Synthesis, characterization, fluorescence and catalytic activity of some new complexes of unsymmetrical Schiff base of 2-pyridinecarboxaldehyde with 2,6-diaminopyridine.
The Schiff base, 2-[(pyridin-2-ylmethylidene)amino]-6-aminopyridine (L) was synthesized by 1:1 condensation of 2-pyridinecarboxaldehyde and 2,6-diaminopyridine. The ligand and its complexes were characterized by different physicochemical studies. The analytical and spectroscopic tools indicated that the synthesized complexes have the general formulae: [M(L)Cl2]·2H2O (M=Cu(II), Ni(II) and Co(II)), [La(L)3](NO3)3·3H2O and [Sm(L)(ClO4)3]·3H2O. Vibrational spectra indicated the coordination of L to metal ions through its pyridyl and azomethine nitrogen atoms. The presence of water molecules in all reported complexes has been supported by TG/DTA studies. Kinetic and thermodynamic parameters were computed using Coats and Redfern method. The prepared ligand and its complexes exhibited intraligand (π-π∗) fluorescence and can potentially serve as photoactive materials. The catalytic activity of the complexes toward the decomposition of hydrogen peroxide was investigated. Both the ligand and its complexes have been screened for antibacterial activities.
Chemistry Department, Faculty of Women for Arts, Science and Education, Ain Shams University, Cairo, Egypt. Electronic address: omaymaahmed92@yahoo.com.
Omyma A M
OA
Ali
Chemistry Department, Faculty of Science, El-Fayoum University, El-Fayoum, Egypt.
Samir M
SM
El-Medani
Chemistry Department, Faculty of Women for Arts, Science and Education, Ain Shams University, Cairo, Egypt.
Doaa A
DA
Ahmed
Chemistry Department, Faculty of Women for Arts, Science and Education, Ain Shams University, Cairo, Egypt.
Doaa A
DA
Nassar
D000900:Anti-Bacterial Agents / Q000494:pharmacology; D002384:Catalysis; D004553:Electric Conductivity; D004583:Electrons; D004926:Escherichia coli / Q000187:drug effects; D006861:Hydrogen Peroxide / Q000737:chemistry; D007700:Kinetics; D008024:Ligands; D049449:Luminescence; D060328:Magnetic Phenomena; D013058:Mass Spectrometry; D008826:Microbial Sensitivity Tests; D066244:Proton Magnetic Resonance Spectroscopy; D011725:Pyridines / Q000737:chemistry*; D012545:Schiff Bases / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D013050:Spectrometry, Fluorescence; D013055:Spectrophotometry, Infrared; D013211:Staphylococcus aureus / Q000187:drug effects; D013816:Thermodynamics; D013818:Thermogravimetry
D000900:Anti-Bacterial Agents; D008024:Ligands; D011725:Pyridines; D012545:Schiff Bases; C522921:picolinaldehyde; D006861:Hydrogen Peroxide; C505797:2,6-diaminopyridine
2-Pyridinecarboxaldehyde; Catalytic activity; Fluorescence; Spectral