Zinc(II) and Nickel(II) Complexes Based on Schiff Base Ligands: Synthesis, Crystal Structure, Luminescent and Magnetic Properties

Abstract

Three new phenolate oxygen bridged transition metal complexes [Zn3(HL1)3(μ3‐CH3O)]·(ClO4)2(H2O)3 (1), [Ni2(HL1)2(μ1,1‐N3)(o‐vanillin)]·H2O (2), [Ni3(HL2)2(PhCOO)2(PhCOOH)2(EtOH)2] (3) have been synthesized by metal ions and potentially multidentate Schiff base ligands (H2L1 = 2‐((1‐hydroxy‐2‐methylpropan‐2‐ylimino) methyl)‐6‐methoxyphenol; H3L2 = (E)‐1‐((2‐hydroxy‐3‐methoxy‐benzylidene)amino)ethane‐1,2‐diol). All the three complexes 1, 2, and 3 have been characterized by elemental analysis, FT‐IR spectroscopy, and single‐crystal X‐ray diffraction studies. Crystal structures reveal that complex 1 is a trinuclear incomplete cubane‐like zinc cluster whereas complex 2 is a dinuclear nickel complex bridged by azide, and compound 3 is a trinuclear nickel complex. The luminescent property for complex 1 and magnetic behaviors for complexes 2 and 3 have been investigated.

Search for Structurally Resembled Mn/Ca Cubane Core of the Oxygen Evolving Complex of Photosystem II Yielded MnIV, MnIII3MnII and MnIII2CaII2Entities: Structure and Magnetism

“…Previously, the amine [(�)-3-Aminopropane-1,2-diol] is used for the synthesis of several homo-and heterometallic Cu II 2 , [38] Cu II 4 , [39,40] Ni II 3 , [41] Ni II 4 , [38,39] Co II 4 , [40] Zn II 4 , [40] Mn III 4 Mn II , [39] Mn III 3 Mn II Na, [42,43] Fe III 7 , [44] Mn III 3 Ca II Na, [45] Zn II 5 Na 2 , [46] cluster compounds.…”

Investigation on Antimicrobial Activity of Nickel(II) and Zinc(II) Complexes with Schiff Base Derived from Aminoacid Valine With Citral Synthesis, Spectroscopic Analysis

“…Based on spectral assignments, the structures of the complexes are proposed as bridged geometrical arrangement (1a) and monomeric geometrical arrangement (1b). Hence bridged geometric structure arrangement of 1a complex might be the reason for the enhanced antimicrobial activity, and the low activity of 1b complex might be owing to low lipophilicity behavior i.e., the 1b complex is not well enough to penetrate through the outer membrane layer over the cells of the screened microorganisms [12], [13], [14], [15] [16].…”

Mono- and di-nuclear nickel(ii) complexes derived from NNO donor ligands: syntheses, crystal structures and magnetic studies of dinuclear analogues

“…These three governing structural parameters of the m-alkoxido/phenoxido-m-azide nickel(II) systems along with their exchange integrals are listed in Table 5. 15,[55][56][57] Of them, it is clear from the magneto-structural correlation table that the parameters relevant to the azide bridging are the key factor governing the sign and strength of the magnetic interaction between two metal centres. In fact, all the reported malkoxido/phenoxido-m-azide nickel(II) compounds exhibit ferromagnetic interaction.…”