Synthesis and characterization of a new piperazine containing macroacyclic ligand and its Cu(ii) and Co(ii) complexes: An investigation of the ligand's silver specific fluorescent properties

Theoretical and solid-state structures of three new macroacyclic Schiff base complexes and the investigation of their anticancer, antioxidant and antibacterial properties

“…The structure of [CoL] is almost identical to those found for [2,2'-{(piperazine-1,4-diyl)bis[(2,1-phenylene)(azanylylidene)methanylylidene]}bis(6-methoxyphenolato)]-cobalt( ii ) [CoL 1 ], 44 and [2,2'-{(piperazine-1,4-diyl)bis[(2,1-phenylene)(azanylylidene)methanylylidene]}bis(4-nitrophenolato)]-cobalt( ii ) [CoL 2 ] 45 cobalt complexes of the hexadentate ligand that have either methoxy groups or nitro groups, respectively, attached to the phenol rings. In the present compound the cobalt atom lies on a 2-fold axis, so that the asymmetric unit comprises half the molecule.…”

“…In this complex, the cobalt is in a distorted trigonal prismatic coordination environment, surrounded by the six donor atoms of the deprotonated hexadentate ligand, similar to the other complexes with the ligands containing methoxy or nitro substitutents on the phenol rings. 44,45 The geometries of [ML] (M = Co, Ni and Cu) complexes were fully optimized using the B3lyp and BP86 levels of theory with def2-TZVP basis set. The results show that the CoL complex studied here has the distorted trigonal-prismatic geometry, similar to Xray crystal structure of its complex, and Ni (CuL) illustrated its greater toxicity properties than other complexes.…”

a Versatile Schiff Base Chemosensor for the Determination of Trace Co2+, Ni2+, Cu2+, and Zn2+ in the Water and Its Bioimaging Applications

“…As is known to all, doubly charged metal ions such as Co 2+ , Ni 2+ , Cu 2+ , and Zn 2+ play important roles in the environment and biologic processes, especially in maintaining human nutrition and health . For instance, an excess of Co 2+ could lead to vasodilatation and cardiomyopathy, , Similarly, an overload of Ni 2+ would result in asthma, angina, or other cardiac symptoms . Daily intake of Cu 2+ and Zn 2+ is required to remain healthy .…”