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Figure 5: Schematic illustration of induced CPL with opposite polarization from dyes and QDs in chiral MOF. Well-arranged chiral cages are formed by the mixed ligands through coordination with Zn ions (gray rods: Hmim, purple spirals: L-His). The size-matched dyes assemble into the chiral cages during framework formation. Thus, the induced CPL of dyes follows the chirality of cages with right-handed polarization (rCPL). However, the large-sized QDs will distribute into the framework. It is surrounded by the chiral cages, which show inverted CPL with left-handed polarization (lCPL).