Ali Bilici

Synthesis, Characterization and Thermal Degradation of Oligo‐2‐[(4‐hydroxyphenyl) Imino Methyl]‐1‐naphtol and Oligomer‐Metal Complexes

The oxidative polycondensation of 2‐[(4‐hydroxyphenyl) imino methyl]‐1‐naphtol (4‐HPIMN) has been accomplished by using NaOCl, H2O2 and air O2 oxidants in aqueous alkaline medium. Optimum reaction conditions of the oxidative polycondensation and the main parameters of the process were established. At optimum reaction conditions, yield of the products were found to be 77.0%, 91.6% and 99.0% for H2O2, air O2 and NaOCl oxidants, respectively. The structures of the obtained monomer and oligomer were confirmed by FT‐IR, UV‐Vis, 1H‐ and 13C‐NMR and elemental analysis. The characterization was made by TG‐DTA, SEC and solubility tests. The 1H‐ and 13C‐NMR data shows that the polymerization proceeded by the C–C coupling of ortho positions according to –OH group of 4‐HPIMN. The molecular weight distribution values of the product were determined by using size exclusion chromatography (SEC). The number‐average molecular weight (Mn), weight‐average molecular weight (Mw) and polydispersity index (PDI) values of O‐4‐HPIMN were found to be 1777, 2225 and 1.252; 1790, 2250 and 1.257; 4540, 5139 g mol−1, and 1.132 for NaOCl, H2O2 and air O2 oxidants, respectively. According to TG analyses, the carbonaceous residue of 4‐HPIMN and O‐4‐HPIMN was found to be 28.02% and 44.22% at 1000°C, respectively. Thermal analyses of O‐4‐HPIMN‐Cd, O‐4‐HPIMN‐Co, O‐4‐HPIMN‐Cu, O‐4‐HPIMN‐Fe, O‐4‐HPIMN‐Mg, O‐4‐HPIMN‐Mn, O‐4‐HPIMN‐Ni, O‐4‐HPIMN‐Pb and O‐4‐HPIMN‐Zn oligomer‐metal complex compounds were investigated in N2 atmosphere between 15–1000°C.

Biosynthesis and characterization of organosoluble conjugated poly(2-aminofluorene) with the pyrazine bridged.

In this paper, the results on horseradish peroxidase (HRP)-catalyzed oxidative polymerization of amine-functionalized fluorene monomer, 2-amino fluorene (AF), are reported. The resulting polymer exhibits an exciting molecular structure and spectral properties. FT-IR and NMR studies show that the two fluorene units come together by forming an intermediate six-membered pyrazine ring and these formed dimeric units are linked to the each other through C-C couplings to produce fully conjugated polymer structure (AFP). Further characterizations were performed by means of GPC, TGA, DSC, SEM, CV (cyclic voltammetry), fluorescence analyses, and solubility tests. Optical band gaps of this electroactive polymer was found to be 2.60 eV. AFP emits red light and its emission maxima is drastically affected by the kind of the solvents used. In addition, obtained polymer is soluble in common polar and apolar organic solvents.