116223-44-0Relevant academic research and scientific papers
Use of intermolecular hydrogen bonding for the induction of liquid crystallinity in the side chain of polysiloxanes
Kumar, Uday,Kato, Takashi,Fréchet, Jean M. J.
, p. 6630 - 6639 (2007/10/02)
A new type of liquid crystalline side chain polysiloxane has been built through self-assembly via intermolecular hydrogen bonding between H-bond donor and acceptor moieties. Poly(methylsiloxanes) and poly(methyl-co-dimethylsiloxanes) with side chains cont
Mesomorphic metal complexes derived from 4-alkyloxystilbazoles
Bruce,Davis,Dunmur,Hudson,Maitlis,Styring
, p. 1 - 11 (2007/10/02)
The weakly mesomorphic trans-4-alkyloxy-4′-stilbazoles (n-OPhVPy) are readily synthesised from alkyloxyiodobenzenes and 4-vinylpyridine in a palladium-catalysed Heck reaction. While the highly symmetric palladium and platinum complexes trans-[MCl2(n-OPhVPy)2] show mesophases only at very high temperatures, the lower symmetry platinum complexes trans-[PtCl2(η2-olefin) (n-OPhVPy)] melt below 100°C. Similarly, the complexes [MCl(CO)2(n-OPhVPy)] (M = Rh, Ir) are low melting. The silver complexes [Ag(n-OPh VPy)2][X] (X = C12H25OSO3, C8H17OSO3, CF3SO3) can be obtained by direct reaction of the stilbazole with AgX. These ionic materials show a rich thermotropic polymorphism, including nematic and cubic mesophases. Some fluorinated stilbazoles have also been synthesised and complexed to silver; the mesomorphism of these complexes is also reported.
