Thermal analysis of 4-[(4-chlorobenzyl)oxy]-4'-chloro-azobenzene dye, exhibiting liquid crystalline properties, was performed in dynamic air atmosphere. The compound behavior was investigated using TG, DTG, DTA and DSC techniques, under non-isothermal linear regime. The evolved gases were analyzed by FTIR spectroscopy. Kinetic parameters of the first decomposition step were obtained by means of multi-heating rates methods, such as isoconversioanl

This paper presents experimental data regarding the synthesis and the antimicrobial activity of new 4-phenylazo-phenoxyacetic acids. All compounds were characterized by IR, UV-Vis, mass spectral data and by elemental analysis. These compounds were tested for their antibacterial activity against Staphylococcus aureus, Streptococcus pyogenes, Escherichia coli, Pseudomonas aeruginosa, Proteus vulgaris and for their antifungal activity against Candida

A new synthesized 4CN type azomonoether, exhibiting dying properties, crystalline nature and generating interest as a material for non-linear optical applications was investigated. Modern devices incorporating liquid crystals tend to use thin films of such materials because of their special characteristics. Thermal stability studies are indispensable before attempting any deposition experiment. We have investigated the thermal behaviour of 4-[(4-chlorobenzyl)oxy]-4’-cyano-azobenzene

Thermal analysis of three azomonoethr dyes, exhibiting liquid crystalline properties, was performed in dynamic air atmosphere. Thermal stability studies and the evaluation of the kinetic parameters of each physical or chemical transformation are essential for a full characterization, before attempting accurate thin films' depositions of such materials used in non-linear optical applications. New synthesized dyes with general formula: ,where R is

Ten 4-[(4-chlorobenzyl)oxi]-azobenzenes were characterized by NMR and MS. The 1H NMR spectra showed a singlet integrating for two protons of methylen group and a multiplet for the aromatic protons. All these compounds were screened for their antibacterial activity against Staphilococcus aureus, Streptococcus pyogenes, Escherichia coli, Pseudomonas aeruginosa, Proteus vulgaris and for their antifungal activity against Candida albicans by disk diffusion

Using a Williamson method, ten new 4-[(4-chlorobenziloxy]-azobenzenes were prepared by condensation of 4-chloromethyl chlorobenzene with sodium salts of some 4-(phenylazo) phenols. These compounds were characterised by physical methods as UV-VIS and IR spectral analysis.

The synthesis of a novel azoderivatives, 4-(N-phenylacetamidoxy) azobenzenes and 4-(N-phenylacetamidoxy)-4'-(phenylazo) biphenyls, has been completed through the condensation of the sodium azophenoxydes with N-chloroacetylaniline, and those structures established through spectral analysis (UV–Vis, IR, 1H–NMR, GC–MS). The UV–Vis spectra explain the absorption bands from K type – conjugated system Ar–N=N–Ar, E or B type – л- electron

Using a original method, eleven new 4-(phenylazo) phenoxy acetic acids were prepared by condensation of chloroacetic acid with sodium salts of some 4-(phenylazo) phenols. These compounds, potentially physiological-active, were characterized by physical methods as UV-VIS and IR spectral analysis and the results were compared with those presented in literature for similar azoderivatives.