Thiophene ended epsilon-caprolactone conducting copolymers and their electrochromic properties

2005-04-01
Kerman, I
Toppare, Levent Kamil
Yilmaz, F
Yagci, Y
epsilon-Caprolactone was polymerized by ring-opening polymerization (ROP), using thiophene methanol as the initiator and stannous octoate as the catalyst to yield poly(epsilon-caprolactone) with a thiophene end group. Homopolymerization of thiophene functionalized poly (epsilon-caprolactone) (PCL) was achieved by a constant current electrolysis method. Copolymerizations of PCL with thiophene and pyrrole were achieved in acetonitrile (ACN)-tetrabutylammonium tetrafluoroborate (TBAFB) solvent-electrolyte couple via constant potential electrolysis. Characterization of the samples were performed by nuclear magnetic resonance spectroscopy (NMR), cyclic voltammetry (CV), fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy, (SEM). Electrical conductivities were measured by the four-probe technique. Spectroelectrochemical behavior of PCL/PTh film, which was deposited on ITO-glass, was investigated by UV-Vis Spectrophotometer. Furthermore, it is found to be an anodically coloring copolymer that electrochemically sit-itches between gray-blue oxidized state and pole red reduced state, exhibiting electrochromic behavior.
JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY

Suggestions

Synthesis, characterization, and electrochromic properties of conducting copolymers of 2-[(3-thienylcarbonyl)oxy]ethyl 3-thiophene carboxylate with thiophene and pyrrole
Bulut, U; Alkan, S; Yilmaz, F; Yagci, Y; Toppare, Levent Kamil (Informa UK Limited, 2004-07-01)
2-[(3-Thienylcarbonyl)oxy]ethyl 3-thiophene carboxylate (TOET) was synthesized via the reaction of 3-thionylcarboxylic acid with ethylene glycol, and electrochemically polymerized with thiophene (Th) and pyrrole (Py) by using tetrabutylannnonium tetrafluoroborate (TBAFB) as the supporting electrolyte in acetonitrile (ACN). Characterization of the resulting copolymers were performed via cyclic voltammetry, FTIR, and scanning electron microscopy (SEM). Electrical conductivities are measured by the four-probe ...
Immobilization of Invertase in a Novel Proton Conducting Poly(vinylphosphonic acid) - poly(1-vinylimidazole) Network
Isikli, Suheda; Tuncagil, Sevinc; Bozkurt, Ayhan; Toppare, Levent Kamil (Informa UK Limited, 2010-01-01)
A novel proton conducting polymer blend was prepared by mixing poly(vinylphosphonic acid) (PVPA) with poly(1-vinylimidazole) (PVI) at various stoichiometric ratios via changing molar ratio of monomer repeating unit to achieve the highest protonation. The polymer network having the most suitable stoichiometric ratio for substantial proton conductivity was prepared and characterized by FT-IR spectroscopy and proton conductivity measurements. The network was used for immobilization of invertase and some import...
Soluble Alkyl Substituted Poly(3,4-Propylenedioxyselenophene)s: A New Platform For Optoelectronic Materials
Atak, Samed; Icli-Ozkut, Merve; Önal, Ahmet Muhtar; CİHANER, ATİLLA (Wiley, 2011-10-15)
Optical and electrochemical properties of regiosymmetric and soluble alkylenedioxyselenophene-based electrochromic polymers, namely poly(3,3-dibutyl-3,4-dihydro-2H-seleno pheno [3,4-b][1,4]dioxephine) (PProDOS-C(4)), poly(3,3-dihexyl-3,4-dihydro-2H-selenopheno[3,4-b][1,4]dioxephine) (PProDOS-C(6)), and poly(3,3-didecyl-3,4-dihydro-2H-selenopheno[3,4-b][1,4]dioxephine) (PProDOS-C(10)), are highlighted. It is noted that these unique polymers have low bandgaps (1.57-1.65 eV), and they are exceptionally stable ...
Degradation of Poly(2-hydroxyethyl methacrylate) Obtained by Radiation in Aqueous Solution
Varguen, Elif; Usanmaz, Ali (Informa UK Limited, 2010-01-01)
The degradation of poly(hydroxyethyl methacrylate), PHEMA obtained by -radiation induced polymerization of HEMA in aqueous solution, was studied. The polymer was a gel type and insoluble in common organic solvents. The DSC thermogram of the polymer gave a Tg value at 88.2 degrees C and an endothermic peak showed further polymerization or crosslinking at 110-160 degrees C. The degradation observed in TGA was a depolymerization type. However, the FT-IR of TGA fragments showed no monomer, which was degraded fu...
Electrochromic properties of copolymer of terephthalic acid bis-(thiophen-3-yl-methyl) thioester with pyrrole
Tuerkarslan, Oezlem; Toppare, Levent Kamil (Informa UK Limited, 2007-01-01)
Terephthalic acid bis-(thiophen-3-yl-methyl) thioester ( TTMT) was synthesized via the reaction of thiophen-3-yl methanethiol with terephthaloyl dichloride. This 3-functionalized thiophene monomer was polymerized in the presence of pyrrole (Py) upon constant potential application. Spectroelectrochemistry experiments reflected a pi to pi* transition with a band gap energy of 2.4 eV for the copolymer. A dual type electrochromic device (ECD) of P(TTMT-co-Py) and poly(3,4-ethylenedioxythiophene) (PEDOT) was con...
Citation Formats
I. Kerman, L. K. Toppare, F. Yilmaz, and Y. Yagci, “Thiophene ended epsilon-caprolactone conducting copolymers and their electrochromic properties,” JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY, pp. 509–520, 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40710.