https://www.ijert.org/two-dinuclear-lanthanide-coordination-er-yb-complexes-structure-and-near-infrared-luminescence
Two Dinuclear Lanthanide Coordination Er(???),Yb(???) Complexes: Structure and Near-Infrared Luminescence - written by Ali. A Shamshoom, Cai. Yun Wang, Mo....
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