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

Abstract

Using 3-MeOsalamo H2L (H2L = 1,2-bis(3-methoxysalicylideneaminooxy)ethane) with Zn(OAc)2·2H2O, Ln(NO3)3·6H2O (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, and Tb), and 4,4′-bipy (4,4′-bipyridine) or H2bdc (terephthalic acid), three new families of heteromultinuclear ZnII–LnIII complexes: [{Zn(L)Ln(NO3)3(CH3OH)}2(4,4′-bipy)] (Ln = La (1·2CH3OH) and Ce (2)), [{Zn(L)Ln(NO3)3}2(4,4′-bipy)] (Ln = Pr (3), Nd (4), Sm (5), Eu (6), Gd (7), and Tb(8)), [{(ZnL)2Ln}2(bdc)2]·(NO3)2·2CHCl3 (Ln = Ce (9), Pr (10) and Sm (11·2CH3CH2OH)), and 2∞[Zn(L)Ln(bdc)1.5] (Ln = Eu (12) and Gd (13·2CHCl3)) 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)2Ln] 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 (bd...