Regioregular properties substituted poly thiophenes

The microstructure and architecture of polymers can also gready influence die properties of die polymers. For example, poly(3-substituted thiophene)s could have three microstructure joints s-trans (head to tail), s-trans (head to head), and s-cis (head to tail) (Fig. 9.3). The regioregular head-to-tail poly(3-substituted thiophene)s exhibit higher electrical conductivity values and higher... 

The preparation of regioregular poly(3-alkylthio)thiophene has also been accomplish by this method (equation 83). The introduction of an alkylthio substitutent which is directly bonded to the 3-position of the polythiophene provides a way to tune the electrical and physical properties of the polymer (227). 

---