A convenient and higher yielding synthetic route to N-alkyl-bis (thiophene)-and N-alkyl-bis ( ethylenedioxythiophene) carbazole derivatives is reported and their aggregation, and electrochemical properties are characterized. The key step in the synthesis of this group of compounds has been the Stille-type coupling reaction between the N- alkyldibromocarbazole and tin derivatives of thiophene or ethylenedioxythiophene, as the ...