Syntheses of new monomeric and polymeric units and electrochemical behaviors for the use in electrochromic applications

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2013

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Zaifoğlu, Nazlı Buket

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4'-(Tert-butyl)-4,7-di(thiophen-2-yl)spiro[benzo[d]imidazole-2,1'-cyclohexane], 4,7-di([2,2'-bithiophen]-5-yl)-4'-(tert-butyl)spiro[benzo[d]imidazole-2,1'-cyclohexane], 4'-(tert-butyl)-4,7-bis(thieno[3,2-b]thiophen-2-yl)spiro[benzo[d]imidazole-2,1'- cyclohexane] were synthesized, electrochemically polymerized and electrochromic properties of resultant polymers were investigated. The monomers were characterized by nuclear magnetic resonance spectroscopy (1H-NMR, 13C-NMR). Cyclic voltammetry (CV) and ultraviolet–visible spectroscopy techniques were used to investigate electrochemical behavior of the monomers and redox behaviors of the conducting polymers. After electrochemical polymerization, the electrochromic properties of the conducting polymers were investigated via spectroelectrochemical, and kinetic studies. Poly-(2-(4-(hexadecyloxy)phenyl)-5-methyl-10-(5-methylthiophen-2-yl)-1- phenyl-1H-phenanthro[9,10-d]imidazole), poly-(2-(4-(hexadecyloxy)phenyl)-5-methyl- 10-(5'-methyl-[2,2'-bithiophen]-5-yl)-1-phenyl-1H-phenanthro[9,10-d]imidazole) were synthesized and their electrochromic properties were investigated. For the characterization of the polymers gel permeation chromatography (GPC), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA) were used. Cyclic voltammetry (CV) and ultraviolet–visible spectroscopy were used to investigate electrochemical behavior and redox reactions of conducting polymers.

Subject Keywords

Conducting polymers., Benzimidazoles., Phenanthrene., Organic conductors., Electrochromic devices.

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http://etd.lib.metu.edu.tr/upload/12616084/index.pdf
https://hdl.handle.net/11511/22768

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

N. B. Zaifoğlu, “Syntheses of new monomeric and polymeric units and electrochemical behaviors for the use in electrochromic applications,” M.S. - Master of Science, Middle East Technical University, 2013.