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

2004-11-15
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.

Citation Formats
S. Tirkeş, A. Cihaner, and A. M. Önal, “Synthesis and polymerization of 2-and 3-substituted thiophene derivatives linked by polyether bridges,” JOURNAL OF ELECTROANALYTICAL CHEMISTRY, vol. 573, no. 1, pp. 189–196, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37346.