title: Luminescence enhancement after adding stoppers to europium(III) nanozeolite L.
abstract: Stopper molecules attached to nanozeolite L (NZL) boost the luminescence of confined Eu(3+)-β-diketonate complexes. The mechanism that is responsible was elucidated by comparing two diketonate ligands of different pK(a) and two aromatic imines, and by applying stationary and time resolved spectroscopy. The result is that the presence of the imidazolium based stopper is favorable to the sustainable formation of Eu(3+)-β-diketonate complexes with high coordination by decreasing the proton strength inside the channels of NZL. A consequence is that strongly luminescent transparent films can be prepared using aqueous suspension of the stopper modified composites.
authors: School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130 (China).
authors: Peng
authors: P
authors: Li
authors: Yige
authors: Y
authors: Wang
authors: Huanrong
authors: H
authors: Li
authors: Gion
authors: G
authors: Calzaferri
keywords: luminescence; rare earth elements; supramolecular chemistry; thin films; zeolites