Preparation of Novel Banana-Shaped Triple Helical Liquid Crystals by Metal Coordination
AbstractThe synthesis of a series of banana-shaped structures has been carried out, in which the bend unit is formed by a 4,4’-methylenedianiline or 3,3’-methylenedianiline core bearing two symmetric pyridylimine linkages to di- and tri- alkoxyphenylester moieties on the side arms. The molecules, in addition to providing an elongated aromatic central core associated with liquid crystal (LC) molecules, also provide binding sites for metals. The methylenedianiline spacer incorporates phenylene groups that sterically prevent the two binding sites from co-ordinating to a single metal centre and the central methylene unit introduces enhanced flexibility into the ligand backbone. Furthermore, complexes have been formed by the co-ordination between 3, 3’-methylenedianiline containing ligands and Cu (I) ions [Cu2(3a-c)2][PF6]2. Electrospray Mass Spectrometry (ESMS) and Fast Atom Bombardment Mass Spectrometry (FABMS) showed the formation of dimeric species; [Cu (L)2][PF6]2. Finally,thermal analysis of the ligands (1a-d, 2a-d, 3a-c and 4a-d) andCu complexes [Cu2(3a-c)2][PF6]2 has been carried out in order to investigate the phase properties of these materials. None of the banana-shaped ligands and the metal complexes [Cu2(3a-c)2][PF6]2 showed any mesophases. View Full-Text
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Iqbal, P.; Mayanditheuar, M.; Childs, L.J.; Hannon, M.J.; Spencer, N.; Ashton, P.R.; Preece, J.A. Preparation of Novel Banana-Shaped Triple Helical Liquid Crystals by Metal Coordination. Materials 2009, 2, 146-168.
Iqbal P, Mayanditheuar M, Childs LJ, Hannon MJ, Spencer N, Ashton PR, Preece JA. Preparation of Novel Banana-Shaped Triple Helical Liquid Crystals by Metal Coordination. Materials. 2009; 2(1):146-168.Chicago/Turabian Style
Iqbal, Parvez; Mayanditheuar, Manickam; Childs, Laura J.; Hannon, Michael J.; Spencer, Neil; Ashton, Peter R.; Preece, Jon A. 2009. "Preparation of Novel Banana-Shaped Triple Helical Liquid Crystals by Metal Coordination." Materials 2, no. 1: 146-168.