Precise, sensitive, and reversible thermochromic luminescent sensing facilitatedviabright high-temperature luminescent PEAMnBr_xI_3−x(x= 0/1/2/3)

Precise, sensitive, and reversible thermochromic luminescent sensing can be achieved by PEAMnBr_xI_3−x(x= 0/1/2/3). Their luminescence ratios of green to red exhibited a reversible linear response to the temperature increment process (from 40 °C to 120 °C), bright luminescence under high temperature, and reversible heating-cooling circulation performance. Based on the thermochromic luminescence properties, the PEAMnBr₂I-polymer film was used for precise and real-time temperature sensing. A deep understanding of their thermochromic luminescence mechanism can facilitate the design of thermochromic materials with high performance and their wider applications.