Nonlinear optical activity of push–pull indolizine-based chromophores with various acceptor moieties
作者:Alexey A. Kalinin、Guzel M. Fazleeva、Timur I. Burganov、Liliya N. Islamova、Alina I. Levitskaya、Yulia B. Dudkina、Gulnara R. Shaikhutdinova、Gulshat G. Yusupova、Maxim A. Smirnov、Tatyana A. Vakhonina、Nataliya V. Ivanova、Ayrat R. Khamatgalimov、Sergey A. Katsyuba、Yulia H. Budnikova、Irek R. Nizameev、Marina Yu. Balakina
DOI:10.1016/j.jphotochem.2018.07.018
日期:2018.9
respectively, good agreement with DFT estimations is obtained. The nonlinear optical coefficient for poled PMMA-based films, containing 20 wt% of isomeric indolizine chromophores with weaker dicyanomethylene (DCM) acceptor and with π- bridge expanded by isophorone moiety, achieves 36 pm/V, thus exceeding those for materials containing chromophores with stronger Ph-TCF or Hex-TCP acceptors and with short vinylene
首次研究并比较了具有不同受体部分的基于吲哚嗪的推挽发色团的非线性光学(NLO)活性。所有发色团在光谱的可见(橙红色)部分均显示出较强的吸收带,其ε为。10 5 L∙cm -1 ∙M -1特别取决于介质极性。用Hex-TCP代替Ph-TCF受体会导致第一个超极化率值增加两倍。通过电化学方法估算的能隙按系列ΔE1a ,b >ΔE3a ,b >ΔE2a ,b减小对于分别具有Ph-TCF,DCM和Hex-TCP受体的化合物,与DFT估计值具有良好的一致性。极化PMMA基薄膜的非线性光学系数达到36 pm / V,包含具有20重量%的异构吲哚嗪发色团,较弱的二氰基亚甲基(DCM)受体和被异佛尔酮部分扩展的π桥的非线性光学系数,因此超过了包含更强的Ph-TCF或Hex-TCP受体,并带有短的亚乙烯基π桥。