Chemical Oxidative Synthesis and Characterization of Poly(8-hydroxyquinoline) Particles

Doğan, Fati̇h; Kaya, İsmet; Temizkan, Kevser

doi:10.1080/10601325.2014.967081

Cited by 13 publications

(8 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…18 At the start of the reaction, the 0.001 mol g-AM was dissolved in a 50 mL three neck ask containing aqueous KOH solution of 10%. 18 At the start of the reaction, the 0.001 mol g-AM was dissolved in a 50 mL three neck ask containing aqueous KOH solution of 10%.…”

Section: Methodsmentioning

confidence: 99%

Regioselective synthesis of polygamma (γ) acid

2015

Self Cite

View full text Add to dashboard Cite

The oxidative polymerization of 6-amino-4-hydroxy-2-naphthalenesulfonic acid in an aqueous alkaline medium leads to the formation of a polygamma (g) acid consisting of regioselective 1-4 oxazine rings.Spectral characterizations were performed by NMR, FT-IR, and UV-Vis techniques. The average molecular weight and polydispersity index of the gamma acid polymer (g-AP) were found to be 32 000 Da and 1.42, respectively. g-AP also presented an uncommon multicolored emission behavior in dimethylsulfoxide (DMSO). When excited at 405, 480, and 532 nm, g-AP emitted blue, green and yellow light, respectively. X-ray diffraction (XRD), differential scanning calorimetry (DSC), dynamic mechanical analyses (DMA), and transmission electron microscopy (TEM) illustrated that g-AP is composed of semicrystalline nanofiber structures with different lengths between 10-500 nm. The kinetic parameters related to the solid state thermal decomposition of g-AP were determined using differential isoconversional methods (Friedman and Kissenger) and integral isoconversional methods (FWO, KAS, Tang, Starink and Bosewell). By using the Tang, KAS, FWO, Starink, Bosewell, Kissenger and Friedman methods, the average values of the activation energies were calculated to be 184.4, 184.4, 185.4, 188.5, 183.6, 179.7 and 187.1 kJ mol À1 , respectively. The master plot curves also suggested a diffusion-type kinetic model for the solid state thermal decomposition stage of g-AP.

show abstract

Section: Methodsmentioning

confidence: 99%

Regioselective synthesis of polygamma (γ) acid

2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…This similarity assigned that OAQ consists of AQ repetitive units (26)(27)(28). The oxidation of the other quinoline monomers was studied and the similar diffraction spectra were obtained (8)(9)(10)(11). The morphology of product was investigated by SEM analysis.…”

Section: Insert Figure 9 Herementioning

confidence: 99%

“…Recently, we studied the oxidation of hydroxy functionalized quinoline monomers, 4-hydroxy quinoline (8), 5-hydroxy quinolone (9), 6-hydroxy quinoline (10) and 8-hydroxy quinolone (11) in various polymerization medium. The physical and chemical properties of polymerization products were reported.…”

Section: Introductionmentioning

confidence: 99%

Enzymatic synthesis of 5-amino quinoline oligomers and evaluation of their free radical scavenging activity

2017

Self Cite

View full text Add to dashboard Cite

The compound 5-aminoquinoline (AQ) was treated with horseradish peroxidase (HRP) and H2O2 in a reaction medium containing a dioxane:phosphate buffer mixture (70:30). Products (OAQ) with a degree of polymerization ranging from 4 to 12 were obtained. 1H NMR, FTIR, UV–vis, SEM, TG–DTA, DSC, XRD analysis, and conductivity measurements were conducted for characterization of OAQ. Compared with a monomer, OAQ showed higher thermal stability. After heating to 1000 °C, 46% of the initial weight of the OAQ remained. The antioxidant efficiencies of the monomer and oligomer were evaluated by the typical spectrophotometric method such as the bleaching of 2,2-diphenyl-1-picrylhydrazyl (DPPH) radicals. OAQ showed improved DPPH activity compared with the AQ monomer.

show abstract

“…A new series of (PAZ-E)s with changing ortho, meta and para positions were cleanly synthesized from diols of SBs. The chemical structures were successfully verified by 1 H-NMR, 13 CNMR and FTIR spectroscopies. Thermal analysis data showed that the obtained (PAZ-E)s had high thermal characteristics with T on between 198 and 250 • C. According to the TGA results, chars of (PAZ-E)s were also high, especially for P-14.…”

Section: Discussionmentioning

confidence: 93%

“…Aromatic imine polymers are known as strong capacity polymers with conductive properties, high thermal stability, high mechanical durability and good optoelectronic properties. It is difficult to obtain long molecular chains and consistent constructional and high molecular properties in polymers because they have low solubility in some solvents and more particularly as hope-inspiring materials with optoand photo-electronic applications [5][6][7][8][9][10][11][12][13][14]. Polyesters with aliphatic and ether groups as a part of the chain are more useful because of their high mechanical, electrical and thermal properties [15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, optical and electrochemical band gaps of green poly(azomethine-ester)s containing oxalyl and succinyl units

Temizkan

Kaya

2019

Bull Mater Sci

Self Cite

View full text Add to dashboard Cite

A new series of poly(azomethine-ester)s (PAZ-E)s with different (turning ortho, meta and para) positions were synthesized by condensation polymerization. The chemical structure of polymers was verified by 1 H-NMR, 13 C-NMR, FTIR and UV-Vis measurements. Electrochemical characteristics of the corresponding polymers were obtained with cyclic voltammetric (CV) analysis. Thermal characteristics of the obtained polymers were analysed by TG-DTA, DMA and DSC measurements. The first degradation temperature values of PAZ-E compounds were found between 198 and 250 • C from TGA measurements. Photophysical characteristics of the obtained polymers were explained with photoluminescence (PL) spectroscopy. Molecular weight distributions of (PAZ-E)s were obtained by gel permeation chromatographic (GPC) analysis. Two-and three-dimensional (2D and 3D) properties and images of the synthesized (PAZ-E)s were analysed by SEM and AFM surface analysis techniques, respectively. Electrochemical band gap (E g) values of (PAZ-E)s P-9, P-10, P-11, P-12, P-13 and P-14 were calculated as 2.58, 2.14, 1.90, 2.06, 1.89 and 1.69 eV, respectively. The E g values of the (PAZ-E)s were found to be quite low.

show abstract

Chemical Oxidative Synthesis and Characterization of Poly(8-hydroxyquinoline) Particles

Cited by 13 publications

References 33 publications

Regioselective synthesis of polygamma (γ) acid

Regioselective synthesis of polygamma (γ) acid

Enzymatic synthesis of 5-amino quinoline oligomers and evaluation of their free radical scavenging activity

Synthesis, characterization, optical and electrochemical band gaps of green poly(azomethine-ester)s containing oxalyl and succinyl units

Contact Info

Product

Resources

About