High hole mobility and light-harvesting in discotic nematic dendrimers prepared via ‘click’ chemistry
| Autor: | Roberto Termine, Pilar Romero, Attilio Golemme, José Luis Serrano, Alberto Concellón, Mercedes Marcos |
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| Přispěvatelé: | Ministerio de Economía y Competitividad (España), European Commission, Gobierno de Aragón, Universidad de Zaragoza, Concellón, Alberto, Termine, Roberto, Golemme, Attilio, Romero, Pilar, Marcos, Mercedes, Serrano, José Luis, Concellón, Alberto [0000-0002-8932-9085], Termine, Roberto [0000-0003-2921-5905], Golemme, Attilio [0000-0002-1864-8708], Romero, Pilar [0000-0003-1378-0571], Marcos, Mercedes [0000-0001-7056-3181], Serrano, José Luis [0000-0001-9866-6633] |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Discotic liquid crystal Antenna effect 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Porphyrin 0104 chemical sciences Crystallography chemistry.chemical_compound Differential scanning calorimetry chemistry Liquid crystal Dendrimer Materials Chemistry Click chemistry 0210 nano-technology Luminescence |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname Zaguán. Repositorio Digital de la Universidad de Zaragoza |
| ISSN: | 2050-7534 2050-7526 |
| DOI: | 10.1039/c8tc06142d |
| Popis: | 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. This work was supported by the MINECO-FEDER funds (project CTQ2015-70174-P) and the Gobierno de Aragón-FSE (Research Group E47_17R). The authors would like to acknowledge the use of the SAI (UZ) and CEQMA (UZ-CSIC) Services. A. Golemme is grateful for the support from the ELIOTROPO project (PON03PE_00092_2). R. Termine was supported by the MERAVIGLIE project (CUP J28C17000080006). |
| Databáze: | OpenAIRE |
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