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AD -A-D' type pure organic molecule,n amed ODFRCZ, has unique triple-emission character covering fluorescence,p hosphorescence,a nd delayed fluorescence (DF). The phosphorescence of ODFRCZ has ar ather long lifetime of about 350 ms at room temperature.O ne dimer of ODFRCZ with enhanced parallel molecular packing acts more effectively to prompt ISC processes,w hichf urther generates room-temperature phosphorescence (RTP),o wing to the larger transition dipole moment and closer energy level between S 1 and T n .ODFRCZ is arare example of an organic RTPmolecule that shows dual-stimuli responsiveness of dualmode mechanochromism (fluorescence red-shift and RTP/DF on-off switch)a nd reversible crystal-state photochromism. This work may broaden the knowledge for stimuli-responsive RTPorganic molecules and lay the foundation for their widescale applications.Supportinginformation (synthesis procedures and molecularcharacterization of ODFRCZ/ODBTCZ, single crystal data, TD-DFT results, characterization of reversibility) and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

This Minireview summarizes the recent progress of stimuli‐responsive purely organic phosphorescence materials. Organic phosphorescence is closely related to the intermolecular interactions, because such interactions are beneficial to promote spin orbital coupling (SOC) and boost intersystem cross (ISC) efficiency and finally are conducive to satisfactory phosphorescence. It is found that the intermolecular interactions, which are essential for organic phosphorescence, are easily disturbed by external stimuli such as mechanical force, photon, acid, chemical vapor, leading to the luminescence change. According to this principle, various purely organic phosphorescence materials sensitive to external stimuli have been developed. This Minireview categorizes reported stimuli‐responsive purely organic phosphorescence materials on the basis of different stimuli, including mechanochromism, mechanoluminescence, photoactivity, acid‐responsiveness and other stimuli. Some prospective strategies for constructing stimuli‐responsive purely organic phosphorescence molecules are provided.