Synthesis and photoluminescence properties of polymer chains based on pre-designed heterometallic Al 4 Ln 4 molecular rings.

Presented herein is a series of chain compounds based on pre-designed heterometallic aluminum-lanthanide (Al-Ln) Al 4 Ln 4 molecular rings. Their photoluminescence quantum yield (PLQY) with Eu 3+ (30.41%) and Tb 3+ (41.44%) is at a high level among the clusters containing four Ln ions. This study significantly extends the family of Al-Ln heterometallic clusters and demonstrates the synergistic effect of heterometallic ions in enhancing their properties.