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The design and preparation of transition‐metal complexes with Schiff base ligands are of interest due to their potential applications in the fields of molecular magnetism, nonlinear optics, dye‐sensitized solar cells (DSSCs), sensing and photoluminescence. Luminescent metal complexes have been suggested as potential phosphors in electroluminescent devices. A new luminescent nickel(II) complex, [Ni(C10H10Cl2NO2)2], has been synthesized and characterized by single‐crystal X‐ray diffraction and elemental analysis, UV–Vis, FT–IR, 1H NMR, 13C NMR and photoluminescence spectroscopies, and LC–MS/MS. Molecules of the complex in the crystals lie on special positions, on crystallographic binary rotation axes. The NiII atoms are six‐coordinated by two phenolate O, two imine N and two hydroxy O atoms from two tridentate Schiff base 2,4‐dichloro‐6‐[(2‐hydroxypropyl)iminomethyl]phenolate ligands, forming an elongated octahedral geometry. Furthermore, the complex exhibits a strong green luminescence emission in the solid state at room temperature, as can be seen from the (CIE) chromaticity diagram, and hence the complex may be a promising green OLED (organic light‐emitting diode) in the development of electroluminescent materials for flat‐panel‐display applications. [ABSTRACT FROM AUTHOR]

A new linear trinuclear MnIII-MnII-MnIIIcomplex1has been synthesized and characterized by elemental, spectral, X-ray and magnetic analysis. X-ray diffraction studies show that the central MnIIion is located at a crystallographic inversion center and is triply bridged to the terminal MnIIIions through one methoxide, one syn-syn carboxylate and one hydroxyl oxygen bridges with the short MnIII…MnIIdistance that is 3.047 Å. The intermolecular C-H…O, C-H…π and ring-metal interactions are observed in the hydrogen-bonded assembly of1. Magnetic studies reveal that the mixed-valence complex1hasS= 3/2 ground state with antiferromagnetic exchange interactions between MnIIand MnIIIions. [ABSTRACT FROM AUTHOR]