Phosphorescence energy transfer systems have been applied in encryption, biomedical imaging and chemical sensing. These systems exhibit ultra-large Stokes shifts, high quantum yields and are colour-tuneable with long-wavelength afterglow fluorescence (particularly in the near-infrared) under ambient conditions. This review discusses triplet-to-singlet PRET or triplet-to-singlet-to-singlet cascaded PRET systems based on macrocyclic or assembly-confined purely organic phosphorescence introducing the critical toles of supramolecular noncovalent interactions in the process. These interactions promote intersystem crossing, restricting the motion of phosphors, minimizing non-radiative decay and organizing donor–acceptor pairs in close proximity. We discuss the applications of these systems and focus on the challenges ahead in facilitating their further development.

磷光能量转移系统已应用于加密、生物医学成像和化学传感。这些系统表现出超大斯托克斯位移、高量子产率，并且在环境条件下可通过长波长余辉荧光（特别是在近红外区域）进行颜色调谐。本综述讨论了基于大环或组装限制的纯有机磷光的三重态到单重态 PRET 或三重态到单重态到单重态级联 PRET 系统，在该过程中引入了超分子非共价相互作用的关键任务。这些相互作用促进了系间交叉，限制了磷光体的运动，最大限度地减少非辐射衰变并将供体-受体对组织得非常接近。我们讨论这些系统的应用，并重点关注促进其进一步发展所面临的挑战。