- Thamar yemen
Ain Shams university - +201270854580
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Thamar University, Chemistry Department, Faculty Member add
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I have published more than twenty-five peer-reviewed papers in local and international scientific journals. The resea... moreI have published more than twenty-five peer-reviewed papers in local and international scientific journals. The research field in which I am interested in is twofold: conducting Polymer chemistry and anticancer organic drug. edit
The chemical functionalization of amino multiwalled carbon nanotubes (MWCNT-NH2) by selenium dioxide (SeO2) was used to produce Poly [MWCNT/Imidoselenium] nanocomposite. The obtained poly-composite was characterized by FT-IR, UV-Vis, XRD,... more
The chemical functionalization of amino multiwalled carbon nanotubes (MWCNT-NH2) by selenium dioxide (SeO2) was used to produce Poly [MWCNT/Imidoselenium] nanocomposite. The obtained poly-composite was characterized by FT-IR, UV-Vis, XRD, TEM, SEM, TGA, DSC and DC electrical conductivity. The characteristic peaks in FT-IR and UV-Visible spectra were found shifted to higher wave numbers, and the n-π* bands were shifted to lower wavelengths (red shift), respectively, which confirmed the formation of imidoselenium bond in the Poly[MWCNT-N=Se] nanocomposite. Morphological characterization was done by using scanning SEM, TEM indicated a good dispersion phase in the poly-nanocomposite matrix. The Poly[MWCNT-N=Se] nanocomposite showed good thermal stability. The DC electrical conductivity of poly-nanocomposite was found to be 5.34 ×10-4 S/cm in ambient temperature. This is attributed to the interaction among the nanotubes.
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[Poly[di(2,5‐dimercapto‐1,3,4‐thiadiazole)]‐Pt(IV)] complex [PDMT‐Pt(IV)] was prepared by the reaction 2,5‐dimercapto‐1,3,4‐thiadiazole with hydrogen hexachloroplatinate (IV) hydrate in a 2:1 molar ratio in mixture of methanol and water... more
[Poly[di(2,5‐dimercapto‐1,3,4‐thiadiazole)]‐Pt(IV)] complex [PDMT‐Pt(IV)] was prepared by the reaction 2,5‐dimercapto‐1,3,4‐thiadiazole with hydrogen hexachloroplatinate (IV) hydrate in a 2:1 molar ratio in mixture of methanol and water (1:8) under reflux for 24 h. The complex was characterized by elemental analyses, electronic spectra, FTIR spectroscopy, magnetic susceptibility, thermal analyses (TGA and DTA) and X‐Ray diffraction. The results obtained are consistent with the proposed structure. The DC electrical conductivity variation with a temperature in the range 300–500 K was studied after annealing for 24 h at 100ºC and after doping with 5% I2, for comparison. The complex behaved as a typical semiconductor with regard to an increase of conductivity with heat. The annealed and doped complex gave a DC electrical conductivity of 10 S cm and 5.6×10 S cm at high temperature, respectively. The DC electrical conductivity behavior was interpreted using the band theory.
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... Ali G. El‐Shekeil a * & Omar M. Al‐Shuja'a a pages 931-937. ... Quím. São Paulo , 31( 1 ): 4552. View all references. The activation energy E a was calculated from the slope of a plot of the Coats‐Redfern equation 1313.... more
... Ali G. El‐Shekeil a * & Omar M. Al‐Shuja'a a pages 931-937. ... Quím. São Paulo , 31( 1 ): 4552. View all references. The activation energy E a was calculated from the slope of a plot of the Coats‐Redfern equation 1313. Coats, AW and Redfern, JP 1964. Nature , 68: 201208. ...
Research Interests:
Materials Engineering, Materials Science, Physical Chemistry, FTIR spectroscopy, Conducting Polymers, and 11 moreDoping, Activation Energy, Magnetic Susceptibility, Palladium, Coordination Polymerization, Thermal Analysis, X ray diffraction, Thermal Stability, Electrical Conductivity, Electric Conductivity, and Polycomplexes
... Vulcanization accelerators such as 2-morpholinothiobenzothiazole, N-cyclohexyl-2-benzothiazole sulfenamide and 2,2-dithiobisbenzothiazole are derived from 2-mercaptobenzothiazole (MBT) (55. Niessen ... El-Shekeil, A., Al-Maydamah, H.,... more
... Vulcanization accelerators such as 2-morpholinothiobenzothiazole, N-cyclohexyl-2-benzothiazole sulfenamide and 2,2-dithiobisbenzothiazole are derived from 2-mercaptobenzothiazole (MBT) (55. Niessen ... El-Shekeil, A., Al-Maydamah, H., Al-Karbooly, A. and Khalid, M. 1999. ...
