1353288-18-2

Upstream product

• 123-08-0 4-hydroxy-benzaldehyde 
• 5736-94-7 4-(hexyloxy)benzaldehyde 
• 111-25-1 1-bromo-hexane 
• 95-01-2 2,4-Dihydroxybenzaldehyde 
• 1353288-23-9 4-hexyloxybenzylhydrazone 
• 89027-80-5 4-hexyloxy-2-hydroxybenzaldehyde 

Relevant academic research and scientific papers

Synthesis, characterization and mesomorphic properties of unsymmetrical N-[4-(alkoxy)-2-hydroxybenzylidene]-N-(4-alkoxybenzylidene) azines and their copper (II) complexes

A new series of mesogenic unsymmetrical azines, N-[4-(alkoxy)-2- hydroxybenzylidene]-N-(4-n-alkoxybenzylidene) azines, ROC6H 4CHNNCHC6H3OHOR, where RCmH2 m+1 (m = 6, 8, 10, 12, and 14), and their copper (II) complexes has been synthesized. They were characterized by elemental analyses, Fourier transform infrared (FT-IR), 1H and 13C nuclear magnetic resonance (NMR) spectra, ultraviolet (UV)-visible, and magnetic susceptibility measurements. The copper (II) complexes are square planar. The mesomorphic properties of these compounds were investigated by differential scanning calorimetry and polarizing microscopy. The unsymmetrical azines with m = 6, 12, and 14 exhibit monotropic nematic, enantiotropic, and monotropic smectic A phases, whereas azines with m = 8 display enantiotropic nematic and m = 10 display both enantiotropic smectic A and nematic mesophases in the heating and cooling cycles. The copper (II) complexes of the azines are nonmesomorphic in nature with high clearing temperatures and displayed polymorphism (crystal-crystal transitions) in both the heating and cooling cycles.