Synthesis and luminescent properties of a novel green-emitting Tb(III) complex and the excellent thermal stability for application

• SPSA-Tb(III) was prepared by the method of emulsion polymerization.
• SPSA-Tb(III) can exhibit excellent Tb(III) characteristic emissions.
• SPSA-Tb(III) shows high thermal stability.
• SPSA-Tb(III) has short lifetime and high color quality.

A green-emitting Tb(III) complex based on siloxane-modified pressure sensitive adhesives (SPSA-Tb(III)) was successfully synthesized by emulsion polymerization. Siloxane-modified pressure sensitive adhesives (SPSA) were used as host materials. The structural coordination, photoluminescence excitation (PLE) and luminescence (PL) spectra, and thermal characterization of this luminescent polymer were investigated. The result from the FT-IR spectra reveals that SPSA have successfully coordinated with the Tb(III) ions. The luminescent analysis indicates that SPSA-Tb(III) displays Tb(III) typical emission peaks at 489, 545, 583, and 622 nm under the excitation of 369 nm. When monitored at 545 nm, strong and sharp excitation bands appear from 300 to 500 nm. And SPSA-Tb(III) has short lifetime (0.25 ms). Meanwhile, SPSA-Tb(III) exhibits high thermal stability (Td = 402 °C) owing to the high bond dissociation energy of SiO bonds. All the results suggest that it is expected to be used as a superior green-emitting material under high temperature.