62808-19-9

Upstream product

• 21643-38-9 4-hexylbenzoic acid 
• 123-08-0 4-hydroxy-benzaldehyde 
• 50606-95-6 4-hexylbenzoyl chloride 

Downstream Products

• 104333-22-4 4-Hexyl-benzoic acid (2R,4aR,8aS)-4-(hexahydro-benzo[1,3]dioxin-2-yl)-phenyl ester 

Relevant academic research and scientific papers

Effect of the Functional Groups of Racemic Rodlike Schiff Base Mesogens on the Stabilization of Blue Phase in Binary Mixture Systems

Four series of rodlike racemic Schiff base mesogens possessing different alkyl chains and two types of linkages, ester and alkynyl linkages, were synthesized and applied to induce cubic blue phases (BPs) in simple binary mixture systems. The mesophases of these Schiff base mesogens were confirmed by variable-temperature X-ray diffraction and the characteristic texture from polarized optical microscopy (POM). In general, when chiral additive S-(+)-2-octyl 4-(4-hexyloxybenzoyloxy)benzoate (S811; 20-40 wt %) is added into the rodlike racemic salicylaldimine-based mesogens, the cubic BPs could be observed and its temperature range is larger than 20 K. The widest temperature range of the cubic BP (35 K) can be observed in the blending mixture composed of rodlike racemic salicylaldimine-based mesogen OH-TIn possessing alkynyl linkage and 35-40 wt % S811. However, Schiff base mesogens possessing alkynyl linkage show a direct isotropic to chiral nematic transition when equal amount of chiral dopant is added. Notably, the termination temperature of BPs is very close to room temperature (ca. 35 °C) after 40.0 wt % S811 is added into the salicylaldimine-based mesogens possessing terminal alkyl chains and ester linkage. Interestingly, wide BPs (>30 K) can also be induced by adding chiral additive 1,4:3,6-dianhydro-2,5-bis[4-(n-hexyl-1-oxy)benzoic acid]sorbitol (ISO(6OBA)2) with a high helical twisting power into the racemic Schiff base mesogen possessing ester linkage. Cubic BPI and BPII can be confirmed by reflectance spectra and POM. The results of reflectance spectra indicate that the binary mixture composed of salicylaldimine-based mesogens and S811 easily exhibits a supercooling effect and induces BPI. However, only BPII can be observed in all binary mixtures containing Schiff base mesogens. On the basis of our experimental results and molecular modeling, we suppose that the values of biaxiality, polarizability, and the dipole moment of molecular geometry are the main factors that affect BP stabilization.

Synthesis and mesomorphic properties of fluorinated Schiff's base esters containing alkyl and alkoxy end groups

Two series of fluorinated Schiff's base esters have been synthesized and characterized. Their chemical structures were identified by FTIR, 1H NMR, and elemental analysis (EA). Their mesomorphic properties were studied by polarizing optical, microscopy (PO

The synthesis and mesomorphism of mesogenic imines with fluorocarbon chains and their complexes with rhenium(I): New materials with cubic phases

In this paper, we describe the synthesis of some imine ligands bearing fluorinated chains and their metal complexes with Re(I). Whereas related ligands with hydrocarbon chains show nematic and SC phases, the new ligands show SA and S

Liquid-Crystalline Heterocycloalkanes. III. Synthesis and Liquid-Crystalline Properties of Substituted 1,3-Dioxadecalines

Liquid-crystalline 2-substituted and 2,6-disubstituted 1,3-dioxadecalines (4-6) were synthesized by acid-catalyzed acetalization of trans-2-hydroxymethylcyclohexanol (1) or trans-4-alkyl-trans-2-hydroxymethylcyclohexanoles (2) with aldehydes 3 whereby the desired trans-isomers were formed only.The syntheses of the various aldehydes are also described.Special attention is drawn on the evolution of mesogenic properties of the title compounds 4-6 in comparison with known decalines and 1,3-dioxanes.It was found that the clearing temperatures of the synthesized 1,3-dioxadecalines are always lower than those of the corresponding decaline derivatives, due to the deformation of the decaline-ringsystem by the introduction of two oxygen-atoms.The comparison of 1,3-dioxanes and 1,3-dioxadecalines shows that the dioxadecaline ringsystem tends to suppress smectic mesophases in favour of nematics.A first example of a liquid crystalline cis-fused 1,3-dioxadecaline (8) is described, too.