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Materials Engineering, Materials Science, Chemistry, Polymer Chemistry, FTIR spectroscopy, and 10 moreDoping, Copper, Photovoltaic Cell, Electronic Spectra, Activation Energy, Plymeric Materials, Electrical Conductivity, Conducting Polymer and Elastomer Composites, Electric Conductivity, and Copper Complex
... hence, they sometimes resemble metals and inorganic semiconductors (88. Samrana, K., Vazid, A., Zulfequar, M., Mazharul Haq, M. and Husain ... the main drawback is its out diffusion characteristics during high temperature thermal... more
... hence, they sometimes resemble metals and inorganic semiconductors (88. Samrana, K., Vazid, A., Zulfequar, M., Mazharul Haq, M. and Husain ... the main drawback is its out diffusion characteristics during high temperature thermal cycling and even at room temperature, giving ...
Research Interests:
Research Interests:
Engineering, Materials Engineering, Materials Science, Chemistry, Physical Chemistry, and 15 morePolymer Chemistry, FTIR spectroscopy, Conducting Polymers, Doping, Applied, Iodine, Annealing, Activation Energy, Coordination Polymerization, CHEMICAL SCIENCES, Thermal Analysis, Thermal Stability, Electrical Conductivity, Electric Conductivity, and Molecular Structure
... Ali El-Shekeil Corresponding Author Contact Information , E-mail The Corresponding Author , E-mail The Corresponding Author , Khalid Y. Abid and Omar M. Al-Shuja'a. Chemistry Department, Faculty of Science,... more
... Ali El-Shekeil Corresponding Author Contact Information , E-mail The Corresponding Author , E-mail The Corresponding Author , Khalid Y. Abid and Omar M. Al-Shuja'a. Chemistry Department, Faculty of Science, Sana'a University, PO Box 12463, Sana'a, Yemen. ...
Research Interests:
... Address correspondence to: Ali G. El-Shekeil, PO Box 12463, Sana'a, Yemen, E-mail: shekeil2000@yahoo.com of the DC electrical conductivity. ... The mixture was refluxed with stirring using a magnetic bar for 24 h under a thin... more
... Address correspondence to: Ali G. El-Shekeil, PO Box 12463, Sana'a, Yemen, E-mail: shekeil2000@yahoo.com of the DC electrical conductivity. ... The mixture was refluxed with stirring using a magnetic bar for 24 h under a thin stream of nitrogen gas. ...
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Materials Engineering, Materials Science, Chemistry, Physical Chemistry, FTIR spectroscopy, and 13 moreConducting Polymers, Doping, Metal Complexes, Electronic Spectra, Activation Energy, Zinc, Thermal Analysis, X ray diffraction, Thermal Stability, Electrical Conductivity, Macromolecular, Electric Conductivity, and Polycomplexes
Poly(vinyl pyrrolidone)/Poly(acrylonitrile)/multi-walled carbon nanotubes composites (PVP/PAN/MWNTs) were fabricated by a simple solution cast technique with a wide composition range from 0 to 3.12 wt% of MWNTs. The nanocomposites were... more
Poly(vinyl pyrrolidone)/Poly(acrylonitrile)/multi-walled carbon nanotubes composites (PVP/PAN/MWNTs) were fabricated by a simple solution cast technique with a wide composition range from 0 to 3.12 wt% of MWNTs. The nanocomposites were characterized by fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM). A percolated MWNTs network structure and relatively good dispersion of MWNTs are evident in PVP/PAN/MWNTs nanocomposites with 3.12 wt% of MWNTs. The thermal properties of the polymer blend with MWNTs were carried out by means of different scanning calorimetry (DSC). It indicated that the incorporation of MWNTs had a significant influence on crystallization and melting behaviors for the polymer nanocomposites. The four point probe method was used to measure the electrical conductivity, and the result showed ionic conductivity of the order of 2.87 × 10 S/cm to 1.91 × 10 S/cm. The effect of the concentration of the filler on the conductivity of the po...
