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Title: Design of high coordination number metallomesogens by decoupling of complex-forming and mesogenic groups
Authors: Cardinaels, Thomas
Driesen, Kris
Parac-Vogt, Tatjana
Heinrich, Benoit
Bourgogne, Cyril
Binnemans, Koen #
Issue Date: 2005
Conference: 9th International Symposium on Metallomesogens (ISM2005) location:Lake Arrowhead (California, USA) date:31 May – 3 June, 2005
Abstract: Liquid-crystalline complexes of rhenium(I), yttrium(III), lanthanum(III), neodymium(III), samarium(III), europium(III), erbium(III) and ytterbium(III) were obtained by coupling mesogenic 4-cyanobiphenyl groups with a long alkyl spacer to a substituted imidazo[4,5-f]1,10-phenanthroline, which acts as the coordinating group. In the case of the rare-earth complexes, 2-thenoyltrifluoroacetonate was used as the co-ligand. All the rare-earth complexes exhibit a nematic phase, whereas the rhenium(I) complexes show a nematic, a smectic C, or a lamello-columnar phase, and the imidazole-bearing phenanthroline ligands a nematic or a smectic phase, depending on the number of attached mesogenic groups. The phase structure of the smectic and lamello-columnar phase is discussed and described on the basis of both X-ray data and dynamic molecular modeling. The lanthanide complexes are highly luminescent in the solid phase and as a solution in a nematic liquid crystal host (5CB). This approach can be generalized to obtain other high coordination number metallomesogens.
Description: oral presentation by Koen Binnemans
Publication status: published
KU Leuven publication type: IMa
Appears in Collections:Molecular Design and Synthesis
# (joint) last author

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