Both anodically and cathodically coloring electrochromic polymer based on dithieno[3,4-b,3 ',4 '-e]-[1,4]-dithiine

Sahin, E
Camurlu, P
Toppare, Levent Kamil
In this study poly(dithieno[3,4-b,3',4'-e]-[1,4]-dithiine) (PDTH) was synthesized potentiodynamically in both p- and n-doping domains in 0.1 M tetrabutylammonium tetrafluoroborate/acetonitrie/borontrifluoride ethylether (8:2, v/v). Resulting homopolymer was characterized via cyclic voltammetry, FTIR and UV-vis Spectroscopy. PDTH revealed both anodically and cathodically coloring electrochromic behavior, upon p-and n-doping, respectively. Spectroelectrochemistry analysis of p-doped polymer, reflected electronic transitions at 450-486, 766 and similar to 900nm, revealing pi-pi degrees transition, polaron and bipolaron band formation, respectively. As an anodically coloring material, polymer revealed multi-color electrochromism, exhibiting brick, green and light gray colors. As the cathodically coloring material, color varied between highly transmissive and brown, as such this material exhibits potential controllable states. Switching ability of the polymer was also investigated by a kinetic study upon measuring the %T at the maximum contrast point. Results showed that PDTH is a potential material for electrochromic devices both as anodically and cathodically coloring material. (c) 2005 Elsevier B.V All rights reserved.


VOIGT, M; ROHDE, N; HALLENSLEBEN, ML; Toppare, Levent Kamil (Elsevier BV, 1993-03-22)
Several poly(3-acylpyrrole)s have been studied by cyclic voltammetry. The influence of some common impurities like water and cyanide present in the solvent-electrolyte system on the redox behavior of the polymer films were emphasized. Due to the presence of such impurities we have also observed changes in the macroscopic properties of the films such as their electrical conductivities. There is enough evidence that the amount of such impurities can be correlated to the degree of the so called overoxidation p...
Both p- and n-type dopable polymer toward electrochromic applications
Udum, Yasemin Arslan; Durmus, Asuman; Günbaş, Emrullah Görkem; Toppare, Levent Kamil (Elsevier BV, 2008-08-01)
Synthesis and electrochemical polymerization of 8,11 -bis(4-hexylthiophen-2-yl)acenaphtho[1,2-b]quinoxaline (HTAQ) were performed. The polymer was characterized by cyclic voltammetry, UV-Vis-NIR spectroscopy and colorimetry. Cyclic voltammetry studies revealed that the polymer was susceptible to both p- and n-doping. The electroactive polymer has fast switching time and high optical contrast, Spectroelectrochemistry also showed that the polymer is capable of being switched from bluish-green and a highly tra...
SELAMPINAR, F; Akbulut, Ural; YALCIN, T; SUZER, S; Toppare, Levent Kamil (Elsevier BV, 1994-02-01)
A conducting composite of polypyrrole was prepared via electrochemical methods. A polyamide was used as the insulating matrix polymer. The characterization of the composite was done by FT-IR, SEM, TGA, DSC and pyrolysis studies. Conductivity and solubility studies together with spectroscopic methods reveal that H bonding exists between the two polymers and a possible grafting to a certain extent.
Synthesis and characterization of graft copolymers of poly(2-(N-pyrrolyl)ethylvinylether) and polypyrrole
Kalaycioglu, E; Toppare, Levent Kamil; Yagci, Y (Elsevier BV, 2000-01-03)
Poly(2-(N-pyrrolyl)ethylvinylether) (poly(2-NEVE)) was synthesized from poly(2-chloroethylvinylether) (poly(2-CEVE)) via phase catalysis reaction. Graft copolymers of PPy/poly(2-NEVE) were synthesized by electrochemical methods. The chemical structure of poly(2-NEVE) was investigated by several spectroscopic and thermal methods. Graft copolymers were characterized by means of FTIR, Differential Scanning Calorimetry (DSC), Thermal Gravimetry Analysis (TGA), Scanning Electron Microscope (SEM). Conductivities ...
Synthesis and characterization of conducting copolymers of succinic acid bis-(4-pyrrol-1-yl-phenyl) ester and their electrochromic properties
Ertas, M; Çırpan, Ali; Toppare, Levent Kamil (Elsevier BV, 2004-05-07)
A new dipyrrolyl monomer was synthesized via the reaction between 4-pyrrol-1-yl phenol and butanedioyl dichloride. Electrochemical behavior of this monomer, succinic acid bis-(4-pyrrol-1-yl-phenyl) ester (SM) was studied. Homopolymerization was achieved by chemical and constant Current electrolysis methods. Copolymerization of SM with thiophene was performed by constant potential electrolysis in acetonitrile (AN)-tetrabutylammonium tetrafluoroborate (TBAFB) and dichloromethane (DCM)-TBAFB, solvent-electroly...
Citation Formats
E. Sahin, P. Camurlu, and L. K. Toppare, “Both anodically and cathodically coloring electrochromic polymer based on dithieno[3,4-b,3 ‘,4 ’-e]-[1,4]-dithiine,” SYNTHETIC METALS, pp. 124–128, 2006, Accessed: 00, 2020. [Online]. Available: