3246-66-0

Upstream product

• 123-08-0 4-hydroxy-benzaldehyde 
• 100-01-6 4-nitro-aniline 

Downstream Products

• 151358-47-3 3,3'-((4-hydroxyphenyl)methylene)bis(1H-indole) 

Relevant academic research and scientific papers

Synthesis of novel Schiff Bases containing acryloyl moiety and the investigation of spectroscopic and electrochemical properties

A novel Schiff bases and their acryloyl derivatives were synthesized through the reaction of p-hydroxybenzaldehyde in order of with aniline, p-chloroaniline, p-nitroaniline, p-methylaniline and p-aminobenzoic acid. The structures of these compounds were characterised spectroscopic techniques such of IR, 1H NMR, 13C NMR and Mass spectroscopy. π→π?and n→π?transitions were determined via UV-vis spectroscopy studies performed in EtOH, CHCl3, and DMF. Furthermore, the inhibition efficiencies of these new compounds were investigated on the surface of steel within the solution of 0.1 M NaCl, 0.1 M NaOH and 0.10 M H2SO4 solution via cyclic voltammetry and Tafel extrapolation methods.

Synthesis, characterization, structural optimization using density functional theory and superoxide ion scavenging activity of some Schiff bases

Four Schiff bases, 2-[(4-nitro-phenylimino)-methyl]-phenol (NPIMP-2), 4-[(4-nitro-phenylimino)-methyl]-phenol (NPIMP-4), (1H-indol-3-ylmethylene)-(4-nitro-phenyl)-amine (IYNPA), (3-nitro-benzylidene)-(4-nitro-phenyl)-amine (NBNPA) with experimental clue of binding with superoxide ion have been synthesized by the condensation of p-nitroaniline with o-hydroxy benzaldehyde, p-hydroxybenzaldehyde, indole-3-carboxaldehyde and m-nitrobenzaldehyde respectively. These were characterized by IR, 1H NMR, CHN, mass spectroscopy and UV-visible spectroscopy. The Schiff bases thus synthesized exhibited evidence for their binding with superoxide ion in the form of a high intensity charge transfer band beyond 500 nm in their respective UV-vis spectra on the addition of two drops of N/10 NaOH to their respective 10-2 M solutions in DMSO. On further addition of two drops of N/10 HCl solution, the charge transfer band vanished and the original spectral pattern of the Schiff bases in DMSO was observed. Out of the four Schiff bases, the binding of NPIMP-4 with O2- was observed to be reversible throughout both the cycles of measurements, but the remaining Schiff bases, namely NPIMP-2, IYNPA and NBNPA were found to show reversibility in only one cycle. The variable temperature 1H NMR (RT-175 °C) in DMSO-d6 revealed reversible intramolecular proton transfer in NPIMP-2 and NPIMP-4 leading to existence of several tautomeric structures. Besides these synthetic and spectroscopic studies, the density functional theory (DFT) calculations were performed for two Schiff bases i.e., NPIMP-2 and NPIMP-4. These calculations provided some important information about the relative stability of various tautomeric forms of NPIMP-2 and NPIMP-4.

Molecular alignment and thermal stability of liquid-crystalline phases in binary mixtures of electron donor and acceptor

The molecular alignment and thermal stability of the mixtures DA composed of two different kinds of Schiff base liquid-crystalline materials, D with an electron-donating -N(CH3)2 unit and A with an electron-withdrawing-NO2 unit, were investigated by using DSC, POM, XRD, and FT-IR measurements. The mesophases of the mixtures DA were more stable and had wider temperature ranges than those of the individual compounds D and A. The mixture DA55 (D:A=50:50 mol%) on cooling exhibited the most stable liquid-crystalline phases affording the highest TSI (119°C), the widest temperature range of the smectic phase (46.4°C) and the highest values of ΔSSI (26.1 J K-1 mol-1) among the mixtures DA examined. Based on the analysis of the XRD measurements and the temperature dependence on the FT-IR spectra, the molecular packing of the mixture DA55 was proposed to form a bilayer structure in the smectic A phase, in which the heading group of the compounds D and A overlapped partially. The induction of the smectic phase and the enhanced thermal stability for the mixtures DA would be caused by the intermolecular interaction between the electron donor and acceptor mesogens.

Synthesis of 4-O- azomethino-D-glucopyranosides

The interaction of 2,3,4,6-tetraacetyi-α-D-glucopyranosyl bromide with potassium salt of 4-hydroxybenzylideneanilines under anhydrous conditions and freezing temperature gives benzylideneaniline tetraacetyl-4-O-D- glucopyranosides and corresponding 4-O-be

Mesomorphic Properties of Some Nitro Substituted Azomethines

The homologous series of 4'-n-alkoxybenzylidene-4-nitroanilines (I) and 4"-n-alkoxybenzylidene-4'-amino-4-nitrobiphenyls (II) have been synthesized and their mesomorphic properties investigated.Generally, the alkoxybenzylidenenitroanilines show only monot