Thesis Type: Postgraduate
Institution Of The Thesis: Gazi University, Fen Bilimleri Enstitüsü, -, Turkey
Approval Date: 2019
Thesis Language: Turkish
Student: MELEK AKTAŞ GEMİCİ
Supervisor: YASEMİN UDUM
Open Archive Collection: AVESIS Open Access Collection
Abstract:Conductive polymers with conjugated structures are of great interest due to their wide range of applications. The synthesized conjugated polymers are used in many industrial applications such as OLEDs, photovoltaic cells, biosensors, metal sensors and electrochromic devices. In the first part of this thesis, monomer, 5-fluoro-4,7-bis (4- hexylthiophen-2 yl) benzo [c] [1,2,5] thiadiazole (DTFBT), containing donor and acceptor functional groups in the same structure was electrochemically polymerized. Electrochemical and spectroelectrochemical properties of the synthesized electrochromic polymer have been investigated. It was determined that the conductive polymer has low band gap and low response time and showed multichromic properties. In the second part of the thesis, a new, amperometric biosensor is developed which is cheap, portable and easy to use based on conductive polymer for the detection of toxic phenolic compounds. The conductive polymer, poly (5-fluoro-4,7-bis (4-hexylthiophen-2 yl) benzo [c] [1,2,5] thiadiazole (poly (DTFBT)), was deposited onto the graphite electrode by cyclic voltammetry technique. The laccase was immobilized on a modified graphite electrode. Optimum pH, film thickness and enzyme amount of the electrodes were optimized and kinetic parameters of conjugated polymer based biosensor were investigated. The amperometric biosensor showed good sensitivity and low limit of detection (LOD)