<b>SYNTHESIS, CHARACTERIZATION AND THERMAL DEGRADATION OF OLIGO-2-[(4-IODOPHENYLIMINO)METHYL]PHENOL AND OLIGOMER-METAL COMPLEXES</b>

Abstract

ABSTRACT. The conditions for oxidative condensation of 2-[(4-iodophenylimino)methyl]phenol (IPIMP) were studied with air and NaOCl as oxidants in an aqueous alkaline medium between 50 and 90 °C. Size exclusion chromatography (SEC) showed that the number-average molecular weight (Mn), weight-average molecular weight (Mw) and polydispersity index (PDI) values, respectively, were 1250, 1300 g mol -1 and 1.040 for oxidation with NaOCl and 2200, 2500 g mol -1 and 1.136 for oxidation by air. With the optimum reaction conditions, the yield of OIPIMP was found to be 67 % with NaOCl, and 29 % with air, as oxidant. The OIPIMP was characterized by 1 H-NMR, 13 C-NMR, FT-IR, UV-Vis and elemental analysis. Metal complexes of the oligomer were shown to be more thermally stable than OIPIMP itself.

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. …”