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In this study, the effect of polymeric Methylene Diphenyl Diisocyanate (pMDI) chemical treatment on kenaf (Hibiscus cannabinus) reinforced thermoplastic polyurethane (TPU/KF) was examined using two different procedures. The first... more
In this study, the effect of polymeric Methylene Diphenyl Diisocyanate (pMDI) chemical treatment on kenaf
(Hibiscus cannabinus) reinforced thermoplastic polyurethane (TPU/KF) was examined using two different procedures. The first consisted of treating the fibers with 4% pMDI, and the second involved 2% NaOH + 4% pMDI. The composites were characterized according to their tensile properties, Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (SEM). The treatment of the composite with 4% pMDI did not significantly affect its tensile properties, but the treatment with 2% NaOH + 4% pMDI significantly increased the tensile properties of the composite (i.e., 30 and 42% increases in the tensile strength and modulus, respectively). FTIR also showed that treatment with 2% NaOH + 4% pMDI led to the strongest H-bonding. Additionally, the surface morphology of specimens after
(Hibiscus cannabinus) reinforced thermoplastic polyurethane (TPU/KF) was examined using two different procedures. The first consisted of treating the fibers with 4% pMDI, and the second involved 2% NaOH + 4% pMDI. The composites were characterized according to their tensile properties, Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (SEM). The treatment of the composite with 4% pMDI did not significantly affect its tensile properties, but the treatment with 2% NaOH + 4% pMDI significantly increased the tensile properties of the composite (i.e., 30 and 42% increases in the tensile strength and modulus, respectively). FTIR also showed that treatment with 2% NaOH + 4% pMDI led to the strongest H-bonding. Additionally, the surface morphology of specimens after
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In this study, a composite of thermoplastic polyurethane reinforced with short Kenaf fiber (Hibiscus cannabinus) was prepared via melt-blending method using Haake Polydrive R600 internal mixer. Effect of various sodium hydroxide NaOH... more
In this study, a composite of thermoplastic polyurethane reinforced with short Kenaf fiber (Hibiscus cannabinus) was prepared via melt-blending method using Haake Polydrive R600 internal mixer. Effect of various sodium hydroxide NaOH concentrations, namely 2, 4 and 6% on tensile, flexural and impact strength was studied. Mean values were determined for each composite according to ASTM standards. Tensile, flexural and impact strength negatively correlates with higher concentrations of NaOH. Scanning electron microscope (SEM) was used to examine the surface of both treated and untreated fibers as well as fracture surface of tensile specimens. Morphology of treated and untreated fibers showed a rougher surface of treated fibers. It also showed that some of high concentrations of NaOH treated fibers have NaOH residues on their surface. This was confirmed by energy dispersive X-ray point shooting performed on the same SEM machine. Morphology of surface of fracture indicated that untreated composite had a better adhesion. Treated and untreated fibers as well as composites were characterized using Fourier transform infrared spectroscopy (FTIR). FTIR of treated fibers showed that NaOH treatment resulted in removal of hemicelluloses and lignin. FTIR also showed that untreated composite has more H-bonding than all treated composites. Thermal characteristic studies using thermogravimetry analysis and differential scanning calo-rimetry showed that untreated composite was more thermally stable than treated composites.
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Polypyrrole-zirconium complex has been synthesized by reacting 2-amino-3,4- dicyano-5-mercaptopyrrole with zirconium nitrate in absolute ethanol under reflux for 24 h. The product has been characterized by elemental Analyses, FTIR... more
Polypyrrole-zirconium complex has been synthesized by reacting 2-amino-3,4- dicyano-5-mercaptopyrrole with zirconium nitrate in absolute ethanol under reflux for 24 h. The product has been characterized by elemental Analyses, FTIR spectroscopy, in addition to thermal analysis (TGA and DSC) and its solubility has been investigated.
The DC electrical conductivity variation of polypyrrole-zirconium complex has been
studied in the temperature range 300–500 K after annealing for 24 h at 1008C and doping with I2, FeCl3 and CuCl2 . H2O for comparison. An attempt has been made to interpret the DC electrical conductivity behavior and thermal properties to chain length, dopant used, polymer structure and attached groups.
The DC electrical conductivity variation of polypyrrole-zirconium complex has been
studied in the temperature range 300–500 K after annealing for 24 h at 1008C and doping with I2, FeCl3 and CuCl2 . H2O for comparison. An attempt has been made to interpret the DC electrical conductivity behavior and thermal properties to chain length, dopant used, polymer structure and attached groups.
