934823-82-2

Upstream product

• 117241-32-4 3,4,5-tris(dodecyloxy)benzaldehyde 
• 117241-30-2 ethyl 3,4,5-tri(dodecyloxy)benzoate 
• 831-61-8 Ethyl gallate 
• 123126-39-6 methyl [3,4,5-tris(n-dodecan-1-yloxy)]benzoate 
• 99-24-1 methyl galloate 
• 934823-80-0 2-(3,4,5-trisdodecyloxyphenyl)propan-2-ol 
• 143-15-7 1-dodecylbromide 

Relevant academic research and scientific papers

Flavylium Salts: A Blooming Core for Bioinspired Ionic Liquid Crystals

Thermotropic ionic liquid crystals based on the flavylium scaffold have been synthesized and studied for their structure-properties relationship for the first time. The mesogens were probed by differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and X-ray diffraction (XRD). Low numbers of alkoxy side chains resulted in smectic (SmA) and lamello-columnar (LamCol) phases, whereas higher substituted flavylium salts showed Colro as well as ordered and disordered columnar (Colho, Colhd) mesophases. Mesophase width ranged from 13 K to 220 K, giving access to room temperature liquid crystals. The optical properties of the synthesized compounds were probed towards absorption and emission properties. Strong absorption with maxima between 444 and 507 nm was observed, and some chromophores were highly emissive with quantum yields up to 99 %. Ultimately, mesogenic and dye properties were examined by temperature-dependent emissive experiments in the solid state.

Tuning the polarization along linear polyaromatic strands for rationally inducing mesomorphism in lanthanide nitrate complexes

The opposite orientation of the ester spacers in the rodlike ligands L4C12 (benzimidazole-OOC-phenyl) and L5C12 (benzimidazole-COO-phenyl) drastically changes the electronic structure of the aromatic systems, without affecting their meridional Incoordination to trivalent lanthanides, Ln111, and their thermotropic liquid crystalline (i.e., mesomorphic) behaviors. However, the rich mesomorphism exhibited by the complexes [Ln(L4C12)-(NO3)3] (Ln = La-Lu) vanishes in [Ln-(L5C12)(NO3)3], despite superimposable molecular structures and comparable photophysical properties. Density functional theory (DFT) and time-dependant DFT calculations performed in the gas phase show that the inversion of the ester spacers has considerable effects on the electronic structure and polarization of the aromatic groups along the strands, which control residual intermolecular interactions responsible for the formation of thermotropic liquid-crystalline phases. As a rule of thumb, an alternation of electron-poor and electron-rich aromatic rings favors intermolecular interactions between the rigid cores and consequently mesomorphism, a situation encountered for L4C12, L5C12, [Ln(L4C12)(NO3)3], but not for [Ln(L5 C12)(NO3)3]. The intercalation of an additional electron-rich diphenol ring on going from [Ln(L5C12)-(NO 3)3] to [Ln(L6C12)(NO3)3] restores mesomorphism despite an unfavorable orientation of the ester spacers, in agreement with our simple predictive model.