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 (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.

Crystal structure of bis{5-(N,N′-diethylamine)-5′-methoxy -2,2′-[ethylenediyldioxybis(nitrilomethylidyne)]diphenolato}-bis(μ2-acetato-κ2 O:O′)trizinc(II), C46H56Zn3N6O14

“…They are able to form different types of metal complexes [6][7][8][9]. These compounds can be applied to the biological system [10], used as luminescence materials [11][12][13] and supramolecular building units [14][15][16][17].…”

Crystal structure of (E)-1-(4-(((E)-4-(diethylamino)-2-hydroxybenzylidene)amino)phenyl)ethan-1-one oxime, C19H23N3O2

“…Recently particular attention has been paid to the synthesis [5][6][7]. The application of oxime-type compounds and their complexes, for instance: they have been used to identify metal ions [8,9], have fascinating magnetic properties [10], many other fields of materials sciences [11][12][13][14][15][16][17] materials. All bond lengths are in normal ranges [18].…”

Synthesis and crystal structure of bis(μ2-acetato-κ2 O:O′)-bis{μ2-4-chloro-2-(8-(4-(diethylamino)-2-oxidophenyl)-3,6-dioxa-2,7-diazaocta-1,7-dien-1-yl)phenolato-κ6 O:O,N,N′,O′:O′}trizinc(II), C44H49Cl2N6O12Zn3

“…New research fields are the use of such complexes in a very wide and diversified subjects such as, optical and magnetic materials [5][6][7][8][9][10] and supramolecular architectures [11][12][13][14][15][16].…”