Heavy atom enhanced generation of singlet oxygen in novel indenofluorene-based two-photon absorbing chromophores for photodynamic therapy
作者:Changquan Tang、Ping Hu、En Ma、Mingdong Huang、Qingdong Zheng
DOI:10.1016/j.dyepig.2015.01.019
日期:2015.6
donor-acceptor-donor (D-A-D) motif. At the same time, upon excitation at 430 nm, 2.2–4.1 times of enhancement in the singlet oxygen generation yield was observed for the photosensitizers with the heavy atoms incorporated. The photosensitizers with heavy atoms also show increased singlet oxygen generation efficiencies upon two-photon excitation at 808 nm, compared to those photosensitizers without heavy
一系列基于茚并芴-双光子吸收发色团(的FL0,FL-2BrN,FL-1IN,FL-2IN,和FL-2IS已针对光动力疗法(PDT)进行了设计和合成。确定了这些生色团的双光子吸收(TPA)特性,并建立了它们的结构-性质关系。通过将吸电子卤素原子(如Br,I)掺入发色团的π共轭骨架中,由于形成了供体-受体-供体(DAD)基序,TPA截面值提高到了2707 GM。 。同时,在430 nm激发下,掺入重原子的光敏剂的单线态氧产生产率提高了2.2-4.1倍。与那些没有重原子的光敏剂相比,具有重原子的光敏剂在808 nm的双光子激发下还表现出更高的单线态氧产生效率。的光细胞毒性FL-2IN通过双光子激发(808 nm)对抗癌细胞表明,茚并芴基发色团是双光子PDT的有效单线态氧供体。