Synthesis and polymerization of 2-and 3-substituted thiophene derivatives linked by polyether bridges

Date

2004-11-15

Author

Tirkeş, Süha
Cihaner, A
Önal, Ahmet Muhtar

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New compounds consisting of 2- and 3-thienyl units linked by polyether bridges have been synthesized and their electrochemical polymerization was performed via constant potential electrolysis (CPE) in an electrolytic solution containing 0.1 M tetrabutylammonium hexafluorophosphate (TBAPF(6)) dissolved in CH3CN. 2-Thienyl monomers (I and II), but not 3-thienyl monomers (III and IV), were also polymerized via chemical oxidation, which yielded broken pi-conjugated polymer products. The polymers were characterized using H-1 NMR and FT-IR spectroscopic techniques. It was found that both chemical and electrochemical oxidation of 2-thienyl monomers gave mainly poly(2,2'-bithiophenemethylene) due to elimination of polyether chains during the polymerization reaction. On the other hand, electrochemical oxidation of 3-thienyl monomers resulted in corresponding polymers without any cleavage of polyether bridges. Spectroelectrochemical (SPEL) properties of the products were investigated using UV-Vis spectroscopic techniques.

Subject Keywords

Analytical Chemistry, Electrochemistry, General Chemical Engineering

URI

https://hdl.handle.net/11511/37346

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Welding Technology and Nondestructive Testing Research and Application Center (KTTMM), Article