70139-17-2

Upstream product

• 1878-68-8 2-(4-bromophenyl)-acetic acid 
• 99-76-3 methyl 4-hydroxylbenzoate 
• 100-66-3 methoxybenzene 
• 63186-92-5 2-(4-bromophenyl)-1-(4-hydroxyphenyl) ethanone 
• 40782-53-4 4-octyloxybenzoic acid chloride 
• 2493-84-7 p-octyloxybenzoic acid 
• 67205-73-6 2-(4-bromophenyl)-1-(4-methoxyphenyl)-1-ethanone 
• 629-27-6 1-Iodooctane 
• 37859-24-8 2-(4-bromophenyl)acetyl chloride 
• 70139-13-8 (E)-benzoic acid 4-octyloxy-4-<2-(4-bromophenyl)ethyl>phenyl ester 
• 127317-42-4 2-(4-bromophenyl)-1-(4-hydroxyphenyl) ethanol 
• 62435-37-4 methyl 4-(octyloxy)benzoate 
• 16807-63-9 (E)-4-<2-(4-bromophenyl)ethenyl> phenol 

Relevant academic research and scientific papers

Smectic-smectic phase transitions in binary liquid-crystalline mixtures of DB5-T8

We have used high-resolution x-ray diffraction and ac calorimetry to study the liquid-crystalline smectic-A-smectic-A phase transitions in binary mixtures of polar mesogenic compounds DB5 phenyl ester> and T8 ethenyl> phenyl ester>.A detailed synthesis for each of these compounds is presented.The smectic A1 phase in this system shows two collinear diffuse x-ray maxima at incommensurate wave vectors, indicating a tendency to form the predicted Ai1 phase with two strongly coupled density modulations having incommensurate wavelengths.The Ad peak position, while both temperature and concentration dependent, is remarkably constant along the N-Ad phase boundary.In the vicinity of 16 mol percent T8, both the x-ray and heat-capacity results are reproducibly history dependent.The simultaneous observation of sharp A2 and Ad peaks most likely results from phase coexistence, but a condensed incommensurate Ai2 phase cannot be ruled out.