Synthesis and characterization of new macrocyclic Schiff base derived from 2,6-diaminopyridine and 1,7-bis(2-formylphenyl)-1,4,7-trioxaheptane and its Cu(II), Ni(II), Pb(II), Co(III) and La(III) complexes

Salih Ilhan, Hamdi Temel*, Ismail Yilmaz, Memet Şekerci

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

75 Citations (Scopus)

Abstract

A new macrocyclic ligand, 1,3,5-triaza-2,4:7,8:16,17-tribenzo-9,12,15-trioxacyclooktadeca-1,5-dien (L) was synthesized by reaction of 2,6-diaminopyridine and 1,7-bis(2-formylphenyl)-1,4,7-trioxaheptane. Then, its Cu(II), Ni(II), Pb(II), Co(III) and La(III) complexes were synthesized by template effect by reaction of 2,6-diaminopyridine and 1,7-bis(2-formylphenyl)-1,4,7-trioxaheptane and Cu(NO3)2 · 3H2O, Ni(NO3)2 · 6H2O, Pb(NO3)2, Co(NO3)2 · 6H2O, La(NO3)3 · 6H2O, respectively. The ligand and its metal complexes have been characterized by elemental analysis, IR, 1H and 13C NMR, UV-Vis spectra, magnetic susceptibility, thermal gravimetric analysis, conductivity measurements, mass spectra and cyclic voltammetry. All complexes are diamagnetic and Cu(II) complex is binuclear. The Co(II) was oxidized to Co(III). The comparative electrochemical studies show that the nickel complex exhibited a quasi-reversible one-electron reduction process while copper and cobalt complexes gave irreversible reduction processes in DMSO solution.

Original languageEnglish
Pages (from-to)2795-2802
Number of pages8
JournalPolyhedron
Volume26
Issue number12
DOIs
Publication statusPublished - 23 Jul 2007

Funding

We are grateful to Dicle University Research Found (DUAPK-03-EF-24) for the support of this research.

FundersFunder number
Dicle University Research FoundDUAPK-03-EF-24

    Keywords

    • 2,6-Diaminopyridine and 1,7-bis(2-formylphenyl)-1,4,7-trioxaheptane
    • Macrocyclic Schiff base
    • Macrocyclic Schiff base complexes

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