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High charge mobility in liquid crystalline porphyrin-core dendrimers containing luminescent coumarin moieties

AutorConcellón, Alberto; Marcos, Mercedes; Romero, Pilar ; Serrano, José Luis; Termine, Roberto; Golemme, Attilio
Fecha de publicación2016
CitaciónEDEN5 (2016)
ResumenIn recent years, the especial architecture of dendrimers has been exploited in the design of functional materials with applications in target drug-delivering, optoelectronics, light harvesting, sensors, among others. Liquid crystal dendrimers present an attractive tool for the preparation of functional materials as they combine the dendritic properties with the self-organization into liquid crystalline phases. In previous works, we studied new families of liquid crystal dendrimers, prepared by hydrogen bonding between a triazine core and three periferial bifunctional dendrons containg a carboxyl group at their focal point, and carbazole, coumarin and pyrene groups, with potential applications in organic optoelectronic devices. Encouraged by the improvement on the preparation of ordered materials for organic electronic devices, we report this time a new class of discotic liquid crystalline porphyrin-core dendrimers which have coumarin functional groups around the porphyrin core. It is known that metalation strongly affects the photophysical properties of porphyrins, therefore, various metaled derivatives were also prepared. The chemical structures were confirmed by IR, NMR and MS. The liquid crystalline properties were studied by DSC, POM and X-ray diffraction. The optical, photoluminescence, electrochemical and charge transport properties were also investigated. All synthesized dendrimers showed mesogenic behaviour with strong photoluminescence. The charge mobilities are among the highest values reported for discotic liquid crystals.
DescripciónResumen del trabajo presentado al V Encuentro sobre Dendrímeros, celebtrado en Zaragoza (España) del 25 al 26 de enero de 2016.
URIhttp://hdl.handle.net/10261/149029
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