Figure 2. Schematic illustration of the possible fluorescence mechanism for P1, P2, and P3 (A) and molecular interactions in P1 (B). (C) Molecular structure of P1. Reproduced with permission: Copyright 2019, American Chemical Society.[43] (D) Schematic illustration of the CTE mechanism in disulfide containing HBPSi. Reproduced with permission: Copyright 2022, John Wiley and Sons.[40] Molecular structure (E) and fluorescence microscope images (F) of HBPSi contains C=C-C=O segment. Reproduced with permission: Copyright 2020, The Royal Society of Chemistry.[41]