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Green-, Red-, and Infrared-Emitting Polymorphs of Sterically Hindered Push-Pull Substituted Stilbenes.
Pauk, Karel; Lunák, Stanislav; Ruzicka, Ales; Marková, Aneta; Mausová, Anna; Kratochvíl, Matous; Melánová, Klára; Weiter, Martin; Imramovský, Ales; Vala, Martin.
Afiliación
  • Pauk K; Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 53009, Pardubice, Czech Republic.
  • Lunák S; Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Purkynova 464/118, 61200, Brno, Czech Republic.
  • Ruzicka A; Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210, Pardubice, Czech Republic.
  • Marková A; Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Purkynova 464/118, 61200, Brno, Czech Republic.
  • Mausová A; Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 53009, Pardubice, Czech Republic.
  • Kratochvíl M; Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Purkynova 464/118, 61200, Brno, Czech Republic.
  • Melánová K; Joint Laboratory of Solid-State Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 84, 53210, Pardubice, Czech Republic.
  • Weiter M; Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Purkynova 464/118, 61200, Brno, Czech Republic.
  • Imramovský A; Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 53009, Pardubice, Czech Republic.
  • Vala M; Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Purkynova 464/118, 61200, Brno, Czech Republic.
Chemistry ; 27(13): 4341-4348, 2021 Mar 01.
Article en En | MEDLINE | ID: mdl-33119919
The synthesis, XRD single-crystal structure, powder XRD, and solid-state fluorescence of two new DPA-DPS-EWG derivatives (DPA=diphenylamino, DPS=2,5-diphenyl-stilbene, EWG=electron-withdrawing group, that is, carbaldehyde or dicyanovinylene, DCV) are described. Absorption and fluorescence maxima in solvents of various polarity show bathochromic shifts with respect to the parent DPA-stilbene-EWGs. The electronic coupling in dimers and potential twist elasticity of monomers were studied by density functional theory. Both polymorphs of the CHO derivative emit green fluorescence (527 and 550 nm) of moderate intensity (10 % and 5 %) in polycrystalline powder form. Moderate (5 %) red (672 nm) monomer-like emission was also observed for the first polymorph of the DCV derivative, whereas more intense (32 %) infrared (733 nm) emission of the second polymorph was ascribed to the excimer fluorescence.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Chemistry Asunto de la revista: QUIMICA Año: 2021 Tipo del documento: Article País de afiliación: República Checa Pais de publicación: Alemania
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Chemistry Asunto de la revista: QUIMICA Año: 2021 Tipo del documento: Article País de afiliación: República Checa Pais de publicación: Alemania