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 (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.
