Polarity in Liquid Crystals Formed by Self-Assembled Umbrella-Shaped Subphthalocyanine Mesogens.

We investigated the properties of p-type semiconducting columnar phases in self-assembled umbrella-shaped mesogens that have subphthalocyanine cores and oligo-thienyl arms. These compounds have nonswitchable phases that exhibit remanent electric polarization and nonlinear optical activity. Additionally, these compounds can generate photocurrents in the visible spectral range due to their wide absorption band.

Tackling Disorder in γ-Ga O.

Ga O and its polymorphs are attracting increasing attention. The rich structural space of polymorphic oxide systems such as Ga O offers potential for electronic structure engineering, which is of particular interest for a range of applications, such as power electronics. γ-Ga O presents a particular challenge across synthesis, characterization, and theory due to its inherent disorder and resulting complex structure-electronic-structure relationship.

Small compound - big colors: synthesis and structural investigation of brightly colored alkaline earth metal 1,3-dimethylviolurates.

A series of brightly colored alkaline earth metal 1,3-dimethylviolurates M(MeVio) have been prepared and fully characterized. The title compounds AE(MeVio)·HO (AE = Mg, = 6 (3); AE = Ca, = 8 (4), AE = Sr, = 6 (5); AE = Ba, = 4 (6)) were obtained by neutralizing 1,3-dimethylvioluric acid monohydrate (=H(MeVio)·HO; 2) with 0.5 equiv.

Rubidium and Cesium Enediamide Complexes Derived from Bulky 1,4-Diazadienes.

The first rubidium and cesium enediamide complexes based on bulky 1,4-diaza-1,3-diene ligands (DADs) have been prepared by metalation of either 1,4-bis(2,6-diisopropylphenyl)-1,4-diaza-1,3-butadiene (, = DAD) or 1,4-bis(2,6-diisopropylphenyl)-2,3-dimethyl-1,4-diaza-1,3-butadiene (, = DAD) with an excess of Rb or Cs metals in coordinating solvents such as tetrahydrofuran (THF) or 1,2-dimethoxyethane (DME). All new complexes were fully characterized by spectroscopic and analytical methods as well as single-crystal X-ray diffraction studies.

Catenated and spirocyclic polychalcogenides from potassium carbonate and elemental chalcogens.

The reaction of potassium carbonate with elemental sulfur or selenium in acetone in the presence of [PPN]Cl (PPN = (PhP)N) produces catena-[S], the longest structurally characterised polysulfide dianion, or spiro-[Se] as ion-separated [PPN] salts.