Achieving multi-stimuli-responsive and color-tunable luminescence from ultralong organic phosphorescent materials†

Stimuli-responsive ultralong organic phosphorescence (UOP) materials have drawn widespread attention owing to their potential in intelligent optoelectronics. However, their tunable emission characteristics are typically observed only after the removal of irradiation sources, which makes their applications heavily reliant on time-resolved technology. Herein, we propose a facile approach to achieve multi-stimuli-responsive and steady-state color-tunable luminescence for direct visualization-based applications by regulating multimode emissions in UOP materials. The steady-state emission color of the UOP material (PhP-B) can be regulated by multiple stimuli, including excitation wavelength, temperature, oxygen environment, mechanical force, and decay time. This work provides not only a new platform for developing multi-stimuli-responsive UOP materials, but also extends the direct visualization-based applications in multicolor patterns and visual monitoring.