Akademik Veri Yönetim Sistemi
Tezin Türü: Doktora
Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Fen Edebiyat Fakültesi, Kimya Bölümü, Türkiye
Tezin Onay Tarihi: 2004
Tezin Dili: İngilizce
Öğrenci: Ali Çırpan
Danışman: LEVENT KAMİL TOPPARE
Özet:Synthesis and characterization of conducting copolymers were achieved by using thiophene-3-yl acetic acid cholesteryl ester (CM) and poly (3-methylthienyl methacrylate) (PMTM). A new polythiophene containing a cholesteryl side chain in the b- position was chemically polymerized in nitromethane/carbon tetrachloride using FeCl3 as the oxidizing agent. Polymerization was also achieved by constant current electrolysis in dichloromethane. Subsequently, conducting copolymers of thiophene-3-yl acetic acid cholesteryl ester (CM), PCM1 (obtained from chemical polymerization method), PCM4 (obtained from constant current electrolysis) with pyrrole were synthesized. Thiophene functionalized methacrylate monomer (MTM) was synthesized via esterification of the 3-thiophene methanol with methacryloyl chloride. The methacrylate monomer was polymerized by free radical polymerization in the presence of azobis (isobutyronitrile) (AIBN) as the initiator. Graft copolymers of poly (3-methylthienyl methacrylate)/polypyrrole, (PMTM2/PPy) and poly (3-methylthienyl methacrylate)/polythiophene, (PMTM2/PTh) were synthesized by constant potential electrolyses. PMTM2 coated Pt electrodes were utilized as the anode in the polymerization of pyrrole and thiophene. Moreover, oxidative polymerization of PMTM1 was studied by galvanostatic and chemical techniques. Characterizations of the samples were performed by CV, FTIR, NMR, DSC, TGA and SEM analyses. Electrical conductivities were measured by the four-probe technique. Immobilization of invertase in conducting copolymer matrices, poly (3-methylthienyl methacrylate) with pyrrole and thiophene was achieved by constant potential electrolysis using the sodium dodecyl sulfate as the supporting electrolyte. Polythiophene was also used for immobilization matrices. Cholesterol oxidase has been immobilized in conducting copolymer of thiophene-3-yl acetic acid