Luminescence properties of heterometallic lanthanide complexes based on lithium β-diketonate bearing <i>tert</i>-butyl and acetal group

Nonsymmetrical lithium β-diketonate (LiL) containing tert-butyl and acetal substituents at the dicarbonyl cage has been synthesized for the first time and is structurally characterized (CIF file CCDC no. 2364039 (I)). The reactions of functional lithium β-diketonate with salts of trivalent rare-earth metals in methanol afford heterobinuclear complexes [(LnL3)(LiL)(MeOH)] (Ln = Eu, Gd, Tb). The structures of the complexes are characterized by X-ray diffraction (XRD) (CIF files CCDC nos. 2364040 (II), 2364041 (III), 2364042 (IV)).