2497-41-8

Upstream product

• 556-18-3 4-aminobenzaldehyde 
• 108-95-2 phenol 
• 99-99-0 1-methyl-4-nitrobenzene 
• 272786-88-6 1-(N-butylamino)-4'-nitrobenzylphosphonic acid 
• 63207-57-8 1-amino-4'-nitrobenzylphosphonic acid 

Downstream Products

• 3516-77-6 4'-methoxyazobenzene-4-carbaldehyde 
• 106038-68-0 4-[4-(trans-2-Nitro-vinyl)-phenylazo]-phenol 
• 69578-28-5 4-(4-thiazolidin-2-yl-phenylazo)-phenol 
• 42419-32-9 2-[4-(4-hydroxy-phenylazo)-phenyl]-thiazolidine-4-carboxylic acid 
• 69578-34-3 4-(4-{[(E)-2-Methylsulfanyl-ethylimino]-methyl}-phenylazo)-phenol 
• 42561-63-7 2-[4-(4-hydroxy-phenylazo)-phenyl]-3-methyl-thiazolidine-4-carboxylic acid 
• 91955-16-7 4-((4-(hydroxymethyl)phenyl)diazenyl)phenol 

Relevant academic research and scientific papers

Mesogenic 4-(ω-hydroxyalkoxy)-4′-formylazobenzenes

Homologs from a series of 4-(ω-hydroxyalkoxy)-4'-formylbenzenes (C2,C3,C4,C6 ,C8) were synthesized. All compounds obtained show properties of thermotropic nematic liquid crystals. The effect of the te

Liquid crystal of ethyl and propyl aromatic aldehyde with azo core and photosensitivity in mesophase

Eight new stable rod-like aromatic aldehyde liquid crystalline molecules with azo bridge have been prepared, in which single or double six-membered carbon ring carboxylic acid mesogenic cores with shorter alkyl chain of ethyl, n-propyl were condensed with hydroxyl azo benzaldehyde. These compounds have been characterized by their spectral data, DSC and HS-POM. These molecules were expected to exhibit liquid crystal phase so that the influence of UV-light on their textures of mesophase could be detected. The results showed that all these target compounds have the temperature range of mesophase between 101 and 145°C. After irradiating under UV-light, they exihibited photo-sensitivity not only in methanol but also in mesophase.

Synthesis, photo-sensitive and electrochemical properties of rod-like aromatic aldehyde with azo bridge

Eight new rod-like liquid crystal molecules composed by a long rigid core of three six-member rings (cyclohexane ring or benzene ring), azo, ester and terminal aldehyde groups have been prepared. These rod-like liquid crystalline molecules were designed to construct new structures to further study photo-isomerization in their mesophases. All the compounds have been characterized based on their basic spectral data, differential scanning calorimeter (DSC) and hot stage polarizing optical microscope (HS-POM). The result showed that all the molecules, even those with the shortest terminal methyl group, have liquid crystalline properties. Their mesophases are nematic within the temperature ranges from 85 to 145°C. They exhibit photo-sensitivities not only in methanol solutions but also in a mesophase when exposed to UV light. The highest occupied orbital (HOMO) and the lowest unoccupied orbital (LUMO) and the differences between the frontier molecular orbitals (Eg) of these compounds were determined by cyclic voltammetry. The effect of even-odd carbon number of the terminal straight alkyl chain on the UV spectral data and the Eg were observed. The difference between the Eg of these compounds are in excellent agreement with the difference of their maximum absorption wavelength in UV spectra.

LIQUID CRYSTALLINE COMPOUND, LIQUID CRYSTALLINE COMPOSITION, ANISOTROPICALLY LIGHT-ABSORBING FILM, AND LIQUID CRYSTAL DISPLAY DEVICE

Provided is a novel azo liquid-crystal compound that is capable of orientation with a high degree of orientation order The liquid-crystal compound denoted by general formula I) below:wherein each of R1 and R2 denotes a hydrogen atom,

Preparation, structures, and properties of new monocarbenium ion compounds stabilized by a 3-Guaiazulenyl group and an azobenzene unit: Comparative studies on three delocalized π-electron system

Reaction of guaiazulene (=7-isopropyl-1,4-dimethylazulene) with 4-hydroxyazobenzene-4-carbaldehyde in methanol in the presence of hexafluorophosphoric acid at 25°C for 2 h gives as high as 94% yield of a new monocarbenium ion compound (3-guaiazulenyl)[4-(

Nitrobenzyl (α-amino)phosphonates. Part 2[1]. Cleavage of 4-nitrobenzyl(α-amino)phosphonic acids in aqueous sodium hydroxide solution

4-Nitrobenzyl(α-amino)phosphonic acids treated with an excess of aqueous sodium hydroxide undergo a C-P bond cleavage and subsequent transformation into a mixture of azoxybenzene and azobenzene derivatives. The observed cleavage is an example of the intramolecular redox reaction. The phosphonate moiety is oxidized to phosphate, and the remaining part of the molecule is reduced to azoxybenzene derivative 2. After acidification of the reaction mixture two main products were isolated; 4,4′-diformylazoxybenzene (3) and 4-formyl-4′-hydroxyazobenzene (4). The product 4 was probably formed as a result of the Wallach type rearrangement of 3.

MESOGENIC N--4-CYANOANILINES

The conditions for the production of N--4-cyanoanilines were studied in order to optimize the synthesis in relation to the chain lenght of the alkoxy group.Eight mesogenic compounds (n = 3-10), forming nematic and smectic