Mesomorphism of Hybrid Siloxane-Triphenylene Star-Shaped Oligomers
Chemistry of Materials2007Vol. 19(8), pp. 1992–2006
Citations Over TimeTop 10% of 2007 papers
Abstract
Novel hybrid triphenylene-carbosiloxane liquid crystalline monomers and star-shaped oligomers have been synthesized and their thermal behavior and liquid-crystalline properties analyzed and characterized. All compounds exhibit a columnar hexagonal phase and show, particularly the oligomers, a small tendency to crystallize. The substitution pattern on the central triphenylene moiety has very different effects on the crystal to columnar phase and columnar to isotropic liquid-phase transitions. A novel sterically induced superlattice has been found, and a model for the microscopic structure is proposed. One compound could be mechanically aligned, leading to well-oriented columnar liquid crystals.
Related Papers
- → H-Bond-Stabilized Triphenylene-Based Columnar Discotic Liquid Crystals(2006)145 cited
- → Chemistry of discotic liquid crystals: from monomers to polymers(2014)138 cited
- → Structure and dynamics of tail-free discotic liquid crystals: Simulations of fluorinated triphenylene(2022)10 cited
- → Combination of Electron-deficient and Electron-rich Discotic Liquid Crystals in Novel Unsymmetrical Columnar Twins(2004)30 cited
- → Phase identification of triphenylene-based discotic monomer and its main chain polymers(1998)18 cited