Guest-host doped strategy for constructing ultralong-lifetime near-infrared organic phosphorescence materials for bioimaging

Organic near-infrared room temperature phosphorescence materials have unparalleled advantages in bioimaging due to their excellent penetrability. However, limited by the energy gap law, the near-infrared phosphorescence materials (>650 nm) are very rare, moreover, the phosphorescence lifetimes of these materials are very short. In this work, we have obtained organic room temperature phosphorescence materials with long wavelengths (600/657-681/732 nm) and long lifetimes (102-324 ms) for the first time through the guest-host doped strategy. The guest molecule has sufficient conjugation to reduce the lowest triplet energy level and the host assists the guest in exciton transfer and inhibits the non-radiative…

• NN
  National Natural Science Foundation of China

  Awards: 22071184, 81921004, 51873092, 51961160730, 51873092, LY20B020014, 22071184, 51961160730, 51873092, and 81921004, 51961160730
• NU
  Nankai University
• SF
  Science Fund for Distinguished Young Scholars of Tianjin

  Award: 19JCJQJC61200
• NS
  Natural Science Foundation of Zhejiang Province

  Award: LY20B020014