Figure 1. (IMAGE) Science China Press Caption (a) RTP emission of PSP@PVA-N (λex = 550 nm) (b) Structural transformation of BR, BPB, and TBPB in aqueous solution with differing pH values and their charge distribution in the ground state (S0). The certain color regions (orange, dark pink and blue) corresponded to the certain functional group of molecules. Credit ©Science China Press Usage Restrictions Use with credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.