A polymerizable fluorescent monomer (Eu(AA) (BA)2Phen) was synthesized with Eu3+

acrylic acid (AA)

benzoic acid (BA)

and 1

10-phenanthroline (Phen)

and the chemical structure was characterized by elemental analysis and Fourier-transform infrared spectroscopy (FTIR).The results indicted that the polymerizable fluorescent monomer was successfully prepared.The fluorescent nanoparticles were prepared with styrene (St)

sodium p-styrenesulfonate (NaSS)

and polymerizable fluorescent monomer using microwave-assisted soap-free emulsion polymerization technique.The chemical structure of poly(St-NaSS-Eu-(AA)(BA)2Phen) was characterized by FTIR.The result revealed that copolymerization occurred among St

NaSS

and Eu(AA) (BA)2Phen

and the poly(St-NaSS-Eu(AA) (BA)2Phen) compolymer was prepared successfully.Moreover

it was found that the poly(St-NaSS-Eu(AA) (BA)2Phen) had good thermal stability shown by thermo-gravimetric analysis (TGA).The morphologies and particle sizes of latexes nanoparticles were observed using transmission electron microscope (TEM) and scanning electron microscope (SEM)

and the images showed that the particles had sphere-shapes

whose size was 35 nm.Compared with conventional heating

poly(St-NaSS-Eu(AA) (BA)2Phen) latexes nanoparticles obtained by microwave irradiation were much smaller.The average particle size and its distribution were measured by photon correlation spectroscopy (PCS)

and the result showed that the hydrodynamic diameters and distribution of particles both increased gradually with the contents of Eu(AA) (BA)2Phen.In addition

fluorescent spectrum test indicated that the nanoparticles had obvious emission at 595 nm and 619 nm with excitation at 277 nm.