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Título
Isocyano-triphenylene complexes of gold, copper, silver and platinum. Coordination features and mesomorphic behavior
Año del Documento
2016
Editorial
American Chemical Society
Descripción
Producción Científica
Documento Fuente
Crystal Growth and Design, 2016, 16 (12), p. 6984–6991
Resumo
Stable organometallic complexes [AuX(CN-TriPh)] [X = Cl, C6F5, C6F4O-C10H21), C6F4O- (R)-2-octyl)], [(-4,4’-C6F4C6F4){Au(CN-TriPh)}2], [AuX(CN-TriPh)], [CuCl(CN-TriPh)], trans-[PtI2(CN-TriPh)2] and [Ag(CN-TriPh)2]BF4, bearing the previously unreported triphenylene-isocyanide ligand 1-isocyano-2,3,6,7,10,11-hexadodecyloxytriphenylene (CNTriPh), have been synthesized. The coordination features of the metal ion determine their thermal behavior. The free isocyanide ligand and all of the monomeric gold derivatives display enantiotropic mesomorphic behavior over a wide range of temperature (from 5 to 220 ºC), while the copper complex, with the same stoichiometry but not isostructural with the gold complexes, melts directly to an isotropic liquid. The bis-isocyanide platinum and silver complexes also melt directly to an isotropic liquid at low temperatures. In this case, the two trans coordinated
isocyanide ligands, connected by a too short linker, cannot become coplanar, which prevents the formation of a mesogenic structure. On the contrary, in the dinuclear gold complex the two isocyanide trans ligands are, due to the long Au-C6F4-C6F4-Au bridge, sufficiently separated to become coplanar and this complex gives rise to a mesophase. The structures of the mesophases were determined by small-angle X-ray scattering. All materials prepared show a fluorescent emission centered on the triphenylene core
Materias (normalizadas)
Chemistry
Revisión por pares
SI
Patrocinador
Ministerio de Economía, Industria y Competitividad (CTQ2014-52796-P)
Junta de Castilla y León (programa de apoyo a proyectos de investigación – Ref. VA302U13)
Junta de Castilla y León (programa de apoyo a proyectos de investigación – Ref. VA302U13)
Idioma
eng
Derechos
openAccess
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