Broad-Temperature-Range Thermoresponse of Cu(I)-Based Organic-Inorganic Hybrid Metal Halides with Multimode Dynamic Luminescence

• • MPC-W demonstrates continuous luminescence color tuning from blue to white across 77–297 K, enabling high-resolution ratiometric temperature sensing over a 220 K span with visual readout. • • An abnormal luminescence enhancement is observed from 217 to 463 K, a 246 K operational window, which is rare and could enable self-referencing thermal probes with intensity-based calibration. • • Reversible chemical transformation between MPC-W, MPC-B, and MPC-Y under stimuli provides three distinct emission states (white, blue, yellow), offering a platform for multi-level anti-counterfeiting and information encryption. • • The coexistence of three luminescence mechanisms (CL, STE, CC) in a single material allows excitation-wavelength-dependent emission, adding an extra dimension for multiplexed optical coding and sensing.