LAUSR

Abstract In this paper, we use an organic ligand with D-π-A structure to assemble a series of Ln-coordination complexes with Ln2 cores. The typical visible or NIR lanthanide emissions can be sensitized via one-photon absorption (OPA) or two-photon absorption (TPA) pathway. For which, white light and NIR emissions are obtained in Sm2L2 at the excitation of 365 nm under ambient conditions by OPA pathway. And efficient up-conversion emission was observed in Sm2L2 and Eu2L2 at the excitation of 810 nm by TPA pathway. The thus obtained down- or up-conversion luminescence (DCL/UCL) provides potential in lighting and displaying devices, lasers, optical amplifiers, biological labels, and so on.