Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume 26, Issue 25, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.202300292
Keywords
lanthanides; coordination compounds; tripodal ligands; luminescence; structure elucidation
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In this study, the crystal structures of Ln(3+) nitrate and chloride complexes coordinated by neutral tripodal tris(3,5-dimethylpyrazolyl)methane (Tpm) were reported. The nitrate complexes were mononuclear, while the chloride complexes of europium and ytterbium were binuclear. The europium complexes exhibited typical lanthanide luminescence.
We report the synthesis of Ln(3+) nitrate [Ln(Tpm)(NO3)(3)].MeCN (Ln= Yb (1Yb), Eu (1Eu)) and chloride [Yb(Tpm)Cl-3].2MeCN (2Yb), [Eu(Tpm)Cl-2(mu-Cl)] 2 (2Eu) complexes coordinated by neutral tripodal tris(3,5-dimethylpyrazolyl)methane (Tpm). The crystal structures of 1Ln and 2Ln were established by single crystal X-ray diffraction, while for 1Yb high resolution experiment was performed. Nitrate complexes 1Ln are isomorphous and both adopt mononuclear structure. Chloride 2Yb is monomeric, while Eu3+ analogue 2Eu adopts a binuclear structure due to two mu 2-bridging chloride ligands. The typical lanthanide luminescence was observed for europium complexes (1Eu and 2Eu) as well as for terbium and dysprosium analogues ([Ln(Tpm)(NO3)(3)].MeCN, Ln= Tb (1Tb), Dy (1Dy); [Ln(Tpm)Cl-3].2MeCN, Ln= Tb (2Tb), Dy (2Dy)).
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