916902-72-2

Upstream product

• 461-82-5 4-(trifluoromethoxy)aniline 
• 108-95-2 phenol 

Downstream Products

• 140477-31-2 4-butoxy-4'-trifluoromethoxyazobenzene 
• 140477-30-1 4-trifluoromethoxy-4'-methoxyazobenzene 

Relevant academic research and scientific papers

Photo-responsive reversible micelles based on azobenzene-modified poly(carbonate)s via azide-alkyne click chemistry

Photo-induced reversible amphipathic copolymer PMPC-azo was click conjugated by connecting amphiphilic poly(ethylene glycol)-modified poly(carbonate)s (PEG-b-poly(MPC)) and azide-functional trifluoromethoxy-azobenzene (azo-N3). The resulting copolymer self-assembled into spherical micelles with a hydrophobic azo core stabilized by a hydrophilic PEG corona in aqueous solution. As characterized by time-resolved UV-vis spectroscopy, dynamic light scattering (DLS) and transmission electron microscopy (TEM), these micelles showed reversible self-assembly and disassembly in aqueous solution under alternating UV and visible light irradiation. The model drug Nile Red (NR) was then successfully encapsulated into the micelles. Light-controlled release and re-encapsulation behaviors were demonstrated by fluorescence spectroscopy. The cell cytotoxicity of PMPC-azo micelles was also evidenced by MTT assay. This study provides a convenient method to construct smart nanocarriers for controlled release and re-encapsulation of hydrophobic drugs. This journal is

Synthesis of liquid-crystalline poly(meth)acrylates with 4-trifluoromethoxy-azobenzene mesogenic side-groups

Side-group liquid-crystalline polymers with fluorine-containing mesogens were synthesized and characterized. 4-Trifluoromethoxy-aniline was diazotized and coupled with phenol to give 4-hydroxy-4'-trifluoromethoxy-azobenzene.Alkylation of this compound with α,ω-dibromoalkanes, followed by reaction with the potassium salts of acrylic or methacrylic acid, yielded the monomers.Their radical polymerization gave the corresponding polyacrylates or polymethacrylates, respectively.The polymers were characterized by size exclusion chromatography (SEC) and by differential scanning calorimetry (DSC). - Keywords: Liquid crystal polymer; 4-Trifluoromethoxy-azobenzene; Polyacrylates; Polymethacrylates

Mercapto-alkene clicking prepared fluorine-containing azo surfactant and method

The invention discloses a mercapto-alkene clicking prepared fluorine-containing azo surfactant and a method, and belongs to the technical field of functional surfactant synthesis. The fluorine-containing azo surfactant has a structural formula shown in the specification. The surfactant with a high purity and reversible responsiveness is obtained by a mercapto-alkene clicking chemistry method, andis used to realize reversible control of foams, a fluorine-containing alkyl group is introduced as a hydrophobic end, and an azobenzene group endows the surfactant with an excellent light control property.

Fluorine-containing azo surfactant and preparation method thereof

The invention discloses a fluorine-containing azo surfactant and a preparation method thereof, and belongs to the technical field of organic synthesis. The structural formula of the fluorine-containing azo surfactant is as shown in the description, wherein X is halogen, and n is equal to 1 or 2 or 3 or 4. According to the method, based on the excellent performance of fluorine-containing surfactants, the novel fluorine-containing azo photo-responsive surfactant is prepared, and thus the study field of the fluorine-containing surfactants is broadened.

Photo-responsive azobenzene type compound as well as synthetic method and application thereof

The invention discloses a photo-responsive azobenzene type compound as well as a synthetic method and an application thereof. The structural formula of the azobenzene type compound is shown in the description, and in the formula, R represents H, -(CH2)mCH3,-O(CH2)mCH3 or -O(CF2)mCF3, m is an integer from 0 to 6, n is an integer from 4 to 12, and R1 represents alkyl of C1-C4. The photo-responsive azobenzene type compound prepared according to the invention has special surface activity (amphipathicity) which can be simply regulated and controlled under the action of illumination and temperature, multiphase emulsion can be prepared by one-step emulsification of oil and water phases by only singly adopting the azobenzene type compound disclosed by the invention as a stabilizer, the multiphase emulsion cannot be subjected to phase separation due to irradiation of ultraviolet light, and the preparation method is simple and is suitable for various oil-water phase systems.

Method for preparing polyimide polymer with azo-pyrimidine structure unit

The invention relates to a method for preparing a diamine monomer with an azo-pyrimidine structure and a method for preparing a polyimide polymer by adopting the diamine monomer with the azo-pyrimidine structure. The preparation method comprises the following steps: carrying out a coupling reaction on 4-substituted aniline and sodium phenate to obtain 4-hydroxy-4'-substituted azobenzene; and carrying out nucleophilic substitution on the 4-hydroxy-4'-substituted azobenzene and dibromoalkane to generate bromo-azobenzene, and reacting the bromo-azobenzene with 4,6-diamido-2-mercaptopyrimidine to obtain the diamine monomer; and carrying out condensation polymerization on the diamine monomer with dianhydride to obtain polyimide. The pyrimidine structure is introduced into the diamine monomer, so that the charge transfer complex effect of aromatic rings of polyimide is reduced, and the glass transition temperature of the polyimide is reduced; and the azo group has photo-induced anisotropy, and an azo unit is introduced into the polyimide by alkyl chains having different lengths, so that the heterogeneous degree of the azo group can be effectively regulated, and the application of the polyimide in alignment films and other optical fields can be improved to a great extent.

FLUORINE-CONTAINING LIQUID CRYSTALS. XIV. POLYFLUOROALKOXYAZO- AND AZOXYBENZENES

Symmetrical and nonsymmetrical 4,4'-polyfluoroalkoxyazo- and azoxybenzenes have been synthesized, and their phase transition temperatures determined.Nonsymmetrical 4-polyfluoroalkoxyazo- and azoxybenzenes exhibit liquid crystalline properties.