Scheme 1. (IMAGE) Science China Press Caption Schematic illustration of the synthesis of PHM, the proposed fluorescence tuning mechanisms, and the tunable luminescent responses of PHM toward different external stimuli. 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.