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Influence of the poly(propylene imine) generation in the LC properties of ionic codendrimers bearing fluorinated and perhydrogenated chains

Authors

  • Silvia Hernández-Ainsa,

    1. Departamento de Química Orgánica, Facultad de Ciencias-Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, Zaragoza 50009, Spain
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  • Joaquín Barberá,

    Corresponding author
    1. Departamento de Química Orgánica, Facultad de Ciencias-Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, Zaragoza 50009, Spain
    • Departamento de Química Orgánica, Facultad de Ciencias-Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, Zaragoza 50009, Spain
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  • Mercedes Marcos,

    1. Departamento de Química Orgánica, Facultad de Ciencias-Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, Zaragoza 50009, Spain
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  • José Luis Serrano

    1. Instituto de Nanociencia de Aragón, Universidad de Zaragoza, Pedro Cerbuna 12, Zaragoza 50009, Spain
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Abstract

A series of codendrimers constituted by the first five generations of poly(propylene imine) (PPI) ionically substituted with 2H,2H,3H,3H-perfluoroundecanoic acid (af) and undecanoic acid (ac) in a fixed ratio (1:3) (af:ac) have been synthesized and their supramolecular organization has been investigated both in the liquid crystalline state and on a surface. Incompatibility generated by combining fluorinated and perhydrogenated chains in the same molecule causes a peculiar mesomorphic behavior depending on the generation of the codendrimers. Thus smectic A, frustrated smectic A or rectangular columnar mesophases have been detected. Despite their different liquid crystalline organization, they are capable to self-assemble in homogeneous molecular length layers on a surface, namely mica as revealed by atomic force microscopy (AFM) experiments. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 49: 278–285, 2011

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