A Variable Temperature FT-IR Study Of The Liquid Crystalline Behaviour Of Octakis(N-Hexoxy)Phthalocyanine-Copper(II).

Bert Lutz; John van der Maas; Johan van der Pol; Wiendelt Drenth

doi:10.1117/12.969549

1 December 1989 A Variable Temperature FT-IR Study Of The Liquid Crystalline Behaviour Of Octakis(N-Hexoxy)Phthalocyanine-Copper(II).

Bert Lutz, John van der Maas, Johan van der Pol, Wiendelt Drenth

Author Affiliations +

Proceedings Volume 1145, 7th Intl Conf on Fourier Transform Spectroscopy; (1989) https://doi.org/10.1117/12.969549
Event: Seventh International Conference on Fourier and Computerized Infrared Spectroscopy, 1989, Fairfax, VA, United States

Abstract

Phthalocyanines (Pc) have unique physical properties which make them interesting for different fields of application. The mobile n-electrons within the Pc-nucleus provide the basis for their semiconducting behaviour. Extension of the electrical conductivity is being pursued by increasing the π-πoverlap between several Pc units. The liquid crystalline behaviour of extended stacks of disc-like peripherally substituted octa-n-alkoxy Pc's has been reported earlier [1]. X-ray powder diffraction studies showed a stacked hexagonally arranged ordered columnar structure (Dho) for the mesophase (Fig. 1). The ability to trace small changes in the absorption bands makes FT-IR ideally suitable for the study of conformational changes and intermolecular rearrangements. It has been shown that not only the bandmaxima but also the integrated intensity and bandwidth are sensitive to phase transitions [2,3,4,5].

Citation Download Citation

Bert Lutz, John van der Maas, Johan van der Pol, and Wiendelt Drenth "A Variable Temperature FT-IR Study Of The Liquid Crystalline Behaviour Of Octakis(N-Hexoxy)Phthalocyanine-Copper(II).", Proc. SPIE 1145, 7th Intl Conf on Fourier Transform Spectroscopy, (1 December 1989); https://doi.org/10.1117/12.969549

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