Synthesis of Full Color Hybrid Materials Using POSS Ionic Liquids.

We report that by dispersing various luminescent conjugated molecules in the low-polarity polyhedral oligomeric silsesquioxane (POSS) ionic liquid (IL), higher luminescent efficiencies can be obtained compared to those in the IL without POSS. In addition, the energy transfer efficiency between loaded dyes in ILs can be enhanced by the POSS core because of enhanced anion/cation and hydrogen bond interactions, according to the analyses with a Stern-Volmer plot. Based on these findings, we obtained white-light emitters by adding multiple luminescent dyes by employing POSS-IL as a matrix. Furthermore, it was shown that exciplex emission through intermolecular interactions between the luminescent polymer and the exciplex pair molecule can be obtained by suppressing the aggregation of polymers and inducing exciplex formation with POSS. These results are expected to be applicable to developing fluid-type luminescent materials based on ILs.