Synthesis, Characterization, Fluorescence and Antibacterial Activities Studies of Transition Metals Complexes with a Macro Acyclic Schiff Base Ligand
Fatou Barr
Department of Chemistry, UFR SATIC, University Alioune DIOP, Bambey 21400, Senegal.
Ndèye Fatou Ndiaye
Department of Chemistry, UFR SATIC, University Alioune DIOP, Bambey 21400, Senegal.
Antoine Blaise Kama
Department of Chemistry, UFR SATIC, University Alioune DIOP, Bambey 21400, Senegal.
Farba Bouyagui Tamboura *
Department of Chemistry, UFR SATIC, University Alioune DIOP, Bambey 21400, Senegal.
Moussa Dieng
Department of Chemistry, UFR SATIC, University Alioune DIOP, Bambey 21400, Senegal.
Rianatou Bada Alambedji
Laboratory of Microbiology, Immunology and Infectious Pathology of Dakar, Senegal.
Ibrahima Elhadji Thiam
Department of Chemistry, University Cheikh Anta Diop, Dakar 10700, Senegal.
Aliou Hamady Barry
Unité de Recherche en Chimie des Matériaux, Department of Chemistry, Faculty of Sciences and Technics, University of Nouakchott, Mauritania.
Nicolas Claiser
Laboratory CRM2, UMR CNRS 7036, Institut Jean Barriol, University of Lorraine, 54506, Vandœuvre-lès-Nancy, France.
Mohamed Souhassou
Laboratory CRM2, UMR CNRS 7036, Institut Jean Barriol, University of Lorraine, 54506, Vandœuvre-lès-Nancy, France.
Mohamed Lamine Gaye
Department of Chemistry, University Cheikh Anta Diop, Dakar 10700, Senegal.
*Author to whom correspondence should be addressed.
Abstract
The reactions of the Schiff base 2,2’-[(2-hydroxypropane-1,3-diyl) bis-(imino-methane diyl)] bis-(4-bromophenol) (H3L), with metal transition ions (Mn(II), Ni(II), Cu(II), Zn(II), and Cd(II),) afforded one type of complex formulated as [M(HL)(H2O)2].nH2O. These compounds have been characterized by elemental analysis, UV–Vis, FTIR, 1H and 13C NMR spectroscopies, molar conductivity and room temperature magnetic measurements. The structure of nickel (II) complex has been determined by X-ray crystallography. The complex crystallizes in the orthorhombic space group Pnma with a = 7.7702(4) Å, b = 23.1921(15) Å, c = 10.6853(5) Å, V = 1925.57(15) Å3, Z = 8, R1 = 0.043 and wR2 = 0.107, Dcalc = 1.893 Mg m−3. The ligand acts in tetradentate fashion in its di-deprotonated form. Two coordinated water molecules complete the coordination sphere. The environment around the Ni(II) center is best described as an octahedral geometry. In the crystal structure of the Schiff base ligand, the existence of a strong intramolecular O-H•••O hydrogen bonding [O2W-H2W 0.80(3) Å, H2W •••O1 1.915(3) Å, O2W••• O1 2.6258(19) Å, O2W-H2W•••O1 148(3)°] and [O1W-H1W 0.73(3), H1W•••O1 2.15(4) Å, O1W•••O1 2.836(2)Å, O1W-H1W•••O1 156(4)°] are observed. Antibacterial activity study shows that the cadmium (II) complex is more active than the free ligand on.
Keywords: Schiff base, antibacterial activity, metal complex, FTIR, magnetic, X-ray diffraction