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Host–guest interactions and orientation of dyes in the one-dimensional channels of zeolite L

  • Fois, Ettore Department of Science and High Technology, University of Insubria, and INSTM, Como, Italy
  • Tabacchi, Gloria Department of Science and High Technology, University of Insubria, and INSTM, Como, Italy
  • Devaux, André Department of Chemistry, University of Fribourg, Switzerland
  • Belser, Peter Department of Chemistry, University of Fribourg, Switzerland
  • Brühwiler, Dominik Institute of Chemistry and Biological Chemistry, Zurich University of Applied Sciences, Switzerland
  • Calzaferri, Gion Department of Chemistry and Biochemistry, University of Bern, Switzerland
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    23.07.2013
Published in:
  • Langmuir. - 2013, vol. 29, no. 29, p. 9188–9198
English A combined experimental and modeling study of methylacridine (MeAcr⁺) dye-zeolite L composites unravels the microscopic origin of their functional properties. The anisotropic orientation of the cationic dye inside the ZL channel is unambiguously determined and understood. The most stable orientation of MeAcr⁺, which features both its long and short molecular axes nearly perpendicular to the channel axis, is mainly determined by dye-ZL electrostatic interactions but also depends on the cosolvent water. In ZL, MeAcr⁺ is not hydrogen bonded to water or ZL framework oxygens and is hydrophobically solvated by water molecules. These findings further support the hypothesis that the cosolvent can importantly influence properties of dye–zeolite composites. Of relevance for a deeper comprehension of the physical chemistry of these hybrids is the observation that trivial energy transfer processes (self-absorption) are often playing a significant role in the optical properties of the composites.
Faculty
Faculté des sciences et de médecine
Department
Département de Chimie
Language
  • English
Classification
Chemistry
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/303289
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