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Oligo[aromatic diimidoselenium] (PADIS) is prepared from the reaction of the disubstituted aromatic compounds, namely, 1,4-phenylenediamine, 4,4OE-thio-dianiline, 1,1OE-biphenylene-4,4OE-diamine, and 2,2OE-dithiodianiline, with selenium... more
Oligo[aromatic diimidoselenium] (PADIS) is prepared from the reaction of the disubstituted aromatic compounds, namely, 1,4-phenylenediamine, 4,4OE-thio-dianiline, 1,1OE-biphenylene-4,4OE-diamine, and 2,2OE-dithiodianiline, with selenium dioxide in refluxing absolute ethanol. The four materials are investigated by elemental analysis, electronic spectra, Fourier Transform-infrared spectroscopy, and [ 1 H]NMR spectroscopy. The DC electrical conductivity variation with temperature in the range 300-500 K of the materials after annealing for 24 h at 100ºC and after doping with 10% I 2 is determined for comparison.
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DC electrical conductivity of oligo[aromatic diimidoselenide] is studied in the temperature range 300-500 K after doping. The dopants used are I 2 , FeCl 3 , ZnCl 2 , NaClO 4 and CuSO 4. Doping is done by mixing with 10% of the dopant,... more
DC electrical conductivity of oligo[aromatic diimidoselenide] is studied in the temperature range 300-500 K after doping. The dopants used are I 2 , FeCl 3 , ZnCl 2 , NaClO 4 and CuSO 4. Doping is done by mixing with 10% of the dopant, and by chemical doping. The DC electrical conductivity of the two types of doped materials is measured, compared and results interpreted. A trend of high DC electrical conductivity in the case of chemical doping especially with I 2 has been noticed. A conduction of 10 À7 S cm À1 is obtained at ambient or higher temperatures. This is related to a charge transfer complex formation between the oligomers and I 2. The complexation is confirmed from the electronic spectra of the chemically doped materials which showed a decrease in the p-p à energy absorption bands and an increase in the n-p à energy absorption bands.
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Poly[di(2,5-dimercapto-1,3,4-thiadiazole)]-Pt(IV)] complex [PDMT-Pt(IV)] was prepared by the reaction 2,5-dimercapto-1,3,4-thiadiazole with hydrogen hexachloroplatinate (IV) hydrate in a 2:1 molar ratio in mixture of methanol and water... more
Poly[di(2,5-dimercapto-1,3,4-thiadiazole)]-Pt(IV)] complex [PDMT-Pt(IV)] was prepared by the reaction 2,5-dimercapto-1,3,4-thiadiazole with hydrogen hexachloroplatinate (IV) hydrate in a 2:1 molar ratio in mixture of methanol and water (1:8) under reflux for 24 h. The complex was characterized by elemental analyses, electronic spectra, FTIR spectroscopy, magnetic susceptibility, thermal analyses (TGA and DTA) and X-Ray diffraction. The results obtained are consistent with the proposed structure. The DC electrical conductivity variation with a temperature in the range 300–500 K was studied after annealing for 24 h at 100ºC and after doping with 5% I2, for comparison. The complex behaved as a typical semiconductor with regard to an increase of conductivity with heat. The annealed and doped complex gave a DC electrical conductivity of 1029 S cm21 and 5.6 1029 S cm21 at high temperature, respectively. The DC electrical conductivity behavior was interpreted using the band theory.
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The reaction of 2,5-dimercapto-1,3,4-thiadiazole (DMT) (6.6 mmol) with zinc, cadmium and mercury chlorides (3.3 mmol) gave new polymer-metal complexes. The poly[di(2,5-dimercapto-1,3,4-thiadiazole)]-metal complexes of Zn(II), Cd(II) and... more
The reaction of 2,5-dimercapto-1,3,4-thiadiazole (DMT) (6.6 mmol) with zinc, cadmium and mercury chlorides (3.3 mmol) gave new polymer-metal complexes. The poly[di(2,5-dimercapto-1,3,4-thiadiazole)]-metal complexes of Zn(II), Cd(II) and Hg(II) were
characterized by elemental analyses, electronic spectra, FTIR spectroscopy, thermal analyses (TGA and DTA) andX-Ray diffraction. The DC electrical conductivity variation with temperature in the range 300-500 K of the polymer-metal complexes after annealing for 24 h at 100◦C and after doping with 5% I2 is determined for comparison. The activation energies were calculated and the results were interpreted using the band energy model.
characterized by elemental analyses, electronic spectra, FTIR spectroscopy, thermal analyses (TGA and DTA) andX-Ray diffraction. The DC electrical conductivity variation with temperature in the range 300-500 K of the polymer-metal complexes after annealing for 24 h at 100◦C and after doping with 5% I2 is determined for comparison. The activation energies were calculated and the results were interpreted using the band energy model.
