Rigid tetracatenar liquid crystals derived from 1,10-phenanthroline

T. Cardinaels, J. Ramaekers, Peter Nockemann, K. Driesen, K. Van Hecke, L. Van Meervelt, G. Wang, S. De Feyter, E.F. Iglesias, D. Guillon, B. Donnio, K. Binnemans, D.W. Bruce

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

Tetracatenar liquid crystals were obtained by substituting the 1,10-phenanthroline central core unit at the 3- and 8-positions by extended, rigid acetylene moieties, equipped at the termini with two alkoxy chains of various lengths (n = 6, 8, 10, 12, 14). The liquid crystals exhibit a rich mesomorphism including smectic C, cubic, hexagonal and rectangular columnar phases, depending on the alkoxy chain length. The corresponding rhenium(I) complexes containing the bulky [ReBr(CO)3] fragment are not liquid-crystalline. The ligands and rhenium(I) complexes were investigated by scanning tunneling microscopy (STM). Both the ligands and the rhenium(I) complexes can be self-assembled into monolayers at the TCB–graphite and octanoic acid–graphite interfaces. The ligands and rhenium(I) complexes are luminescent.

Original languageEnglish
Pages (from-to)2172-2185
Number of pages14
JournalSoft Matter
Volume4
Issue number11
Early online date07 Aug 2008
DOIs
Publication statusPublished - 14 Oct 2008

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

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