1373207-45-4

Upstream product

• 5419-55-6 Triisopropyl borate 
• 1373207-46-5 5-bromo-2-(decyloxy)benzonitrile 
• 7766-50-9 1-undecen-11-ylbromide 
• 40530-18-5 5-bromo-2-hydroxybenzonitrile 
• 112-29-8 1-bromo dodecane 

Downstream Products

• 1373207-47-6 (E)-4'-((4-(6-bromohexyloxy)phenyl)diazenyl)-4-(decyloxy)biphenyl-3-carbonitrile 
• 1373207-49-8 (E)-6-(4-((3'-cyano-4'-(decyloxy)biphenyl-4-yl)diazenyl)phenoxy)hexyl methacrylate 

Relevant academic research and scientific papers

Synthesis of vinyl-functionalized azobenzene mesogens and study of their liquid-crystalline behavior

Four vinyl-functionalized azobenzene-based liquid crystals (LCs) were synthesized and characterized by 1H and 13C nuclear magnetic resonance, and Fourier transform infrared spectroscopies. Their thermal stability was measured by thermogravimetric analysis and their thermotropic liquid-crystalline properties were determined by differential scanning calorimetry (DSC), polarized optical microscopy (POM), and X-ray diffraction (XRD). The azobenzene-based LCs displayed a nematic phase whereas those mesogens having an extra phenyl group developed lamellar mesophases of the SmA and SmC types. Combined with non-photoactive monomers, these vinyl-functionalized azobenzene-based mesogens can be used to prepare photo-active side-chain liquid crystal elastomers having potential use in optical actuators.

Liquid-crystalline polymers bearing phenylene(azobenzene) moieties substituted with an electron-donor or electron-acceptor lateral group. Synthesis, mesomorphic behavior and photo-induced isomerization

Methacrylic polymers bearing phenylene(azobenzene) moieties substituted with a OCH3 (electron-donor) or a CN (electron-acceptor) lateral group were synthesized and their liquid-crystalline (LC) and photo-induced isomerization properties were studied. The thermotropic LC properties were analyzed by DSC, POM, and XRD. All polymers showed a mesomorphic behavior that extends over wide temperature ranges (>100 °C) displaying smectic type mesophases. The effect of the lateral group was reflected in the packing of mesogens in the smectic phases; the polar interactions of the CN groups seem to counterbalance the hindering effects of this lateral group. On the other hand, the photoisomerization of all polymers was induced in dilute solution and films (spin coated and casted). All polymers photoisomerize relatively fast with the CN-substituted polymers reaching high cis-isomer contents (>95%) at the photostationary state. Light induced birefringence experiments indicated a tight interplay between the photo-induced orientation and the LC intrinsic order. Homogeneous sinusoidal surface relief gratings were obtained.