N-vinil Karbazol Stiren Ve Akrilonitril Kopolimerizasyonu Ve Elektrokimyasal İncelenmesi
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Fen Bilimleri Enstitüsü
Institute of Science and Technology
Institute of Science and Technology
Özet
Uzun yıllardır P(N-Vinil Karbazol) (PNVCz) ilginç elektriksel ve fotoelektriksel özelliklerinden dolayı İlgi çekmektedir fotoaktif cihazlar, biosensor ve elektrokromik aletlerde kullanılması önerilmiştir. N-vinil karbazolün akrilamid varlığında elektrokimyasal polimerizasyonu Platin ve indium tin oksit (ITO) üzerinde asetonitril çözeltisinde tetraetil ammounyum perklorat destek (TEAP) elektroliti kullanılarak sağlanmıştır. Sonuçlar polikarbazol (PCz) ile karşılaştırıldığında kopolimerin dopamine karşı daha kararlı ve tersinir özellik göstermesinin yanı sıra mekanik ve termal özelliklerde iyileşme sagladığını göstermiştir. Bu çalışmada Poli (N-vinil Karbazol-stiren) P(NVCz-St) ve Poli (N-vinil Karbazol-akrilonitril) kopolimerleri CAN kullanılarak ( kontrollü oranda) polimerleşmenin vinil tarafından gerçekleşmesi sağlanmıştır. Bu işlem sonuncunda oluşan beyaz polimerler kimyasal yükseltgenme için N,N-DimetilFormamid (DMF) ve elektrokimyasal oksidasyon için dikloromethanda çözülmüş ve aromatik halkanın oksidasyonu sonucunda platin ve carbon fiber elektrotta film oluşması sagalanmıştır. Daha sonra bu polimer modifiye elekrotlar dopamine karşı elektrokimyasal özellikleri incelenmiştir.
A great deal of attention has been given to Poly(N-VinylCarbazole) PNVCz over years because of it’s unusual electrical and photoelectrical properties. It has been suggested for a number of applications, photo active devices, sensors and electrochoromic devices. Polymerization of N-vinly carbazole (NVCz) in the presence of Acrylamide (AAm) has been studied by electrochemical polymerization onto Pt and indium tin oxide (ITO) from acetonitrile solution of monomers and using tetraethtyl ammonium perchlorate (TEAP) as supporting electrolyte . Results suggest that mechanical and thermal properties can be improved as well as the response of copolymer electrodes to dopamine with better reversibility and stability as compared to polycarbazol (PCz) electrodes. However, the content of carbazole in the copolymer stucture is not easy to govern by electrosythesis. In the present study Poly (N-vinly Carbazol-styrene) P[NVCz-co-St] and Poly (N-vinly Carbazol-acrylonitrile) P[NVCz-co-AN] copolymers were prepared by using CAN as an oxidizing agent (in a controlled amount) polymerization were controlled in a way to obtain a copolymer through the vinyl groups . As a result of this process white colored polymers are formed and they dissolved in N,N-Dimethlyformamid (DMF) for chemical oxidation and in Dichloromethane for electrochemical oxidation which yields dark green polymers as a result of oxidation of the aromatic rings of the NVCz and electrochemical film formation of mentioned copolymers on Platinum and carbon fiber electrode was obtained which were characterized. These polymer modified electrodes were tested for dopamine behaviour
A great deal of attention has been given to Poly(N-VinylCarbazole) PNVCz over years because of it’s unusual electrical and photoelectrical properties. It has been suggested for a number of applications, photo active devices, sensors and electrochoromic devices. Polymerization of N-vinly carbazole (NVCz) in the presence of Acrylamide (AAm) has been studied by electrochemical polymerization onto Pt and indium tin oxide (ITO) from acetonitrile solution of monomers and using tetraethtyl ammonium perchlorate (TEAP) as supporting electrolyte . Results suggest that mechanical and thermal properties can be improved as well as the response of copolymer electrodes to dopamine with better reversibility and stability as compared to polycarbazol (PCz) electrodes. However, the content of carbazole in the copolymer stucture is not easy to govern by electrosythesis. In the present study Poly (N-vinly Carbazol-styrene) P[NVCz-co-St] and Poly (N-vinly Carbazol-acrylonitrile) P[NVCz-co-AN] copolymers were prepared by using CAN as an oxidizing agent (in a controlled amount) polymerization were controlled in a way to obtain a copolymer through the vinyl groups . As a result of this process white colored polymers are formed and they dissolved in N,N-Dimethlyformamid (DMF) for chemical oxidation and in Dichloromethane for electrochemical oxidation which yields dark green polymers as a result of oxidation of the aromatic rings of the NVCz and electrochemical film formation of mentioned copolymers on Platinum and carbon fiber electrode was obtained which were characterized. These polymer modified electrodes were tested for dopamine behaviour
Açıklama
Tez (Yüksek Lisans) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 2002
Thesis (M.Sc.) -- İstanbul Technical University, Institute of Science and Technology, 2002
Thesis (M.Sc.) -- İstanbul Technical University, Institute of Science and Technology, 2002
Konusu
İletkenlik Polimerler, elektropolimerizayon, N-VinilKarbazol, Conducting Polymer, Electropolymerization, N-VinylCarbazole
