ABSTRACT Water-soluble luminescent material was developed by introducing europium (Eu (III)) ions into the core of a star polymer. Living radical polymerization was used to obtain the star polymer. The strategy to introduce Eu (III) ions into the star polymer was studied using poly (methyl methacrylate) as an arm. The best Eu (III) ion introduction was obtained by simultaneous introduction, resulting in about 30 µmol/g-polymer, which needed only ...