U. Caruso et al., Rigid-chain metallomesogenic polymers containing vanadyl or copper(II) ions coordinated in the main chain, J POL SC PC, 39(13), 2001, pp. 2342-2349
Citations number
15
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Rigid-chain metallomesogenic polymers containing Cu(II) or VO(II) were prep
ared and characterized. All the polymers were soluble and melted without de
composition. They showed a thermotropic liquid-crystal (LC) behavior, and t
he mesophases were invariably preserved for a long time at room temperature
in a metastable condition, with respect to the semicrystalline state. The
nature of the mesophases of the Cu(II)-containing polymers was similar to t
hat observed in analogous organic rigid-chain polymers having long lateral
alkyl chains packed as extended ribbons. The VO(II)-containing polymers sho
wed an LC polymorphism involving a smectic A and a nematic phase. For all t
he polymers in a smectic or smecticlike state at room temperature, X-ray di
ffraction data suggested short mean distances among the metal ions arranged
in layers. (C) 2001 John Wiley & Sons, Inc.