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Luminescent CdSe Superstructures: A Nanocluster Superlattice and a Nanoporous Crystal.
Levchenko, Tetyana I; Kübel, Christian; Khalili Najafabadi, Bahareh; Boyle, Paul D; Cadogan, Carolyn; Goncharova, Lyudmila V; Garreau, Alexandre; Lagugné-Labarthet, François; Huang, Yining; Corrigan, John F.
Afiliación
  • Levchenko TI; Department of Chemistry, The University of Western Ontario , London, Ontario N6A 5B7, Canada.
  • Kübel C; Institute of Nanotechnology and Karlsruhe NanoMicro Facility, Karlsruhe Institute of Technology , 76344 Eggenstein-Leopoldshafen, Germany.
  • Khalili Najafabadi B; Department of Chemistry, The University of Western Ontario , London, Ontario N6A 5B7, Canada.
  • Boyle PD; Department of Chemistry, The University of Western Ontario , London, Ontario N6A 5B7, Canada.
  • Cadogan C; Department of Physics and Astronomy, The University of Western Ontario , London, Ontario N6A 3K7, Canada.
  • Goncharova LV; Department of Physics and Astronomy, The University of Western Ontario , London, Ontario N6A 3K7, Canada.
  • Garreau A; The Centre for Advanced Materials and Biomaterials Research (CAMBR), The University of Western Ontario , London, Ontario N6A 5B7, Canada.
  • Lagugné-Labarthet F; Department of Chemistry, The University of Western Ontario , London, Ontario N6A 5B7, Canada.
  • Huang Y; Department of Chemistry, The University of Western Ontario , London, Ontario N6A 5B7, Canada.
  • Corrigan JF; The Centre for Advanced Materials and Biomaterials Research (CAMBR), The University of Western Ontario , London, Ontario N6A 5B7, Canada.
J Am Chem Soc ; 139(3): 1129-1144, 2017 01 25.
Article en En | MEDLINE | ID: mdl-28084731
Superstructures, combining nanoscopic constituents into micrometer-size assemblies, have a great potential for utilization of the size-dependent quantum-confinement properties in multifunctional electronic and optoelectronic devices. Two diverse superstructures of nanoscopic CdSe were prepared using solvothermal conversion of the same cadmium selenophenolate precursor (Me4N)2[Cd(SePh)4]: the first is a superlattice of monodisperse [Cd54Se32(SePh)48(dmf)4]4- nanoclusters; the second is a unique porous CdSe crystal. Nanoclusters were crystallized as cubic crystals (≤0.5 mm in size) after solvothermal treatment at 200 °C in DMF. UV-vis absorption and PLE spectra of the reported nanoclusters are consistent with previously established trends for the known families of tetrahedral CdSe frameworks. In contrast to these, results of PL spectra are rather unexpected, as distinct room temperature emission is observed both in solution and in the solid state. The porous CdSe crystals were isolated as red hexagonal prisms (≤70 µm in size) via solvothermal treatment under similar conditions but with the addition of an alkylammonium salt. The presence of a three-dimensional CdSe network having a coherent crystalline structure inside hexagonal prisms was concluded based on powder X-ray diffraction, selected area electron diffraction and electron microscopy imaging. Self-assembly via oriented attachment of crystalline nanoparticles is discussed as the most probable mechanism of formation.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Am Chem Soc Año: 2017 Tipo del documento: Article País de afiliación: Canadá Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Am Chem Soc Año: 2017 Tipo del documento: Article País de afiliación: Canadá Pais de publicación: Estados Unidos