Issue 27, 2009
From the journal:

Journal of Materials Chemistry

Structural characterization and physical properties of new tetrabenzopentaphene mesogens†

Carmen Romero,a   Diego Peña,a   Dolores Pérez,a   Enrique Guitián,*a   Roberto Termine,b   Attilio Golemme,b   Ana Omenat,c   Joaquín Barberác  and  José Luis Serrano*c  

* Corresponding authors

a Departamento de Química Orgánica, Facultad de Química, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
E-mail: qoenrgui@usc.es
Fax: +34 981 591014

b Laboratorio Licryl INFM-CNR, Dipartimento di Chimica, Centro di Eccelenza CEMIF.CAL, INSTM UdR-Calabria, University of Calabria, Rende, Italy

c Departamento de Química Orgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza - CSIC, Zaragoza, Spain
E-mail: joseluis@unizar.es
Fax: +34 976 762686

Abstract

The synthesis, structural and mesomorphic properties of five tetrabenzopentaphene derivatives are presented. All the compounds exhibit columnar mesophases which have been characterized by optical microscopy, differential scanning calorimetry and X-ray diffraction. The thermogravimetric analysis of the ester derivatives reveals that they suffer a decomposition process to the anhydride derivative at temperatures above 200 °C. The influence of the length of the terminal alkyl chains on the mesomorphic behaviour of the compounds has been studied. The structural characterization of the compounds has been completed with the study of their aggregation in solution by means of NMR. The fluorescent properties of the compounds are reported as well as a preliminary study of the photoconductivity of one of them.

Graphical abstract: Structural characterization and physical properties of new tetrabenzopentaphene mesogens

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Article information

DOI
https://doi.org/10.1039/B901260E
Article type
Paper
Submitted
20 Jan 2009
Accepted
14 Apr 2009
First published
27 May 2009

J. Mater. Chem., 2009,19, 4725-4731

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Structural characterization and physical properties of new tetrabenzopentaphene mesogens

C. Romero, D. Peña, D. Pérez, E. Guitián, R. Termine, A. Golemme, A. Omenat, J. Barberá and J. L. Serrano, J. Mater. Chem., 2009, 19, 4725 DOI: 10.1039/B901260E

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