1 3C NMR spectrum analysis of electrochemically prepared polythienylene films

Abstract

The ¹³C NMR spectrum analysis of electrochemically prepared polythienylene films has been investigated. Both a film doped with ClO⁻₄ ions (PT–ClO₄) and an undoped film (PT₀) through the electrochemical reduction of PT–ClO₄ give only two sharp absorption bands. The spectra of PT–ClO₄ and PT₀ are remarkably similar to each other in shape. These results demonstrate that both polythienylene are well‐defined polymers with only two kinds of carbon atoms which are compatible with dominance of the α–α′ linkage. The upfield shift of the absorption band for PT₀ compared with PT–ClO₄ is consistent with the increase in electron density through the electrochemical reduction.