The synthesis, characterization and thermal stability of oligo-4-hydroxybenzaldehyde

Mart, Hasan; Yürük, Hüseyin; Saçak, Mehmet; Muradoğlu, Vefa; Vilayetoǧlu, Adalet R.

doi:10.1016/j.polymdegradstab.2003.08.003

Cited by 17 publications

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References 7 publications

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“…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%

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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Section: Introductionmentioning

confidence: 99%

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

2017

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“…8 -11 Recently, the OP reaction of salicylaldehyde and 4-hydroxybenzaldehyde was investigated by our research group. 12,13 In OP reaction the keeping of OOH and OCHO groups in the structure of O-3HBA is an important advantage because these groups can make the synthesis of different compounds, such as epoxy resins, Schiff base oligomers, copolymers etc, possible. For these reasons, in the present article, the synthesis, characterization, and thermal properties of O-3HBA are described.…”

Section: Introductionmentioning

confidence: 99%

“…The 13 C NMR spectrum of 3-HBA show peaks at 115, 122, 123, 131, 138, 158, and 194 ppm, respectively, indicating the seven carbon atoms of 3-HBA. Nevertheless, the 13 C NMR spectrum of O-3HBA was not clear but mainly composed of signals at 115, 123, 132, 138, 143, and 192 ppm. From these results, it can be clearly suggested that the peaks from 115 to 143 ppm of O-3HBA can be assigned to aromatic carbons and the peak at 192 ppm attributed to aldehyde group carbon.…”

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confidence: 96%

“…UV-vis spectrum (200 -800 nm) of HBA and O-3HBA were determined by using DMF. 3-HBA and O-3HBA were characterized using 1 H NMR and 13 C NMR spectra (Bruker AC FT-NMR 400 MHz spectrometer) recorded at 25°C using deuterated DMSO as solvent. The number average molecular weight (M n ), weight average molecular weight (M w ), and polydispersity index (PDI) were determined by GPC of HP 1100 from Agilent Technologies.…”

mentioning

confidence: 99%

“…To understand the structures of O-3HBA, the 13 C NMR spectrum of 3-HBA (Fig. 5) and O-3HBA was also received (Fig.…”

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The synthesis and thermal properties of oligo‐3‐hydroxybenzaldehyde synthesized by oxidative polycondensation

Mart

Sökmen

Yürük

2006

J of Applied Polymer Sci

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Polymerization of 3-hydroxybenzaldehyde was investigated by oxidative polycondensation (OP) method. No polycondensation reaction was observed both in acidic (in CH 3 COOH) and organic (in THF) media. Polycondensation was carried out with hydrogenperoxide (H 2 O 2 ) in an aqueous alkaline medium at 90°C. The product was characterized by 1 H NMR, 13 C NMR, FTIR, UV-vis, and elemental analysis. The number average molecular weight, mass average molecular weight, and polydispersity index values of O-3HBA were found to be 3600, 8000 g mol Ϫ1 , and 2.22, respectively. The product (O-3HBA) with reactive aldehyde and hydroxyl group was soluble in most polar organic solvents and was composed of phenylene units. Thermal properties of the oligomer were investigated by thermogravimetric analyses under an air atmosphere. The weight loss of O-3HBA was found to be 5 and 50% at 231 and Ͼ1000°C, respectively. The carboneous residue of the O-3HBA was 54% at 1000°C.

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

Demir

2012

J of Applied Polymer Sci

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Oxidative polycondensation of 3‐(1‐(2‐phenylhydrazono)ethyl)phenol (3‐PHEP) was studied using oxidants such as sodium hypochlorite, air (O2) and hydrogen peroxide in an aqueous alkaline medium under various polymerization conditions. The polymerization yield, molecular weight, solubility, and thermostability of the polymer were investigated. The macromolecular structure of the resulting polymer was characterized by elemental analysis, ultraviolet–visible, Fourier transform infrared, and nuclear magnetic resonance techniques. Thermogravimetric analysis showed poly(3‐PHEP) to be highly stable against thermo‐oxidative decomposition. Mass loss of the polymer was found to be only 16.3% at 1000°C. In addition, the highest occupied molecular orbital–lowest unoccupied molecular orbital energy levels, electrochemical (Eg′) band gaps and optical (Eg) band gaps were calculated from cyclic voltammetry and ultraviolet–visible measurements, respectively. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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The synthesis, characterization and thermal stability of oligo-4-hydroxybenzaldehyde

Cited by 17 publications

References 7 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

The synthesis and thermal properties of oligo‐3‐hydroxybenzaldehyde synthesized by oxidative polycondensation

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

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