Two new monomers / 2-benzyl-5,12-dihydro-2Hpyrrolo[
3&rsquo / ,4&rsquo / :2,3][1,4]dioxocino[6,7-b]quinoxaline (DPOQ) and 5,12-
dihydrothieno[3&rsquo / ,4&rsquo / :2,3][1,4]dithiocino[6,7-b]quinoxaline (DTTQ), were synthesized.
The chemical structures of the monomers were characterized by Nuclear Magnetic
Resonance (1H-NMR), Fourier Transform Infrared (FTIR) and Mass Spectrometry
(MS). Copolymer of DPOQ with bithiophene (BT) was synthesized via potentiostatic
electrochemical polymerization in acetonitrile (ACN)-tetrabutylammonium
tetrafluoroborate (TBAFB) solvent-electrolyte couple. For DTTQ, copolymerization
with bithiophene was achieved via potentiodynamic method in dichloromethane
(DCM)-tetrabutylammonium hexafluorophosphate (TBAFP) solvent-electrolyte
couple. Characterizations of the resulting copolymers were performed by cyclic
voltammetry (CV), FTIR, Scanning Electron Microscopy (SEM) and UV-Vis
Spectroscopy. Four-probe technique was used to measure the conductivities of the
samples. Moreover, the spectroelectrochemical and electrochromic properties of the
copolymer films were investigated. In addition, dual type polymer electrochromic
devices (ECDs) based on P(DPOQ-co-BT) and P(DTTQ-co-BT) with poly(3,4-
ethylenedioxythiophene) (PEDOT) were constructed. Spectroelectrochemistry,
electrochromic switching and open circuit stability of the devices were studied. They
were found to have good switching times, reasonable contrasts and optical memories.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12606169/index.pdf |
| Date | 01 June 2005 |
| Creators | Beyazyildirim, Seniz |
| Contributors | Toppare, Levent |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
Page generated in 0.0019 seconds