“…So far, many acid–base responsive luminescent materials have been explored to achieve this purpose, including, but not limited to, lanthanide complex, 13 inorganic nanocluster, 14 metal–organic framework, 15 hydrogel, 16 quantum dot, 17 molecular and polymer materials. 18–22 Thereinto, major efforts are centered on low-mass fluorophores; polymer-based counterparts, in contrast, show obvious technical superiority, such as excellent processability, facile modification and signal amplification.…”