Emerging Cubic Chirality in gamma CD-MOF for Fabricating Circularly Polarized Luminescent Crystalline Materials and the Size Effect

摘要

The chiral feature of gamma CD-MOF, and especially the emergent cubic void, was not unveiled so far. Now, through the host-guest interaction between gamma CD-MOF and achiral luminophores with different charges and sizes, the unique cubic chirality of the emerging void in gamma CD-MOF as well as a size effect on CPL induction are revealed for the first time. Numerous achiral luminophores could be integrated into gamma CD-MOF and emitted significantly boosted circularly polarized luminescence. While the small sized luminophores preferred to be loaded into the intrinsic void of gamma CD, 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.