Preparation And Luminescence Properties Of Nano Hybrid Luminescent Materials Based On Laponite And Eu(TTAn)

Lanthanide-based organic-inorganic hybrid materials are of immense importance for various applications nowadays, while it still remains a significant challenge to achieve high luminescence efficiency in aqueous environment due to Ln3+ of the luminescence quenching by water molecule.In this study, we develop a simple and environmentally friendly two-step strategy to prepare strongly red-light emitting luminescent organic-inorganic hybrid materials by first in situ forming Eu3+-β-diketonate complexes on laponite platelets in water and subsequently increasing the coordination number of the complexes via the modification with an ionic liquid, which can fully protect lanthanide ions from water molecule quenching and improve the luminescence efficiency. The result is that the removal of the abundant protons on the laponite platelets through a mechanism of synergic effect of ion exchange and neutralization drives the formation of Eu3+-β-diketonate complexes with high coordination number. The resulting highly nano hybrid luminescent materials has also been used as building blocks for fabricating transparent film on a substrate, white light LED, as well as flexible and crack resistive nano- materials /polymer composite film by aqueous solution process.Our results represent a major step forward in the research on nano hybrid luminescent materials that is highly luminescent in aqueous environment and have also shown great interest for applications in different fields of optoelectronics and bioimaging. The flexible transparent luminescent film can be used in practical applications of flexible and foldability optoelectronic devices. Furthermore, our results highlight the importance of understanding the influence of inorganic matrices on the properties of lanthanide complexes in nano hybrid luminescent materials and serve as a basis for the rational design of highly luminescent materials.