4936-79-2Relevant academic research and scientific papers
Ferromagnetic interactions in new double end-on-azide-bridged dinuclear Ni(II) complex: Synthesis, crystal structures, magnetic and photoluminescence properties
Donmez, Adem,Oylumluoglu, Gorkem,Coban, M. Burak,Kocak, Cagdas,Aygun, Muhittin,Kara, Hulya
, p. 569 - 575 (2017)
A new double end-on azide-bridged dinuclear nickel(II) Schiff base complex, [Ni2(μ1,1-N3)2(HL)2(MeOH)2], [HL = 2–[(2–hydroxypropylimino)methyl)–3,5–chlorophenol] has been synthesized and characterized by elemental analysis, UV and IR spectroscopy, single crystal X-ray diffraction, magnetic and photoluminescence study. The asymmetric unit contains half of the dinuclear unit. The Ni(HL) units in each dinuclear molecule are connected to each other by two bridging end-on azide ligands. In the crystalline architecture of the Ni(II) complex, intermolecular O–H?N hydrogen bonds link the molecules which form one-dimensional structure. Additionally, low temperature magnetic measurements indicate a dominant intradimer ferromagnetic interactions in double end-on azide-bridged dinuclear Ni(II) complex. Room temperature solid state photoluminescence measurements of Ni(II) complex show strong green emission band at λmax = 508 nm while its free ligand H2L shows broad yellow emission band at λmax = 594 nm. The luminescent performances making Ni(II) complex may be good candidates for potential luminescence materials.
Structural and spectroscopic characterization of a new luminescent NiII complex: bis{2,4-dichloro-6-[(2-hydroxypropyl)iminomethyl]phenolato-k3O,N,O′}nickel(II)
Kara, Duygu Akin,Donmez, Adem,Kara, Hulya,Burak Coban
, p. 901 - 906 (2018)
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.
Degradation of β-O-4 model lignin species by vanadium Schiff-base catalysts: Influence of catalyst structure and reaction conditions on activity and selectivity
Parker, Heather J.,Chuck, Christopher J.,Woodman, Timothy,Jones, Matthew D.
, p. 40 - 47 (2016/05/10)
In the pursuit of value-added products from the degradation of the abundant aromatic biopolymer lignin, homogeneous catalysis has the potential to provide a mild, selective route to monomeric phenols. Homogeneous vanadium catalysts have previously been shown to effectively cleave dimeric β-O-4 model lignin compounds, with selectivity for C-C or C-O cleavage, or benzylic oxidation, depending on the ligand structure and oxidation state of the metal. In this study, a systematic kinetic investigation was undertaken in order to gain further understanding of the role of ligand structure and reaction conditions on the activity of vanadium Schiff-base catalysts towards a non-phenolic β-O-4 model lignin dimer, and the selectivity of these species towards C-O bond cleavage. Catalytic activity was found to be increased by the addition of bulky, alkyl substituents at the 3′-position of the phenolate ring, whereas electron-withdrawing substituents were found to dramatically reduce activity irrespective of their size. Selective depolymerization of a phenolic β-O-4 dimer was also achieved.
Oxovanadium(IV) complexes of Schiff base derived from 3-aminopropanol and derivatives of salicylaldehyde
Sarkar, Asit R.,Chakraborty, Aniruddha
experimental part, p. 167 - 170 (2009/05/26)
Oxovanadium(IV) complexes were synthsised by reacting vanadyl acetylacetonate with Schiff bases obtained by condensation of 3-aminopropanol with salicylaldehyde and its derivatives, 3-methoxysalicylaldehyde, 5-nitrosalicylaldehyde, 5-chlorosalicylaldehyde
