181469-72-7

Upstream product

• 95-71-6 2-methylbenzene-1,4-diol 
• 50-00-0 formaldehyd 
• 129236-97-1 1,4-bis(decyloxy)benzene 
• 112-29-8 1-bromo dodecane 
• 181470-24-6 2,5-didecyloxytoluene 

Downstream Products

• 1436378-08-3 2-bromo-5-(bromocyanomethyl)-1,4-bis(decyloxy)benzene 
• 1436378-12-9 2,3-bis(4-bromo-2,5-bis(decyloxy)phenyl)-but-2-enedinitrile 
• 1436378-09-4 2,3-bis(4-bromo-2,5-bis(decyloxy)phenyl)-but-2-enedinitrile 
• 1436378-07-2 2-cyanomethyl-1,4-bis(decyloxy)benzene 

Relevant academic research and scientific papers

Dicyano-substituted poly(phenylenevinylene) (DiCN-PPV) and the effect of cyano substitution on photochemical stability

A didecyloxy-substituted poly(phenylenedicyanovinylene), DiCN-PPV, has been synthesized. The dicyano-substituted vinylene units exist in both trans and cis (～65:35) conformations as determined by 1H NMR analysis, and cannot be converted to all trans due to the presence of a thermodynamic equilibrium of the two conformations, in contrast to the vinylene units in regular PPVs. The unusually high cis content makes this polymer highly amorphous, very soluble in organic solvent, and highly fluorescent in the solid state with an estimated quantum yield up to 0.34, four times more fluorescent than its chloroform solution. The LUMO and HOMO energies of the new polymer were measured by cyclovoltammetry. The cyano groups in DiCN-PPV brings a decrease in LUMO energy by 0.79 eV, and makes the polymer more stable to intense white light (>20 times as strong as the sunlight) than poly(2,5-didecyloxy-1,4- phenylenevinylene), C10O-PPV, by more than 2 orders of magnitude. The excellent photochemical stability and high fluorescence quantum yield in the solid state make DiCN-PPV a good candidate for outdoor fluorescent applications such as remote optical sensing.

Synthesis and liquid-crystalline properties of novel laterally connected twins: The influence of the connecting topology and the length of the rigid core

Laterally ligated p-terphenyl twins containing 2-oxapropylene spacers have been synthesized. Their liquid-crystalline properties were investigated by polarizing microscopy, calorimetry and X-ray scattering. The mesophase stability depends strongly on the topology of connection. It was found that the connection of the mesogenic units at the peripheries of the rigid cores gave twins with the highest clearing temperatures and the broadest smectic C (SC) ranges. Shifting the connecting units to the middle of the rigid cores diminished their mesophase stability. The X-ray investigations indicated that the thickness of the smectic layer was nearly independent of the position of the lateral connecting group when the same mesogens were linked. Also, twins incorporating a 1,4-disubstituted phenyl ring and a biphenyl rigid core have been prepared and they were found to exhibit broad mesomorphic ranges. Another kind of twins was obtained by the lateral-terminal connection of a p-terphenyl rigid core and a 2,5-diphenyl-1,3,4-thiadiazole calamitic unit. Again, a remarkable influence of the connecting position was observed.