Abstract
In order to evaluate the structural and spectroscopic influence of further pyridyl ligands, e.g. as sensitizers for Ln3+‐based photoluminescence, the ligand trans‐1‐(2‐pyridyl)‐2‐(pyridyl)ethylene (tppe) was selected. In reactions with trivalent chlorides of the lanthanides and thiazole (thz), complexes of the formula [LnCl3(tppe)2(thz)2] were obtained for Ln = Nd, Tb, Ho, Er. They are isotypic along the series of the lanthanides and provide ligand sensitizer functions for the Ln‐luminescence emission of Nd3+ and Er3+ in the near infrared region. Alike 1,2‐bis(4‐pyridyl)ethylene, no sensitization is observed for the 4f‐based emission of Tb3+ in the visible.
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