Hybrid Assemblies of Eu‐Containing Polyoxometalates and Hydrophilic Block Copolymers with Enhanced Emission in Aqueous Solution

Core–shell nanostructures of a photoluminescent Eu-containing polyoxometalate (Eu-POM) with double-hydrophilic neutral–cationic block copolymer PEO114-b-PDMAEMA16 in aqueous solution were fabricated by self-assembly driven by electrostatic interactions (see scheme; neutral block blue, cationic block red). The emission of Eu-POM, which depends on the charge ratio of the Eu-POM/copolymer system, is enhanced up to 20-fold by complexation with the cationic PDMAEMA block.