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Cîrcu V, Molard Y, Amela-Cortes M, et al. From Mesomorphic Phosphine Oxide to Clustomesogens Containing Molybdenum and Tungsten Octahedral Cluster Cores. Angew Chem Int Ed Engl. 2015;54(37):10921-5doi: 10.1002/anie.201503205.
Cîrcu, V., Molard, Y., Amela-Cortes, M., Bentaleb, A., Barois, P., Dorcet, V., & Cordier, S. (2015). From Mesomorphic Phosphine Oxide to Clustomesogens Containing Molybdenum and Tungsten Octahedral Cluster Cores. Angewandte Chemie (International ed. in English), 54(37), 10921-5. https://doi.org/10.1002/anie.201503205
Cîrcu, Viorel, et al. "From Mesomorphic Phosphine Oxide to Clustomesogens Containing Molybdenum and Tungsten Octahedral Cluster Cores." Angewandte Chemie (International ed. in English) vol. 54,37 (2015): 10921-5. doi: https://doi.org/10.1002/anie.201503205
Cîrcu V, Molard Y, Amela-Cortes M, Bentaleb A, Barois P, Dorcet V, Cordier S. From Mesomorphic Phosphine Oxide to Clustomesogens Containing Molybdenum and Tungsten Octahedral Cluster Cores. Angew Chem Int Ed Engl. 2015 Sep 07;54(37):10921-5. doi: 10.1002/anie.201503205. Epub 2015 Jul 21. PMID: 26211657.
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Angew Chem Int Ed Engl. 2015 Sep 07;54(37):10921-5. doi: 10.1002/anie.201503205. Epub 2015 Jul 21.

From Mesomorphic Phosphine Oxide to Clustomesogens Containing Molybdenum and Tungsten Octahedral Cluster Cores.

Angewandte Chemie (International ed. in English)

Viorel Cîrcu, Yann Molard, Maria Amela-Cortes, Ahmed Bentaleb, Philippe Barois, Vincent Dorcet, Stéphane Cordier

Affiliations

  1. Université de Rennes 1, UMR "Sciences Chimiques de Rennes", UR1-CNRS 6226, Equipe Chimie du Solide et Matériaux, Campus de Beaulieu, CS 74205, 35042 Rennes Cedex (France). [email protected].
  2. Department of Inorganic Chemistry, University of Bucharest, Dumbrava Rosie 23, Bucharest 020464, sector 2 (Romania). [email protected].
  3. Université de Rennes 1, UMR "Sciences Chimiques de Rennes", UR1-CNRS 6226, Equipe Chimie du Solide et Matériaux, Campus de Beaulieu, CS 74205, 35042 Rennes Cedex (France). [email protected].
  4. Université de Rennes 1, UMR "Sciences Chimiques de Rennes", UR1-CNRS 6226, Equipe Chimie du Solide et Matériaux, Campus de Beaulieu, CS 74205, 35042 Rennes Cedex (France).
  5. Université de Bordeaux and CNRS, CRPP, UPR8641, 33600 Pessac (France).
  6. Université de Rennes 1, UMR "Sciences Chimiques de Rennes", UR1-CNRS 6226, Equipe Chimie du Solide et Matériaux, Campus de Beaulieu, CS 74205, 35042 Rennes Cedex (France). [email protected].

PMID: 26211657 DOI: 10.1002/anie.201503205

Abstract

New clustomesogens (i.e., metal atom clusters containing liquid crystalline (LC) materials) have been obtained by grafting neutral cyanobiphenyl (CB)- or cholesteryl-containing tailor-made dendritic mesomorphic triphenylphosphine oxide ligands on luminescent (M6 Cl(i) 8 )(4+) octahedral cluster cores (M=Mo, W). The LC properties were studied by a combination of polarizing optical microscopy (POM), differential scanning calorimetry (DSC), and X-ray powder diffraction analyses. While the organic ligands showed various mesophase types ranging from nematic, SmA columnar (SmACol ), SmA, and SmC phases, it turned out that the corresponding clustomesogens formed layered phases (SmA) over a wide range of temperatures that depend on the nature and density of mesogenic groups employed. Intrinsic luminescence properties of the cluster precursors are preserved over the entire range of LC phase existence.

© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords: cluster compounds; liquid crystals; molybdenum; phosphine oxide; tungsten

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