Lanthanide-Incorporated Polyoxometalates Assembled from Mixed-Heteroatom-Oriented Three-Layered Cage Clusters.

Discovering innovative metal-oxo cluster materials with uncommon building blocks and exploiting their application potentiality are fairly challengeable. Here, we provide a novel type of lanthanide-incorporated polyoxometalates [H 2 N(CH 3 ) 2 ] 10 Na 8 H 6 {[Ln 0.5 /Na 0.5 (HGCA)(H 2 O) 1.5 ] 2 [(BiO 3 )(SeO 3 ) 2 W 21 O 66 ] 2 }·36H 2 O [Ln = Eu 3+ ( 1 ), Er 3+ ( 2 ), H 2 GCA = α-glycolic acid] synthesized by a dual-heteroatom-directed synergetic strategy, which are established from two unique Bi III -Se IV heteroatom-oriented cylindrical three-layered [(BiO 3 )(SeO 3 ) 2 W 21 O 66 ] 13- cage clusters integrated by lanthanide-organic groups. Compound 1 works as a fluorescence probe for high-sensitivity detection toward a neurotransmitter dopamine. This finding not only shows the enormous possibility and feasibility to create novel polyoxometalate building units by means of the self-categorization of different heteroatoms, which are subsequently employed for further assembly chemistry, but also provides a platform to exploit latent utilizations of polyoxometalate-based materials in the realm of detecting biological molecules.