Communications Chemistry, Published online: 19 September 2026; doi:10.1038/s42004-026-02202-4Protonation can introduce an extra handle, besides light, in controlling the properties of photoswitches, opening the way to multi-stimuli responsive functional materials. Here, the authors report a pair of halochromic quinoline-based hydrazone photoswitches that show divergent photophysical properties based on the protonation site, yielding switches that can be activated using visible to near-infrared light.

POMONA, CA—In a development that sources describe as both an incredible honor and the beginning of a long decline, colleagues confirmed Friday that associate professor Dr.