Synthesis, characterization and optimum reaction conditions of oligo-2-amino-3-hydroxypyridine and its Schiff base oligomer

Kaya, İsmet; Koça, Semra

doi:10.1016/j.polymer.2004.01.035

Cited by 31 publications

(17 citation statements)

References 12 publications

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“…The P-DEACIMP was washed with water for the separation from mineral salt. The polymers were dried at 60°C in an oven for 24 h [8,12,13].…”

Section: Scheme 1 Syntheses Of Schiff Bases and Their Polymersmentioning

confidence: 99%

“…Poly(azomethine)s including conjugated bonding and active hydroxyl group have been studied for more than 60 years, and used in several fields [8]. The oxidative polymerization method is simply the reaction of compounds including -OH groups and active functional groups (-CHO, -NH 2 , -COOH) in their structure with the oxidants like air oxygen NaOCl, H 2 O 2 an in the aqueous alkaline medium [9].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, characterization and electrochemical properties of poly(phenoxy-imine)s containing carbazole unit

2017

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Several new Schiff base polymers were synthesized via oxidative polymerization method in an aqueous alkaline medium in the presence of NaOCl as an oxidant and were confirmed by FT-IR, 1 H-NMR, 13 C-NMR and UV-Vis spectroscopic techniques. Furthermore, cyclic voltammetry measurements were carried out and the HOMO-LUMO energy levels and electrochemical band gaps (E g ′) were calculated. Additionally, the optical band gaps (E g ) were determined using their UV-Vis spectra of the materials. The morphologic properties of the polymers were investigated by scanning electron microscopy. In addition, the number average molecular weight (M n ), weight average molecular weight (M w ) and polydispersity index values of the polymers were determined by gel permeation chromatography technique. Electrical conductivity measurements of the doped (with iodine) and undoped polymer related to doping time were carried out by four-point probe technique using a Keithley 2400 electrometer. Their thermal behaviors were determined by TG-DTA and DSC measurements. The synthesized compounds were soluble in common solvents such as DMF, THF and DMSO. Photoluminescence properties of the polymers were determined in different concentrations of DMF solvent.

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“…The P-DEACIMP was washed with water for the separation from mineral salt. The polymers were dried at 60°C in an oven for 24 h [8,12,13].…”

Section: Scheme 1 Syntheses Of Schiff Bases and Their Polymersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and electrochemical properties of poly(phenoxy-imine)s containing carbazole unit

2017

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“…OIPIMP was synthesized via oxidative polycondensation of IPIMP with a solution of NaOCl (30 %, in water) and air as oxidants (Scheme 1) [11][12][13]. The IPIMP (0.200 g, 6.2 x 10 -4 mol) was dissolved in an aqueous solution of KOH (0.140 g, 2.48 x 10 -3 mol, 0.2 mL) heated to 40 °C and NaOCl was added drop by drop over about 20 min.…”

Section: Synthesis Of Oligo-2-[(4-iodophenylimino)methyl]phenol With mentioning

confidence: 99%

“…UV-Vis spectra were recorded from solutions in methanol and DMSO. IPIMP and OIPIMP in DMSO-d 6 at 25 °C were characterized by 1 H-NMR and 13 C-NMR spectra (Bruker AC FT-NMR spectrometer operating at 400 and 100.6 MHz, respectively). Tetramethylsilane was used as internal standard.…”

Section: Characterization Techniquesmentioning

confidence: 99%

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

Kaya

Moral

Özdemir

2009

Bull. Chem. Soc. Eth.

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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.

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Molecular weight monitoring of poly(2‐[[4‐(dimethylamino)benzylidene]amino]phenol) depending on polymerization conditions: investigation of thermal stability, antimicrobial properties, and conductivity enhancement

Baran

Saçak

2018

Adv Polym Technol

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A novel polyphenol with azomethine group, Poly(2‐[[4‐(dimethylamino)benzylidene]amino]phenol) P(2‐DBAP), was synthesized by oxidative polycondensation of 2‐[[4‐(dimethylamino)benzylidene]amino]phenol) (2‐DBAP) using NaOCl, H2O2, and O2 oxidants in aqueous alkaline medium. The effects of oxidant type and concentration, monomer concentration and polymerization temperature and time on yield and molecular weight distribution of P(2‐DBAP) were investigated. The structures of 2‐DBAP and P(2‐DBAP) were confirmed by UV‐Vis, FTIR, and 1HNMR techniques. Thermal behavior of the polymer was also analyzed by TG‐DTG techniques. Electrical conductivity value of P(2‐DBAP) which was doped with iodine for 24 hr at 60°C was measured as 7 × 10−2 S/cm by increasing 1010 fold compared with its undoped form. This conductivity level is the highest value reported in the literature for polyphenols containing azomethine group. Additionally, antimicrobial activities of 2‐DBAP and P(2‐DBAP) were tested against Sarcina lutea, Enterobacter aerogenes, Escherichia coli, Enterococcus Feacalis, Klebsiella pneumoniae, and Bacillus subtilis bacteria and Candida albicans and Saccharomyces cerevisiae fungi.

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Synthesis, characterization and optimum reaction conditions of oligo-2-amino-3-hydroxypyridine and its Schiff base oligomer

Cited by 31 publications

References 12 publications

Synthesis, characterization and electrochemical properties of poly(phenoxy-imine)s containing carbazole unit

Synthesis, characterization and electrochemical properties of poly(phenoxy-imine)s containing carbazole unit

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

Molecular weight monitoring of poly(2‐[[4‐(dimethylamino)benzylidene]amino]phenol) depending on polymerization conditions: investigation of thermal stability, antimicrobial properties, and conductivity enhancement

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