Synthesis, characterization, fluorescence and catalytic activity of some new complexes of unsymmetrical Schiff base of 2-pyridinecarboxaldehyde with 2,6-diaminopyridine
Doaa A Ahmed; Samir M.El-Medani; Doaa A.Nassar; Omym A.M. Ali;
Abstract
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.
Other data
Title | Synthesis, characterization, fluorescence and catalytic activity of some new complexes of unsymmetrical Schiff base of 2-pyridinecarboxaldehyde with 2,6-diaminopyridine | Authors | Doaa A Ahmed ; Samir M.El-Medani; Doaa A.Nassar; Omym A.M. Ali | Keywords | 2-Pyridinecarboxaldehyde;Catalytic activity;Fluorescence;Spectral | Issue Date | 5-Jun-2015 | Publisher | PERGAMON-ELSEVIER SCIENCE LTD | Journal | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | Volume | 144 | Issue | 5 | Start page | 99 | End page | 106 | ISSN | 13861425 | DOI | 10.1016/j.saa.2015.02.078 | PubMed ID | 25748987 | Scopus ID | 2-s2.0-84929310024 | Web of science ID | WOS:000352668100013 |
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