Abstract
The three‐dimensional framework 3∞[LaCl3(pyz)] and the dimeric complexes [Ln2Cl6(pyz)(py)6]·2pyz (Ln = Sm, Er) were obtained from solvothermal reaction of the respective chlorides LnCl3 with pyrazine (pyz) in pyridine (py) at 200 °C. In the compounds, pyrazine ligands interlink Ln‐cations: in the complexes to a dimer, in the framework structure to 2D sheets, which are further connected via chloride bridges. This results in an uninodal 6‐c net with the point symbol (48.67) and a variant of the sxa topology. The dimeric complexes exhibit 4f‐based emission in the visible for samarium and in the NIR for erbium, both sensitized by the pyrazine ligands, as mechanistic insights show.
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