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Control over the Self-Assembly Modes of Pt(II) Complexes by Alkyl Chain Variation: From Slipped to Parallel π-Stacks.
Allampally, Naveen Kumar; Mayoral, María José; Chansai, Sarayute; Lagunas, María Cristina; Hardacre, Christopher; Stepanenko, Vladimir; Albuquerque, Rodrigo Q; Fernández, Gustavo.
Afiliación
  • Allampally NK; Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
  • Mayoral MJ; Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
  • Chansai S; Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049, Madrid, Spain.
  • Lagunas MC; School of Chemistry and Chemical Engineering, Queen's Universtity Belfast, Stranmillis Road, Belfast, BT9 5AG, United Kingdom.
  • Hardacre C; School of Chemistry and Chemical Engineering, Queen's Universtity Belfast, Stranmillis Road, Belfast, BT9 5AG, United Kingdom.
  • Stepanenko V; School of Chemistry and Chemical Engineering, Queen's Universtity Belfast, Stranmillis Road, Belfast, BT9 5AG, United Kingdom.
  • Albuquerque RQ; Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
  • Fernández G; São Carlos Institute of Chemistry, University of São Paulo, A, v. Trab. São-Carlense, 400, 13560-970, São Carlos-SP, Brazil.
Chemistry ; 22(23): 7810-6, 2016 06 01.
Article en En | MEDLINE | ID: mdl-27113990
We report the self-assembly of a new family of hydrophobic, bis(pyridyl) Pt(II) complexes featuring an extended oligophenyleneethynylene-derived π-surface appended with six long (dodecyloxy (2)) or short (methoxy (3)) side groups. Complex 2, containing dodecyloxy chains, forms fibrous assemblies with a slipped arrangement of the monomer units (dPt⋅⋅⋅Pt ≈14 Å) in both nonpolar solvents and the solid state. Dispersion-corrected PM6 calculations suggest that this organization is driven by cooperative π-π, C-H⋅⋅⋅Cl and π-Pt interactions, which is supported by EXAFS and 2D NMR spectroscopic analysis. In contrast, nearly parallel π-stacks (dPt⋅⋅⋅Pt ≈4.4 Å) stabilized by multiple π-π and C-H⋅⋅⋅Cl contacts are obtained in the crystalline state for 3 lacking long side chains, as shown by X-ray analysis and PM6 calculations. Our results reveal not only the key role of alkyl chain length in controlling self-assembly modes but also show the relevance of Pt-bound chlorine ligands as new supramolecular synthons.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Compuestos Organoplatinos / Piridinas Idioma: En Revista: Chemistry Asunto de la revista: QUIMICA Año: 2016 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Alemania
Texto completo
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Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Compuestos Organoplatinos / Piridinas Idioma: En Revista: Chemistry Asunto de la revista: QUIMICA Año: 2016 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Alemania