Metallo mesogens and liquid crystals with a heart of gold

  1. Adams, H. 1
  2. Bailey, N.A. 1
  3. Bruce, D.W. 1
  4. Dhillon, R. 1
  5. Dunmur, D.A. 1
  6. Hunt, S.E. 1
  7. Lalinde, E. 1
  8. Maggs, Andrew A.. 1
  9. Orr, R. 1
  10. Styring, P. 1
  11. Wragg, M.S. 1
  12. Maitlis, P.M. 1
  1. 1 University of Sheffield
    info

    University of Sheffield

    Sheffield, Reino Unido

    ROR https://ror.org/05krs5044

Journal:
Polyhedron

ISSN: 0277-5387

Year of publication: 1988

Volume: 7

Issue: 19-20

Pages: 1861-1867

Type: Article

SCOPUS: 2-s2.0-0009533182 GOOGLE SCHOLAR

More publications in: Polyhedron

Abstract

Metallo-mesogens (molecular coordination complexes which show liquid crystalline properties) of various types have been made and characterized, including [MCl2(XC6H4C6H4CN)2], (M = Pd and Pt; X = n-alkyl and n-alkyloxy), [Rh(CO)2Cl(XC6H4C6H4CN)], [Ag(ROC6H4CHCHC5H4N2)]+Y-, [AuCl(ROC6H4CHCHC5H4N)], [M′(ROC6H4CS2)2]n (M′ = Zn, Ni, Pd) and [Au(ROC6H4CS2)X2] (X = Cl, Br). Most of these molecules are rod-like, with rigid central cores containing the metal and the ligating atoms, and flexible n-alkyl or -alkyloxy tails extending out along the molecular axes. They show the typical behaviour of thermotropic mesogens. The behaviour of the complexes can parallel that of the ligands (when they are also mesogenic), but transitions generally occur at rather higher temperatures. Many of these complexes exhibit unusual and useful optical properties; for example the palladium complexes (1) show a high birefringence. © 1988.