Near-Infrared Luminescent Hybrid Materials Doped with Lanthanide (Ln) Complexes (Ln = Nd,Yb) and Their Possible Laser Application

摘要

The crystal structures of ternary Ln(DBM)_3phen complexes (DBM = dibenzoylmethane,phen = 1,10-phenanthroline,and Ln = Nd,Yb) and their in situ syntheses via the sol-gel process are reported.The properties of the Ln(DBM)_3phen complexes and their corresponding Ln~(3+)/DBM/phen-co-doped luminescent hybrid gels obtained via an in situ method (Ln-D-P gel) have been studied.The results reveal that the lanthanide complexes are successfully in situ synthesized in the corresponding Ln-D-P gels.Both Ln-(DBM)_3phen complexes and Ln-D-P gels display sensitized near-infrared (NIR) luminescence upon excitation at the maximum absorption of the ligands,which contributes to the efficient energy transfer from the ligands to the Ln~(3+) ions (Ln = Nd,Yb),an antenna effect.The radiative properties of the Nd~(3+) ion in a Nd-D-P gel are discussed using Judd-Ofelt analysis,which indicates that the ~4F_(3/2) - >~4I_11/2 transition of the Nd~(3+) ion in the Nd-D-P gel can be considered as a possible laser transition.