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A new poly[di(2,5-dimercapto-1,3,4-thiadiazole)-Pd(II)] complex (PDMT-Pd) was synthesized by the reaction of 2,5-dimercapto-1,3,4-thiadiazole (2 mmol) with palladium (II) chloride (1 mmol) in absolute ethanol under reflux for 24 hours.... more
A new poly[di(2,5-dimercapto-1,3,4-thiadiazole)-Pd(II)] complex (PDMT-Pd) was synthesized by the reaction of 2,5-dimercapto-1,3,4-thiadiazole (2 mmol) with palladium (II) chloride (1 mmol) in absolute ethanol under reflux for 24 hours. The products were characterized by elemental analyses, electronic spectra, FTIR spectroscopy, magnetic susceptibility, thermal analyses (TGA and DTA) and X-Ray diffraction. The DC electrical conductivity variation with temperature of the polymer-Pd (II) complex in the range 300–500 K was studied after annealing for 24 h at 1008C and after doping with 5% I2, for comparison.
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Polymercaptobenzothiazole disulfide-copper complex PMBTS-Cu has been synthesized by reacting 2-mercaptobenzothiazole disul-fide with CuCl 2 in absolute ethanol and dimethyl sulfoxide (DMSO) under reflux for 24 h. PMBTS-Cu has been... more
Polymercaptobenzothiazole disulfide-copper complex PMBTS-Cu has been synthesized by reacting 2-mercaptobenzothiazole disul-fide with CuCl 2 in absolute ethanol and dimethyl sulfoxide (DMSO) under reflux for 24 h. PMBTS-Cu has been characterized by several techniques using electronic spectra, elemental analyses, FTIR spectroscopy, and its solubility has been investigated. DC electrical conductivity variation with temperature, in the range 300-500 K, after annealing for 24 h at 100 • C, and doping with different ratios of I 2 , is determined for comparison. Doping was done in two ways: by mixing and chemically. Activation energies were calculated and the results were interpreted using the band energy model. DC electrical conductivity of I 2 doped PMBTS-Cu complex increased with increasing temperature due to the variation of the carrier concentration with temperature as in the case of semiconductors. PMBTS-Cu complex has a copper ion in its backbone and copper salt is known to be a good dopant. Thus, these materials are doped internally, so the doped polymer-Cu complex are only one or two orders of magnitude higher in DC electrical conductivity than the annealed state. However, the energy gap is very small, which suggests suitability in applications like photovoltaic cells. 10 15 20
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Reaction of phenylmalonic acid dihydrazide with 2,4-pentanedione proceeded through a novel rearrangement to give 5,7-dimethyl-1-oxo-2-phenyl-1H-pyrazolo[1,2-α]pyrazol-4-ium-3-olate (DPO). This peculiar structure had a positive charge... more
Reaction of phenylmalonic acid dihydrazide with 2,4-pentanedione proceeded through a novel rearrangement to give 5,7-dimethyl-1-oxo-2-phenyl-1H-pyrazolo[1,2-α]pyrazol-4-ium-3-olate (DPO). This peculiar structure had a positive charge (cation) localized on the pyrazolium ring and a negative charge localized on the other ring. The intermolecular charge-transfer complexes (CTC) formed between DPO as donor and iodine as an acceptor have been studied spectrophotometrically. Doping was done in two ways: by mixing and chemically using different ratios of I 2. The suggested structures of the solid iodine charge-transfer complexes were investigated by several techniques using electronic spectra, FTIR spectroscopy and thermal analysis (TGA and DTA). DC electrical conductivity variation with temperature in the range 300-500 K after annealing for 24 h at 100 • C and after doping with different ratios of I 2 through the two ways of doping is determined for comparison. The activation energies were calculated and the results were interpreted using the band energy model. DC electrical conductivity of the iodine CTC increased with increasing temperature. The iodine CTC are only one or two orders of magnitude higher in DC electrical conductivity than the undoped material, however the energy gap is very small in addition to its thermal stability which suggests the use of these materials in applications like photovoltaic cells. 10 15
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Poly[di(2,5-dimercapto-1,3,4-thiadiazole)]-metal complexes of Co(II), Ni(II), Cu(II), and Zn(II) were synthesized by the reaction of 2,5-dimercapto-1,3,4-thiadiazole (6.6 mmol) with anhydrous cobalt, nickel, copper, and zinc chlorides... more
Poly[di(2,5-dimercapto-1,3,4-thiadiazole)]-metal complexes of Co(II), Ni(II), Cu(II), and Zn(II) were synthesized by the reaction of 2,5-dimercapto-1,3,4-thiadiazole (6.6 mmol) with anhydrous cobalt, nickel, copper, and zinc chlorides (3.3 mmol) in absolute ethanol under reflux for 24 h. The products were characterized by elemental analyses, electronic spectra, FTIR spectroscopy, as well as thermal analyses (TGA and DTA), and X-ray diffraction. The DC electrical conductivity variation of the poly[di(2,5-dimercapto-1,3,4-thiadiazole)-metal] complexes were studied in the temperature range 300-500 K as annealed for 24 h at 1008C and after doping with 5% I 2 for comparison. An attempt is made to interpret the DC electrical conductivity behavior and thermal properties to doping, annealing, structure, and metal used.
