Synthesis and optical nonlinear property of Y-type chromophores based on double-donor structures with excellent electro-optic activity
作者:Yuhui Yang、Huajun Xu、Fenggang Liu、Haoran Wang、Guowei Deng、Peng Si、Heyan Huang、Shuhui Bo、Jialei Liu、Ling Qiu、Zhen Zhen、Xinhou Liu
DOI:10.1039/c4tc00508b
日期:——
chromophores showed better thermal stability with their decomposition temperatures all above 240 °C. Most importantly, the high molecular hyperpolarizability of these chromophores can be effectively translated into large electro-optic (EO) coefficients (r33) in poled polymers. The doped film-A containing 25 wt% chromophore FTC-yh1 displayed a value of 149 pm V−1 at 1310 nm, and the doped film-B containing
合成并系统研究了新的Y型发色团FTC-yh1和FTC-yh2,其含有双(N,N-二乙基)苯胺作为新型电子给体,噻吩作为π共轭桥和三氰呋喃(TCF)作为受体。在本文中。密度泛函理论(DFT)用于计算这些生色团的HOMO-LUMO能隙和一阶超极化率(β)。这些生色团的分解温度都高于240°C,表现出更好的热稳定性。最重要的是,这些生色团的高分子超极化能力可以有效地转化为大的电光(EO)系数(r 33)在极性聚合物中。含25%(重量)发色团FTC-yh1的掺杂膜A在1310 nm处显示值为149 pm V -1,而含FTC-yh2的掺杂膜B在浓度为25时显示143 pm V -1的值重量%。这些值几乎是通常报道的传统单(N,N-二乙基)苯胺非线性光学(NLO)生色团FTC的EO活性的四倍。r 33值高表明bis(N,N-二乙基)苯胺单元可有效提高电子给体能力并减少分子间静电相互作用,从而增强宏观