Synthesis and characterization of self-assembled coordination polymers of N-diaminomethylene-4-(3-formyl-4-hydroxy-phenylazo)-benzenesulfonamide

Hoda El-Ghamry, Ken Sakai, Shigeyuki Masaoka, Kamal El-Baradie, Raafat Issa

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Abstract

The azo dye ligandN-diaminomethylene-4-(3-formyl-4-hydroxy-phenylazo)- benzenesulfonamide (HL) and Cu(II), Co(II), and Mn(II) coordination polymers were synthesized in addition to a non-polymeric Pd(II) complex. In all complexes, the ligand bonds to the metal ion through the formyl and α-hydroxy oxygen atoms. The sulfonamide oxygen also coordinates to the metal. The complexes are formulated as [ML 2] n, whereM=Cu(II), Co(II), and Mn(II), and [ML(Cl)(H 2O)], whereM=Pd(II). On the basis of spectral studies and magnetic susceptibility measurements, an octahedral geometry was assigned to Co(II) and Mn(II) complexes, tetragonally elongated octahedral geometry for Cu(II) complex, while the Pd(II) complex was found to be square planar. Crystallization of Cu(II) complex from DMF afforded single crystals of general formula {[Cu(L) 2] · 3DMF} n (2). X-ray structural analysis of 2 revealed that each Cu(II) adopts elongated octahedral geometry affording 1-D chains. The chains are connected by hydrogen bonds, resulting in the formation of 2-D supramolecular assemblies. The crystal structure of HL has also been determined and discussed. Cyclic voltammetric behavior of the ligand and some complexes are also discussed.

Original languageEnglish
Pages (from-to)780-794
Number of pages15
JournalJournal of Coordination Chemistry
Volume65
Issue number5
DOIs
Publication statusPublished - Jun 18 2012

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coordination polymers
Polymers
Geometry
synthesis
Azo Compounds
geometry
Ligands
Oxygen
magnetic permeability
ligands
Azo dyes
Sulfonamides
Crystallization
Magnetic susceptibility
structural analysis
Structural analysis
assemblies
Metal ions
oxygen atoms
metal ions

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Synthesis and characterization of self-assembled coordination polymers of N-diaminomethylene-4-(3-formyl-4-hydroxy-phenylazo)-benzenesulfonamide. / El-Ghamry, Hoda; Sakai, Ken; Masaoka, Shigeyuki; El-Baradie, Kamal; Issa, Raafat.

In: Journal of Coordination Chemistry, Vol. 65, No. 5, 18.06.2012, p. 780-794.

Research output: Contribution to journalArticle

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