Research Interests:
Polymercaptobenzothiazole disulfide-copper complex PMBTS-Cu has been synthesized by reacting 2-mercaptobenzothiazole disulfide with CuCl2 in absolute ethanol and dimethyl sulfoxide (DMSO) under reflux for 24 h. PMBTS-Cu has been... more
Polymercaptobenzothiazole disulfide-copper complex PMBTS-Cu has been synthesized by reacting 2-mercaptobenzothiazole disulfide
with CuCl2 in absolute ethanol and dimethyl sulfoxide (DMSO) under reflux for 24 h. PMBTS-Cu has been characterized
by several techniques using electronic spectra, elemental analyses, FTIR spectroscopy, and its solubility has been investigated. DC
electrical conductivity variation with temperature, in the range 300–500 K, after annealing for 24 h at 100◦C, and doping with
different ratios of I2, is determined for comparison. Doping was done in two ways: by mixing and chemically. Activation energies
were calculated and the results were interpreted using the band energy model. DC electrical conductivity of I2doped PMBTS-Cu
complex increased with increasing temperature due to the variation of the carrier concentration with temperature as in the case of
semiconductors. PMBTS-Cu complex has a copper ion in its backbone and copper salt is known to be a good dopant. Thus, these
materials are doped internally, so the doped polymer-Cu complex are only one or two orders of magnitude higher in DC electrical
conductivity than the annealed state. However, the energy gap is very small, which suggests suitability in applications like photovoltaic
cells.
with CuCl2 in absolute ethanol and dimethyl sulfoxide (DMSO) under reflux for 24 h. PMBTS-Cu has been characterized
by several techniques using electronic spectra, elemental analyses, FTIR spectroscopy, and its solubility has been investigated. DC
electrical conductivity variation with temperature, in the range 300–500 K, after annealing for 24 h at 100◦C, and doping with
different ratios of I2, is determined for comparison. Doping was done in two ways: by mixing and chemically. Activation energies
were calculated and the results were interpreted using the band energy model. DC electrical conductivity of I2doped PMBTS-Cu
complex increased with increasing temperature due to the variation of the carrier concentration with temperature as in the case of
semiconductors. PMBTS-Cu complex has a copper ion in its backbone and copper salt is known to be a good dopant. Thus, these
materials are doped internally, so the doped polymer-Cu complex are only one or two orders of magnitude higher in DC electrical
conductivity than the annealed state. However, the energy gap is very small, which suggests suitability in applications like photovoltaic
cells.
Research Interests:
The chemical functionalization of amino multiwalled carbon nanotubes (MWCNT-NH2) by selenium dioxide (SeO2) was used to produce Poly [MWCNT/Imidoselenium] nanocomposite. The obtained poly-composite was characterized by FT-IR, UV-Vis,... more
The chemical functionalization of amino multiwalled carbon nanotubes (MWCNT-NH2) by selenium dioxide (SeO2) was used to produce Poly [MWCNT/Imidoselenium] nanocomposite. The obtained poly-composite was characterized by FT-IR, UV-Vis, XRD, TEM, SEM, TGA, DSC and DC electrical conductivity. The characteristic peaks in FT-IR and UV-Visible spectra were found shifted to higher wave numbers, and the n-π* bands were shifted to lower wavelengths (red shift), respectively, which confirmed the formation of imidoselenium bond in the Poly[MWCNT-N=Se] nanocomposite. Morphological characterization was done by using scanning SEM, TEM indicated a good dispersion phase in the poly-nanocomposite matrix. The Poly[MWCNT-N=Se] nanocomposite showed good thermal stability. The DC electrical conductivity of poly-nanocomposite was found to be 5.34 ×10-4 S/cm in ambient temperature. This is attributed to the interaction among the nanotubes.