Homochiral Indium‐Oxo Clusters With Multichromatic Circularly Polarized Luminescence

ABSTRACT The development of chiral main‐group metal‐oxo clusters (MOCs) exhibiting high‐performance circularly polarized luminescence (CPL) remains a significant challenge. This study presents a generalizable strategy to successfully synthesize a series of chiral indium‐oxo clusters (cInOCs). These cInOCs can further self‐assemble into supramolecular absolute helices through intermolecular interactions, exhibiting strong chirality and intense blue CPL with a dissymmetry factor g lum of 0.012–0.013. To our knowledge, these cInOCs represent the first intrinsically CPL‐active main‐group MOCs, whose performance rivals or surpasses that of previously reported dye‐doped chiral main‐group MOCs systems. Capitalizing on the substantial pore channels within the cInOCs, green and yellow fluorescent dye molecules were encapsulated in situ, yielding cInOCs@Dyes composites with color‐tunable CPL properties. Efficient chirality transfer from the cInOC host to the guest dyes led to enhanced and tunable photoluminescence, alongside highly adjustable and amplified CPL. A maximum g lum of 0.037 was attained, approximately three times greater than that of the pristine cInOCs. Furthermore, the successful processability of these cInOCs or cInOCs@Dyes composites into flexible, transparent films highlights their considerable potential for practical applications in optical and photonic devices.