Synthesis, Structures, and Luminescent Properties of Chloride and Nitrate Ln III Complexes Coordinated by tris(Pyrazolyl)methane

• Published in: European journal of inorganic chemistry Vol. 26; no. 25
• Main Authors: Lyubov, Dmitry M., Mahrova, Tatyana V., Cherkasov, Anton V., Fukin, Georgy K., Fedorov, Yury V., Trifonov, Alexander A.
• Format: Journal Article
• Language: English
• Published: 01.09.2023
• ISSN: 1434-1948; 1099-0682
• DOI: 10.1002/ejic.202300292

Abstract We report the synthesis of Ln 3+ nitrate [Ln(Tpm)(NO 3 ) 3 ] ⋅ MeCN (Ln=Yb ( 1Yb ), Eu ( 1Eu )) and chloride [Yb(Tpm)Cl 3 ] ⋅ 2MeCN ( 2Yb ), [Eu(Tpm)Cl 2 (μ‐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 Eu 3+ analogue 2Eu adopts a binuclear structure due to two μ 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)(NO 3 ) 3 ] ⋅ MeCN, Ln=Tb ( 1Tb ), Dy ( 1Dy ); [Ln(Tpm)Cl 3 ] ⋅ 2MeCN, Ln=Tb ( 2Tb ), Dy ( 2Dy )).