The chiral feature of γCD‐MOF, and especially the emergent cubic void, was not unveiled so far. Now, through the host–guest interaction between γCD‐MOF and achiral luminophores with different charges and sizes, the unique cubic chirality of the emerging void in γCD‐MOF as well as a size effect on CPL induction are revealed for the first time. Numerous achiral luminophores could be integrated into γCD‐MOF and emitted significantly boosted circularly polarized luminescence. While the small sized luminophores preferred to be loaded into the intrinsic void of γCD, large ones were selectively encapsulated into the cubic void. Interestingly, when the size of the guest luminophores was close to the cube size, it showed strong negative CPL. Otherwise, either positive or negative CPL was induced.

Circularly polarized luminescence (CPL) is attractive in understanding the excited‐state chirality and developing advanced materials. Herein, we propose a chiral reticular self‐assembly strategy to unite achiral AIEgens, chirality donors, and metal ions to fabricate optically pure AIEgen metal–organic frameworks (MOFs) as efficient CPL materials. We have found that CPL activity of the single‐crystal AIEgen MOF was generated by the framework‐enabled strong emission from AIEgens and through‐space chirality transfer from chirality donors to achiral AIEgens via metal‐ion bridges. For the first time, a dual mechano‐switched blue and red‐shifted CPL activity was achieved via ultrasonication and grinding, which enabled the rotation or stacking change of AIEgen rotors with the intact homochiral framework. This work provided not only an insightful view of the aggregation induced emission (AIE) mechanism, but also an efficient and versatile strategy for the preparation of stimuli‐responsive CPL materials.