Synthesis, characterization and electrical properties of polyimines derived from selenophene

Díaz, F. R.; Moreno, Jovita; Tagle, L. H.; East, Gastón A.; Radić, Deodato

doi:10.1016/s0379-6779(98)01484-2

Cited by 133 publications

(65 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The result in Figure 10 shows that electrical conductivity of SbP during coordination of iodine at 25 o C. Since nitrogen is an electronegative element and capable of coordinating with iodine molecule, Diaz et al suggested a conductivity mechanism of imine (HC=N-) polymers when doped with iodine. 29 Undoped polyazomethines and their derivatives have similar conductivity values from 10 -11 to 10 -9 S/cm and while doped with iodine ranges from 10 -7 to 10 -6 S/cm. The low conductivity values were attributed to the low degree of conjugation in the polymers caused by non-planarity of the polymer chains.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis, Characterization, Thermal Stability and Conductivity of New Schiff Base Polymer Containing Sulfur and Oxygen Bridges

Çulhaoğlu¹,

Kaya²

2015

Polymer Korea

View full text Add to dashboard Cite

In this study, we proposed to synthesize thermally stable, soluble and conjugated Schiff base polymer (SbP). For this reason, a specific molecule namely 4,4'-thiodiphenol which has sulfur and oxygen bridge in its structure was used to synthesize bi-functional monomers. Bi-functional amino and carbonyl monomers namely 4,4'-[thio-bis(4,1-phenyleneoxy)]dianiline (DIA) and 4,4'-[thiobis(4,1-phenyleneoxy)]dibenzaldehyde (DIB) were prepared from the elimination reaction of 4,4'-thiodiphenol with 4-iodonitrobenzene and 4-iodobenzaldehyde, respectively. The structures of products were confirmed by elemental analysis, FTIR, 1 H NMR and 13 C NMR techniques. The molecular weight distribution parameters of SbP were determined by size exclusion chromatography (SEC). The synthesized SbP was characterized by solubility tests, TG-DTA and DSC. Also, conductivity values of SbP and SbP-iodine complex were determined from their solid conductivity measurements. The conductivity measurements of doped and undoped SbP were carried out by Keithley 2400 electrometer at room temperature and atmospheric pressure, which were calculated via fourpoint probe technique. When iodine was used as a doping agent, the conductivity of SbP was observed to be increased. Optical band gap (E g ) of SbP was also calculated by using UV-Vis spectroscopy. It should be stressed that SbP was a semiconductor which had a potential in electronic and optoelectronic applications, with fairly low band gap. SbP was found to be thermally stable up to 300 o C. The char of SbP was observed 29.86% at 1000 o C.

show abstract

Section: Resultsmentioning

confidence: 99%

“…Iodine doping was carried out by exposure of the pellet to iodine vapor at atmospheric pressure and room temperature in a desiccators. 29 Measurements. The infrared spectra were measured by Perkin Elmer Spectrum One FTIR system.…”

Section: Methodsmentioning

confidence: 99%

Synthesis, Characterization, Thermal Stability and Conductivity of New Schiff Base Polymer Containing Sulfur and Oxygen Bridges

Çulhaoğlu¹,

Kaya²

2015

Polymer Korea

View full text Add to dashboard Cite

show abstract

“…9. Diaz et al [28] suggested the doping mechanism of Schiff base polymers. According to doping mechanism, nitrogen, being a very electronegative element, is capable of coordinating with an iodine molecule (Scheme 2).…”

Section: Electrochemical and Conductivity Propertiesmentioning

confidence: 99%

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

2017

View full text Add to dashboard Cite

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.

show abstract

“…In TGA curve of P-4-PCIBD, a weight loss of 14.5 % in the 50-150 ºC was assigned to the removal of absorbed water. Because of long conjugated band systems, polymer demonstrated higher resistance against high temperature than monomer [24][25][26]. Electrical properties of polymer and polymer-metal complexes: Polymer P-4-PCIBD and its metal complexes have conductivities in the range 10 -11 -10 5 S/cm.…”

Section: Ft-ir Analysismentioning

confidence: 99%

Characterization, Thermal Degradation, Electrical Conduction and Microbial Activity of Polymer and Its Polymer-Metallic Complexes

Gaur¹,

Jatolia²,

Mishra³

2017

Asian J. Chem.

View full text Add to dashboard Cite

Synthesis, characterization and electrical properties of polyimines derived from selenophene

Cited by 133 publications

References 32 publications

Synthesis, Characterization, Thermal Stability and Conductivity of New Schiff Base Polymer Containing Sulfur and Oxygen Bridges

Synthesis, Characterization, Thermal Stability and Conductivity of New Schiff Base Polymer Containing Sulfur and Oxygen Bridges

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

Characterization, Thermal Degradation, Electrical Conduction and Microbial Activity of Polymer and Its Polymer-Metallic Complexes

Contact Info

Product

Resources

About