118468-29-4

Upstream product

• 629-04-9 1-Bromoheptane 
• 139-85-5 3,4-dihydroxybenzaldehyde 

Downstream Products

• 183787-63-5 (E)-3-(3,4-Bis-heptyloxy-phenyl)-acrylic acid 
• 131525-55-8 3,4-bis(heptyloxy)benzoic acid 
• 197632-17-0 3',4'-di-n-heptyloxy-4-stilbazole 

Relevant academic research and scientific papers

Photopolymerization of carbohydrate-based discotic mesogens. Synthesis and phase properties of 1,2,3,4,6-penta-O-(trans-3,4-dialkoxycinnamoyl)-(D)-glucopyranoses and their oligomers

The neat phase properties of the α and β anomers of 1,2,3,4,6-penta-O-(trans-3,4-dialkoxycinnamoyl)-(D)-glucopyranose (nαGP and nβGP; n, the number of carbon atoms in the alkyl chains, is 6-8, 10, and 14) have been investigated by optical microscopy, diff

Fabrication of deoxycholic acid tethered α-cyanostilbenes as smart low molecular weight gelators and AIEE probes for bio-imaging

Four novel deoxycholic acid tethered α-cyanostilbenes were designed, synthesized and characterized using detailed spectroscopic analysis. The synthesized deoxycholic acid tethered α-cyanostilbene derivatives formed stable gels with a variety of solvents,

Tuning the thermotropic properties of liquid crystalline p-substituted aroylhydrazones

The synthesis and mesomorphic properties of forty substituted aroylhydrazones with peripheral mono-, di- and tri- alkoxy chains derived from a p-amino aroylhydrazone core are described. The compounds with two side chains exhibited a smectic A phase, while the compounds with six soft alkoxy side chains at symmetrical positions formed a rectangular columnar mesophase. The structures of these mesophases were confirmed by differential scanning calorimetry (DSC) analysis, polarized optical microscopy (POM) and powder X-ray diffraction (XRD) studies. Raman studies with the help of density functional theory on some of the mesogenic members have been performed to understand the changes in the intermolecular interactions during phase transitions. A structure-property relationship has been deduced, and mesogenic properties are found to be dependent on the chain length, density and position of the alkoxy chains around the molecular core.

Self-assembly of hekates-tris(N -salicylideneaniline)s into columnar structures: Synthesis and characterization

Two series of new, photoluminescent star-shaped discotic liquid crystals, recently termed as "hekates", derived from tris(N-salicylideneaniline) s (TSANs), were synthesized by the facile threefold condensation of 3,4-bis(alkoxy)phenyl 4-aminobenzoates/3,4,5-tris(alkoxy) phenyl 4-aminobenzoates with 1,3,5-triformylphloroglucinol and characterized. These two series of discotics with six and nine peripheral n-alkoxy tails were especially designed and accomplished to understand the relation between mesomorphic/photophysical properties and molecular structure. Proton NMR spectral analysis revealed their existence as an inseparable mixture of two keto-enamine tautomeric forms featuring C3h and Cs rotational symmetries. A systematic study into the thermotropic liquid crystal behavior using polarizing optical microscopy, differential scanning calorimetry, and X-ray scattering confirmed the presence of columnar (Col) phase in vast majority of the TSANs prepared. The two-dimensional (2D) lattices of these fluid columnar phases were found to be characteristic of hexagonal Col (Col h), rectangular Col (Colr), or oblique Col (Col ob) phases depending on the number/length of the peripheral flexible chains. The stabilization of the Colob phase, a less commonly found fluid columnar structure, and the first of its kind in TSAN systems, implies very intensive intermolecular (face-to-face) interactions among the TSAN cores within the column. The photophysical properties were investigated both in solution and the columnar states by UV-vis absorption and photoluminescence; markedly, the solution state emits light in the blue region. The light-emitting ability of the Col phase is particularly significant given the possibility that, in such cores, the protons and electrons interact with each other through the H-bonding environment.

Discotic metallomesogens: Mesophase crossover of columnar rectangular to hexagonal arrangements in bis(hydrazinato) nickel(II) complexes

Three series of N-(3,4-dialkoxybenzylidene)-N′-(3′,4′,5′- trialkoxybenzoyl)hydrazine and their nickel(II) complexes, bis[N-(3,4-dialkoxybenzylidene)-N′-(3′,4′,5′- trialkoxybenzoyl)hydrazinato]nickel(II), were prepared and characterized. The mesomorphic properties of these disc-like compounds were also studied in terms of liquid crystallinity. The orange nickel(II) complexes with ten soft alkoxy side chains exhibited columnar disordered mesophases, which were characterized based on DSC analysis and optical polarized microscopy. Nickel complexes with shorter side chains (n = 5-8) displayed a monotropic columnar rectangular disordered (Colrd) phase; however, complexes with longer side chains showed monotropic (n = 10) and enantiotropic (n = 12, 14) columnar hexagonal disordered (Colhd) phases. Similar nickel complexes (n = 14) with eight side chains exhibited a columnar hexagonal phase, whereas complexes (n= 14) with six side chains formed crystalline phases. The structures of these columnar disordered phases were confirmed by X-ray powder diffraction. XRD data indicated that mesophase crossover from columnar rectangular (Colr) to hexagonal arrangements (Colh) was observed with increasing side chain lengths.

Liquid-crystalline complexes of palladium(II) and platinum(II) with di- and tri-alkoxystilbazoles: Ligand control of mesomorphism

Liquid-crystalline complexes of palladium and platinum are formed when the metals are complexed to stilbazoles (4-styrylpyridines) bearing either two or three alkoxy chains. The complexes, termed polycatenar, show smectic C mesophases for most 3,4-disubstituted ligands, while the use of trisubstituted ligands leads to complexes showing columnar organisation, demonstrating that the spatial organisation of the metals in the liquid-crystal mesophase can be rather readily controlled. Complexes of these di- and tri-substituted stilbazoles with a cis-dicarbonylchloroiridium(I) fragment were not liquid crystalline.

SYNTHESE EFFICACE DE COMPOSES AROMATIQUES POLYALCOXYLES

Obtaining liquid crystals like heteroaromatic salts and phasmids needs, as starting materials, substituted aromatic compounds.Rational synthesis of acetophenones, benzaldehydes, chalcones, benzoates... having alkoxy groups is presented.Alkylation of aroma