A new polysilsesquioxane bridge (Phen–OH–Si) was synthesized here using 2-(2-hydroxyphenyl)-imidazo[4,5-f]-1,10-phenanthroline (Phen–OH) and 3-(triethoxysilyl)propyl isocyanate respectively as a ligand of Eu3+ ion and a siloxane network precursor. Then, an organic–inorganic hybrid material covalently grafted with an Eu3+ complex (denoted as Eu(Phen–OH–Si)2Phen) was synthesized by coordination of an Eu3+ ion with a multifunctional precursor Phen–OH–Si and a second ligand Phen in a sol–gel process. This hybrid material was found to exhibit intensive red luminescence under UV light triggered by the ligand antenna effect. Further luminescent studies indicate that Eu(Phen–OH–Si)2Phen not only displays high sensitivity sensing targeted at fluoride ions, but also exhibits distinct solvent-dependent luminescent spectra with emission intensities that are significantly quenched by N,N-dimethylformamide.
|Journal||Journal of Photochemistry and Photobiology A: Chemistry|
|Publication status||Published - 1 Sep 2019|
- Europium ion
- Organic–inorganic hybrid material
ASJC Scopus subject areas
- Chemical Engineering(all)
- Physics and Astronomy(all)