Synthesis and physicochemical characterization of copolymers of 3-octylthiophene and thiophene functionalized with azo chromophore

Third-Order Nonlinear Optical Behavior of Novel Polythiophene Derivatives Functionalized with Disperse Red 19 Chromophore

“…This difference was sufficient to increase the nonlinear properties of the polymers in solid state. The regioregularity (diads and triads) molecular weight distribution (Mn and Mw) and thermal properties ( and ) are similar with those normally found in PT synthesized according to the same regioselective method [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. These values were also similar between both copolymers; only the copolymer obtained from 3-HT showed a higher polydispersity consistent with the presence of a greater amount of TDR19 in the copolymer P1.…”

“…Moreover, the presence of various substituents in 3-and/or 4-positions of the thiophene ring results in new materials which combine the physical properties of the polyconjugated backbone and the substituent group. For instance, a push-pull chromophore as a side group 2 International Journal of Polymer Science in the conjugated backbone enhanced charge-transfer properties and second-order NLO responses of a polythiophene [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. The third-order NLO response in PT and other conjugated polymers has been also reported although less extensively in comparison with the second-order one, by using different techniques such as electroabsorption andscan [31,32].…”