Pyrazaboles: New room-temperature columnar liquid crystals

Authors

  • Dr. Joaquím Barberá,

    1. Química Orgánica, Facultad de Ciencias-ICMA Universidad de Zaragoza-CSIC, E-50009 Zaragoza (Spain)
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  • Raquel Giménez,

    1. Química Orgánica, Facultad de Ciencias-ICMA Universidad de Zaragoza-CSIC, E-50009 Zaragoza (Spain)
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  • Dr. José Luis Serrano

    Corresponding author
    1. Química Orgánica, Facultad de Ciencias-ICMA Universidad de Zaragoza-CSIC, E-50009 Zaragoza (Spain)
    • Química Orgánica, Facultad de Ciencias-ICMA Universidad de Zaragoza-CSIC, E-50009 Zaragoza (Spain)
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  • This work was financed by the Comisión Interministerial de Ciencia y Tecnología (projects MAT91-0962-CO2-01 and MAT93-0104), and the Diputación General de Aragón (research studentship to R. G.).

Abstract

A nove approach to mesomorphism is reported in which discotic pyrazole derivatives are formed by dimerization of half-disk-shaped promesogenic pyrazoles throught BH2 bridges. The figure show the texture of the Dhd mesophase exhibited by one of the resulting pyrazoboles. How the mesomorphism is affected by the number and position of peripheral chains is alos described.

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