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High hole mobility and light-harvesting in discotic nematic dendrimers prepared via ‘click’ chemistry

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Abstract

We report a new family of liquid crystalline porphyrin-core dendrimers with coumarin units at the periphery of the dendrimer. These compounds have been prepared by copper-catalyzed azide–alkyne “click” cycloaddition (CuAAC). The mesomorphic properties have been investigated via polarized optical microscopy (POM), differential scanning calorimetry (DSC) and X-ray diffraction (XRD). The peripheral coumarin units play a key role in the liquid crystal behavior, contributing to the appearance of discotic nematic mesophases with hole mobility values among the highest values reported for discotic liquid crystals (of the order of 1 cm2 V−1 s−1). It has also been demonstrated that excitation of the coumarin moieties leads to energy transfer (antenna effect) to the luminescent porphyrin core. Therefore, this strategy, which involves ‘click’ chemistry, has been proven to be a powerful and elegant synthetic tool for the preparation of optoelectronic materials based on complex dendritic architectures.

Graphical abstract: High hole mobility and light-harvesting in discotic nematic dendrimers prepared via ‘click’ chemistry

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Publication details

The article was received on 05 Dec 2018, accepted on 01 Feb 2019 and first published on 06 Feb 2019


Article type: Paper
DOI: 10.1039/C8TC06142D
Citation: J. Mater. Chem. C, 2019, Advance Article

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    High hole mobility and light-harvesting in discotic nematic dendrimers prepared via ‘click’ chemistry

    A. Concellón, R. Termine, A. Golemme, P. Romero, M. Marcos and J. L. Serrano, J. Mater. Chem. C, 2019, Advance Article , DOI: 10.1039/C8TC06142D

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