Synthesis and characterization of a pyridine-containing Schiff base oligomer

Abstract

The oligomer of 4 (4 pyridylmethylideneimino)phenol was formed during oxidative poly condensation in aqueous alkaline medium using oxygen as the oxidant. Optimum conditions of the oxidative polycondensation and the main parameters of the process were found. The maximum yield of the oligomer was 52.4%. The product was characterized by elemental analysis, FT IR spectroscopy, UV Vis spectroscopy, and 1 Н NMR spectroscopy. The molecu lar weight distribution was determined by size exclusion chromatography. Thermogravimetric and differential thermal analyses were carried out for 4 (4 pyridylmethylideneimino)phenol and its oligomer.

Ketimine substituted polyphenol: Synthesis, characterization and investigation of its thermal and electrochemical properties

“…The loss of mass at the rate of 16.3% corresponds approximately to the sum of masses of OH ve CH 3 groups in the polymer structure. When the value of carbon residue at the rate of 83.7% which was obtained for poly(3‐PHEP) is compared with the values obtained for o ‐substituted,6, 17–30, 37 m ‐substituted7 and p ‐substituted8–15, 40, 41 poly(phenoxy‐imine)s in literature, it can be seen that the highest value belongs to poly(3‐PHEP). Having this feature, poly(3‐PHEP) step forwards in comparison with imine‐substituted polyphenols.…”

“…Imines polymers which have a lot of functionality groups can be used for cleaning poisonous heavy metals in industrial waste waters. So far, poly(phenoxy‐imine)s and their derivates have been synthesized by oxidative polycondensation method, and their properties have been extensively investigated,7–30 but surprisingly, synthesis of poly(phenoxy‐ketimine)s and their thermal properties have not been reported yet. …”

Synthesis, Characterization and Theoretical Calculation of 4-(((1h-Imidazol-2-Yl)methylene)amino)phenol

“…In this study, the synthesis (Scheme 1) characterization of 3 substances, which are thought to have active drug properties, was synthesized by the method of obtaining similar compounds, although the same substance is not found in the literature. [15,16]. The characterization of the synthesized structure was carried out and spectroscopic studies were supported by the DFT calculation method.…”