thiophene acrylonitrile (TPyT) and phenyl acrylonitriles (TPyP and P2TPy) via low cost condensation reactions improved the linear optical, electronic and thermal properties of the synthesized compounds. Furthermore, the nonlinear absorption (NLA) was also enriched appreciably by increasing the conjugation. The three compounds showed an "effective two-photon absorption" phenomenon with the NLA coefficient
以
噻吩和2,4,6-三取代
吡啶为骨架,设计了一系列三角形分子(TPyT和TPyP)和具有供体-受体-供体(
DAD)结构排列的聚合物(P2TPy)。 (4-(癸氧基)苯基)-2,6-二(
噻吩-2-基)
吡啶核心结构首次通过微波辅助一锅反应合成。通过低成本的缩合反应取代
噻吩丙烯腈(TPyT)和苯基
丙烯腈(TPyP和P2TPy)扩展了系统的共轭,改善了合成化合物的线性光学,电子和热学性质。此外,通过增加共轭,非线性吸收(N
LA)也得到了明显的丰富。这三种化合物显示出“有效的两光子吸收” N
LA系数(βeff)约为10-10 m W-1的现象。通过聚合物P2TPy可以最好地实现制造全光学限位器件的适用性,因为它表现出明显更高的βeff(7.02×10-10 m W-1)和极低的光学极限阈值(1.42 J cm-2 )。