A Series of Heteromultinuclear Zinc(II)–Lanthanide(III) Complexes Based on 3-MeOsalamo: Syntheses, Structural Characterizations, and Luminescent Properties

Using 3-MeOsalamo H 2 L (H 2 L = 1,2-bis(3-methoxysalicylideneaminooxy)ethane) with Zn(OAc) 2 ·2H 2 O, Ln(NO 3 ) 3 ·6H 2 O (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, and Tb), and 4,4′-bipy (4,4′-bipyridine) or H 2 bdc (terephthalic acid), three new families of heteromultinuclear Zn II –Ln III complexes: [{Zn(L)Ln(NO 3 ) 3 (CH 3 OH)} 2 (4,4′-bipy)] (Ln = La ( 1 ·2CH 3 OH) and Ce ( 2 )), [{Zn(L)Ln(NO 3 ) 3 } 2 (4,4′-bipy)] (Ln = Pr ( 3 ), Nd ( 4 ), Sm ( 5 ), Eu ( 6 ), Gd ( 7 ), and Tb( 8 )), [{(ZnL) 2 Ln} 2 (bdc) 2 ]·(NO 3 ) 2 ·2CHCl 3 (Ln = Ce ( 9 ), Pr ( 10 ) and Sm ( 11 ·2CH 3 CH 2 OH)), and 2 ∞ [Zn(L)Ln(bdc) 1.5 ] (Ln = Eu ( 12 ) and Gd ( 13 ·2CHCl 3 )) were obtained, respectively. Complexes 1 – 8 are heterotetranuclear dimers based on [Zn(L)Ln] moieties which are linked through the exo -dentate 4,4′-bipy having nitrogen-donor atoms. Heterohexanuclear complexes 9 – 11 constructed from almost linear trinuclear cationic [(ZnL) 2 Ln] moieties which are linked through the exo -dentate (bdc) 2– bearing oxygen-donor atoms. Two 2D coordination polymers 12 and 13 are also assembled by [Zn(L)Ln] units with (bdc) 2– linker. Furthermore, the luminescence properties of complexes 1 – 13 have been studied. An appropriate and selective linker could enhance the construction of a Salamo-type zinc(II)–lanthanide(III) complex possessing efficient luminescent properties.