Temperature-Dependent X-Ray Studies of Discotic Hexagonal Columnar Mesophases in Trinuclear Gold(I) Pyrazolate Complex

Gold(I) pyrazolate complex ([Au3Pz3]C10TEG) has been widely studied due to its interesting liquid crystalline properties by exhibiting the discotic hexagonal columnar arrangement. Generally, the liquid crystalline properties of the gold complex were confirmed based on their differential scanning calorimetry thermogram and polarized optical microscopy (POM) images. However, there is still no in-depth study on the phase transition in liquid crystals of [Au3Pz3]C10TEG especially on its structural change at variable temperature. In this study, the resulting liquid crystalline properties of [Au3Pz3]C10TEG upon being heated and cooled was extensively demonstrated via variable-temperature POM (VT-POM) and small angle X-ray scattering (VT-SAXS). Based on the VT-POM images, it was indicated that [Au3Pz3]C10TEG displayed a fan-shaped texture for typical arrangements of discotic hexagonal columnar of liquid crystals. Moreover, VT-SAXS results was in good agreement with the VT-POM images as it showed that [Au3Pz3]C10TEG might consist of two types of stacking system, which are ordered and disordered hexagonal discotic arrangements. Likewise, VT-SAXS analysis also demonstrated that hexagonal columnar mesophase of [Au3Pz3]C10TEG could be recovered even after the heating and cooling for two cycles.

Segregated co-assembly of fullerene-triphenylene hybrid dendrimers in columnar mesophases showing ambipolar charge transport

Liquid-crystalline dendrimers with donor triphenylene as the peripheral discotic mesogens and acceptor fullerene as the dendrimer core have been designed and synthesized with the aim of achieving heterojunction ambipolar charge...

Ion and hole dual-channel transport columnar mesomorphic organic electronic materials with high anisotropic conductivities based on supramolecular discotic ionic liquid crystals

Discotic ILCs via host–guest complexation of tris(18-crown-6)triphenylene and potassium trialkoxybenzenesulfonate in aligned columnar mesophases are capable of dual-channel transport showing both high ionic conductivities and hole mobilities.

Supramolecular organogels based on mesogenic 2,7-difunctionalized triphenylenes as a simple system for water content assessment in light alcohols

Self-assembly of di-hydroxylated triphenylenes in columnar mesophases and organogels depends on the spacer length and allows water quantification in alcohols.

Strikingly different molecular organization and molecular order of tetracatenar mesogens in columnar mesophases revealed by XRD and 13C NMR

XRD and 13C NMR investigations of four tetracatenar mesogens reveal lamellar mesophase for a lower homologs and centre rectangular/2D hexagonal columnar mesophases for higher homologs with strikingly different molecular orientations.

Ionic columnar clustomesogens: associations between anionic hexanuclear rhenium clusters and liquid crystalline triphenylene tethered imidazoliums

[Re6Se8(CN)6]4− clusters combined with imidazolium-anchored triphenylene generate phosphorescent columnar mesophases with good film-forming properties.

Order parameters and time evolution of mesophases in the lyotropic chromonic liquid crystal Sunset Yellow FCF by DNMR

Uniaxial order parameters of the nematic and columnar mesophases in the lyotropic chromonic liquid crystal Sunset Yellow FCF have been determined from deuteron nuclear magnetic resonance.