Salen-Type Lanthanide Complexes with Luminescence and Near-Infrared (NIR) Properties

Two type lanthanide complexes obtained by salen-type ligand N,N’-ethylenebis(salicylideneimine) (H2La) and N,N’-ethylene-bis(3-methoxysalicylideneimine) (H2Lb) have been isolated. They are 2D coordination polymer [Yb(H2La)1.5(NO3)3] n (1), mononuclear Ln(H2Lb)(NO3)3 [Ln = Sm (2), Ho (3)]. The structures of 1–3 were determined by single crystal X-ray crystallographic studies and their photophysical properties were investigated.