化学
镧系元素
铕
离子半径
铽
配体(生物化学)
结晶学
吡啶
发光
顺磁性
离子键合
金属
化学计量学
离子
无机化学
药物化学
物理化学
有机化学
生物化学
物理
受体
量子力学
光电子学
作者
S. S. Degtyareva,Daniil A. Bardonov,A. V. Afanas'eva,Lada N. Puntus,Konstantin А. Lyssenko,Kirill P. Birin,Mikhail E. Minyaev,Julia V. Burykina,Ilya V. Taydakov,Evgenia A. Varaksina,Ilya E. Nifant’ev,Dmitrii M. Roitershtein
标识
DOI:10.1021/acs.inorgchem.3c03492
摘要
LnCl3(THF)3 (Ln = Y, La ÷ Nd, Sm ÷ Lu) readily react with the tridentate 1,3,5-trimethyl-1,3,5-triazacyclohexane (Me3tach) ligand to form mono- or binuclear lanthanide trichloride complexes, depending on the stoichiometry of the reaction and the ionic radius of the metal: mononuclear pseudosandwich [LnCl3(Me3tach)2], (Ln = Y, La ÷ Ho) or binuclear complexes [Ln2Cl6(Me3tach)3], or [LnCl3(Me3tach)(THF)]2 (Ln = Sm, Tb). Detailed analysis of the NMR data of [LnCl3(Me3tach)2] complexes with paramagnetic lanthanide ions showed that their structures remained unchanged in the toluene solution. A series of isomorphous complexes [LnCl3(Me3tach)(Py)2] (Ln = La, Sm, Tb, Er, Lu; Py = pyridine) have been obtained by the recrystallization of either mononuclear or binuclear complexes from pyridine. Complexes of terbium and europium ions with the Me3tach ligand exhibit relatively high quantum yields of metal-centered luminescence (0.39 and 0.32, respectively).
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