940880-68-2

Upstream product

• 15872-42-1 4-heptyloxybenzoic acid 
• 95-01-2 2,4-Dihydroxybenzaldehyde 
• 40782-54-5 4-heptyloxybenzoyl chloride 
• 99-96-7 4-hydroxy-benzoic acid 
• 629-04-9 1-Bromoheptane 

Downstream Products

• 1208940-57-1 C₂₇H₂₉N₃O₅ 
• 1208940-35-5 C₂₃H₂₆N₄O₄ 
• 132329-27-2 4-Heptyloxy-benzoic acid 4-{[(E)-4-heptyl-phenylimino]-methyl}-3-hydroxy-phenyl ester 
• 132329-30-7 4-Heptyloxy-benzoic acid 4-{[(E)-4-decyl-phenylimino]-methyl}-3-hydroxy-phenyl ester 
• 132329-29-4 4-Heptyloxy-benzoic acid 3-hydroxy-4-{[(E)-4-nonyl-phenylimino]-methyl}-phenyl ester 
• 132329-26-1 4-Heptyloxy-benzoic acid 4-{[(E)-4-hexyl-phenylimino]-methyl}-3-hydroxy-phenyl ester 
• 108544-47-4 N-<4-(4-heptyloxybenzoyloxy)-2-hydroxybenzylidene>-4-butylanilide 

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, mesophase behavior and thermal stability of liquid crystals based on different central linkages with lateral substitution and terminal heterocyclic moieties

The synthesis and evaluation of thermal behavior of two new mesogenic homologous series of liquid crystalline compound containing 1,2,4-triazole and isonicotinic acid ring at the terminus of the molecule have been reported, viz. 3-hydroxy-4-[(4-1,2,4-triazol-4-ylimino)methyl] phenyl 4-alkoxybenzoate (Series-I) and 3-hydroxy-4 (isonicotinoyl carbonohydrazonoyl) phenyl 4-alkoxy benzoate (Series-II). The compounds of both the series have been characterized by elemental Analysis, FT-IR, mass spectrometry, 1H-NMR and 13C-NMR. Phase transition temperatures and the thermal parameters were obtained from differential scanning calarimetry (DSC). The texture observation was performed under polarizing optical microscopy (PMO) attached with Mettler hot stage. All the derivatives are mesomorphic in nature showing nematic phase as well as higher members of both the series show smectic phase. The use of triazole and isonicotinic acid as a terminal group has a very dramatic effect on the melting and clearing points. Similarly lateral-OH substitution on central phenyl ring shows higher clearing temperature due to intermolecular hydrogen bonding. The mesomorphic behavior has been analyzed in terms of structural property relation. Copyright Taylor & Francis Group, LLC.

Synthesis, characterization, and mesomorphic properties of new liquid-crystalline compounds involving ester-azomethine central linkages, lateral substitution, and a thiazole ring

In continuation with our work on liquid crystals with unconventional molecular structures, two homologous series that have 1,4-disubstitution and 1,3,4-trisubstitution in the central phenyl ring, such as 2[(4-n-alkoxy- benzyloxy) phenyl azomethine]-5-methyl thiazole and 2-[(4-n-alkoxy-benzyloxy)-2- hydroxy salicyladimine]-5-methyl thiazole, have been synthesized. They have been characterized by elemental analysis, FT-IR, 1HNMR, 13CNMR, and mass spectrometry. The liquid-crystalline behavior of these compounds was observed by differential scanning calorimetry (DSC) and polarizing microscopy. All the compounds of the 1,4-disubstituted series show an enantiotropic nematic phase only, whereas the compounds of the 1,3,4-trisubstituted series show smectic and nematic phases. Some mesogens with a lateral hydroxy group were also synthesized to evaluate the effect of this group on melting point, transition temperatures, and mesophase morphology.

NEW MESOMORPHIC DERIVATIVES OF 2-HYDROXY-4-BENZOYLOXYBENZENALDEHYDE

Synthesis and mesomorphic properties of 2-hydroxy-4-(4-alkyloxybenzoyloxy)benzylideneamines are presented.

Synthese de cristaux liquides nematiques a squelette rigide organometallique

Copper, nickel and palladium complexes with N-(4-(4'-n-alkoxybenzoyloxy) salicylidene)-4-n-butylaniline and N-(4-(4'-n-hexadecyloxybenzoyloxy) salicylidene)-4-n-alkoxyaniline have been synthesized.The copper and palladium derivatives show mesomorphic properties and exhibit a nematic phase over a large temperature range.In contrast, the nickel derivatives do not show any mesomorphic behavior.The liquid-crystalline-phase transitions were determined using a differential scanning calorimeter and a polarizing microscope.All these physical characteristics are compared and discussed.

New Liquid Crystalline Homologous Series Exhibiting the Smectic C Phase

A liquid cristalline homologous series of N--4-butylanilides and their hydroxyl derivatives at the 2-position were synthesized, and then the liquid-crystalline-phase transitions were determined using a differential scanning calorimeter and a polarizing microscope.All of the members exhibit a nematic phase, and a smectic C phase can be observed for the homologoues with a relatively long alkoxy chain.

The Preparation and Thermal Properties of Terminal Disubstituted N-(4-Benzoyloxybenzylidene)anilines

The homologous series of N--4-(2-methylbutoxy)aniline (1), and N-benzylidene>-4-n-alkoxyaniline (2), and N--4-(2-methylbutoxy)aniline (3) where the 2-methylbutoxyl group has an S-configuration, have been prepared.Series 1 and 2 form a chiral smectic C (S*C) phase in addition to a cholesteric (Ch) and a chiral smectic G (S*G) phases, and series 3 form (S*C) and Ch phases.