Experimental and Computational Studies of Substituted Terthiophene Oligomers as Electroluminescent Materials

Structural and Electronic Properties of Poly[N-(2-cyanoalkyl)pyrrole]s Bearing Small Alkyl Groups

“…On the other hand, the incorporation of a strong electrowithdrawing substituent, such as the cyano group, at the 3-position of the thiophene or Py ring induces interesting changes in properties of the corresponding CPs. 21,22 Thus, this substituent perturbs the π-conjugated system of the polyheterocycle reducing the barrier for electron injection, increasing the oxidation potential, and improving the electron transport properties. Interestingly, an early study devoted to examine the ability of different PPy derivatives to detect vapor gases showed that the incorporation of the cyano group at the N-position of the Py repeating units improves the capabilities of these materials as selective gas sensors.…”

“…On the other hand, the incorporation of a strong electro-withdrawing substituent, such as the cyano group, at the 3-position of the thiophene or Py ring induces interesting changes in properties of the corresponding CPs. , Thus, this substituent perturbs the π-conjugated system of the polyheterocycle reducing the barrier for electron injection, increasing the oxidation potential, and improving the electron transport properties. Interestingly, an early study devoted to examine the ability of different PPy derivatives to detect vapor gases showed that the incorporation of the cyano group at the N-position of the Py repeating units improves the capabilities of these materials as selective gas sensors. − Specifically, poly[ N -(2-cyanoethyl)pyrrole] (PNCEPy; Scheme ) was found to be an excellent detector of molecules in the vapor phase. − More recently, PNCEPy has been used to develop impedimetric immunosensors, ion-selective membranes, and electrochemical nanocoatings of metallic medical devices …”

Characterization and Properties of Poly[N‐(2‐cyanoethyl)pyrrole]

“…[27,28] On the other hand, the cyano group is a strong electronwithdrawing substituent able to modify the electronic properties of heterocyclic conducting polymers when it is incorporated at the b position of thiophene and pyrrole repeating units. [29,30] Thus, this substituent perturbs the p-conjugated system of such polymers reducing the barrier for electron injection, increasing the oxidation potential, and improving the electron transport properties. On the other hand, in an early study the cyano functionality was used to improve the abilities of PPy derivatives as selective gas sensors by incorporating it at the N position of pyrrole repeating units.…”