Not Only Columns: High Hole Mobility in a Discotic Nematic Mesophase Formed by Metal-Containing Porphyrin-Core Dendrimers
Alberto Concellón
Instituto de Ciencia de Materiales de Aragón (ICMA), Departamento de Química Orgánica, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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Dr. Mercedes Marcos
Instituto de Ciencia de Materiales de Aragón (ICMA), Departamento de Química Orgánica, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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Dr. Pilar Romero
Instituto de Ciencia de Materiales de Aragón (ICMA), Departamento de Química Orgánica, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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Prof. José Luis Serrano
Instituto de Nanociencia de Aragón (INA), Departamento de Química Orgánica, Universidad de Zaragoza, 50009 Zaragoza, Spain
Search for more papers by this authorDr. Roberto Termine
LASCAMM CR-INSTM, CNR-NANOTEC SS di Rende, Dipartimento di Fisica, Università della Calabria, 87036 Rende, Italy
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Dr. Attilio Golemme
LASCAMM CR-INSTM, CNR-NANOTEC SS di Rende, Dipartimento di Fisica, Università della Calabria, 87036 Rende, Italy
Search for more papers by this authorAlberto Concellón
Instituto de Ciencia de Materiales de Aragón (ICMA), Departamento de Química Orgánica, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
Search for more papers by this authorCorresponding Author
Dr. Mercedes Marcos
Instituto de Ciencia de Materiales de Aragón (ICMA), Departamento de Química Orgánica, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
Search for more papers by this authorCorresponding Author
Dr. Pilar Romero
Instituto de Ciencia de Materiales de Aragón (ICMA), Departamento de Química Orgánica, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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Prof. José Luis Serrano
Instituto de Nanociencia de Aragón (INA), Departamento de Química Orgánica, Universidad de Zaragoza, 50009 Zaragoza, Spain
Search for more papers by this authorDr. Roberto Termine
LASCAMM CR-INSTM, CNR-NANOTEC SS di Rende, Dipartimento di Fisica, Università della Calabria, 87036 Rende, Italy
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Dr. Attilio Golemme
LASCAMM CR-INSTM, CNR-NANOTEC SS di Rende, Dipartimento di Fisica, Università della Calabria, 87036 Rende, Italy
Search for more papers by this authorAbstract
We report a new family of multifunctional liquid-crystalline porphyrin-core dendrimers that have coumarin functional groups around the porphyrin core. Porphyrin metalation strongly affects the photophysical properties, and therefore ZnII and CuII derivatives have also been prepared. All the synthesized dendrimers form a nematic discotic mesophase. Their high tendency for homeotropic alignment makes these dendrimers excellent candidates for device applications, owing to their easy processability, spontaneous alignment between electrodes, and self-healing of defects because of their dynamic nature. The charge mobility values of these materials are the highest ever reported for a nematic discotic phase. Moreover, these values are similar to the highest values reported for ordered columnar mesophases, and this shows that a supramolecular organization in columns is not necessary to achieve high charge mobility.
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