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


Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Fen Bilimleri Enstitüsü, Fen Bilimleri Enstitüsü, Türkiye

Tezin Onay Tarihi: 2013

Öğrenci: Nazlı Buket Zaifoğlu

Eş Danışman: ALİ ÇIRPAN, LEVENT KAMİL TOPPARE

Özet:

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.