Water-Mediated Electronic Modulation in Boron–Nitrogen Multi-resonance Thermally Activated Delayed Fluorescence Emitters

O) → B(MR) with water is indispensable for forming water-B/N MR complexes. These results uncover water as a previously overlooked yet ubiquitous perturbing agent in B/N-type MR systems, opening new opportunities for understanding and exploiting their behavior under aqueous influence.