication: Research - peer-reviewJournal article – Annual report year: 2014

Without internal affiliation

  • Author: Maibohm, Christian

    University of Southern Denmark, Denmark

  • Author: Rastedt, M.

    University of Oldenburg, Germany

  • Author: Kutscher, F.

    University of Oldenburg, Germany

  • Author: Frey, O. N.

    University of Oldenburg, Germany

  • Author: Beckhaus, R.

    University of Oldenburg, Germany

  • Author: Rubahn, H. G.

    University of Southern Denmark, Denmark

  • Author: Al-Shamery, K.

    University of Oldenburg, Germany

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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
StatePublished - 2013
Externally publishedYes
CitationsWeb of Science® Times Cited: 2

    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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