mechanical properties, good processing properties, ease of chemical modification, and easy preparation processes. [6][7][8][9] It is clear from the Jablonski diagram that to achieve phosphorescence emission, we can follow two approaches. One is to promote the S 1 → T n intersystem crossing. [10] The second is to suppress the nonradiative relaxation processes. Traditionally, organic molecules cannot emit phosphorescence at room temperature due to their inherently weak spin-orbit coupling, which means that excitons cannot efficiently span single and triplet states. [11] Therefore, it is often necessary to create strong intermolecular interactions to build a rigid network structure to enable phosphorescence generation and enhancement at room temperature. It is still a difficult task to build a non-toxic, non-hazardous, environmentally friendly, room-temperature phosphorescent material that can achieve colorful and long lifetimes. Most natural polymers are biocompatible, environmentally friendly, and non-toxic. Therefore, it is essential to explore more natural polymers with RTP properties that can be used to construct RTP emitting materials with long lifetimes. Usually, in order to obtain longer-lived and more-efficient phosphorescence emissions, researchers increase the inter-system scattering rate by introducing heavy atoms to increase the spin-orbit coupling between single and triplet states [12] or by cross-linking and polymerizing to produce a rigid environment to suppress non-radiative transitions. [13] Actually, several macrocycles, such as cyclodextrin and cucurbituril, have been used to tune phosphorescent characteristics. [14] Most of these only show adjustability in solution, reports on tunable RTP in the solid state are scarce.There is an increasing interest in stimulus-responsive luminescent materials that can undergo physical or chemical changes in response to external stimuli, such as mechanical forces, light, PH, and heat, due to the possible applications of such materials in the fields of lighting and display, optoelectronic devices, data storage, anti-counterfeiting, bio-imaging, and sensing. [15][16][17][18][19][20][21] To date, most of the stimulus-responsive luminescent materials have been based on fluorescence. [22][23][24] Compared with fluorescence emission, phosphorescence emission
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