Chelate polymers. III. New polyazomethines of 5,5′-methylene-bissalicylaldehyde with siloxane diamines and their divalent metal complexes

Maria Cazacu, Mihai Marcu, Angelica Vlad, A. Tóth, Carmen Racles

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Novel polymeric azomethines of 5,5′-methylene-bissalicylaldehyde with two siloxane diamines {H2N(CH2)3(CH3)2 SiO[(CH3)2SiO]m Si(CH3)2(CH2)3NH2, where m = 0 or 6.5} were obtained. Their structures were confirmed by elemental and spectral [IR, ultraviolet-visible (UV-vis), and 1H NMR] analysis. The obtained polyazomethines were converted into the chelates of some divalent metals (copper, cobalt, and nickel). The resulting complexes were characterized by electronic and IR spectral measurements, elemental analysis, and thermal studies. From IR and UV-vis studies, the phenolic oxygen and imine nitrogen of the ligand were found to be the coordination sites. The thermogravimetric data indicated that the chelates were less stable than the corresponding ligands and that the thermostability depended on the siloxane segment length and the nature of the metal. Both the macromolecular ligands and the parts of the resultant chelates were soluble in common organic solvents, such as CHCl3, CH2Cl2, dimethylformamide, and dimethyl sulfoxide. The surface compositions of the ligands and some chelates were examined by X-ray photoelectron spectroscopy.

Original languageEnglish
Pages (from-to)3169-3179
Number of pages11
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume41
Issue number20
DOIs
Publication statusPublished - Oct 15 2003

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Siloxanes
Diamines
Coordination Complexes
Metal complexes
Polymers
Ligands
Metals
Dimethylformamide
Imines
Dimethyl sulfoxide
Dimethyl Sulfoxide
Cobalt
Nickel
Surface structure
Organic solvents
Copper
Nitrogen
X ray photoelectron spectroscopy
Nuclear magnetic resonance
Oxygen

Keywords

  • Chelate polymers
  • ESCA/X-ray photoelectron spectroscopy (XPS)
  • Metal-polymer complexes
  • Polyazomethines
  • Polysiloxanes
  • Siloxane-containing ligands

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

Cite this

Chelate polymers. III. New polyazomethines of 5,5′-methylene-bissalicylaldehyde with siloxane diamines and their divalent metal complexes. / Cazacu, Maria; Marcu, Mihai; Vlad, Angelica; Tóth, A.; Racles, Carmen.

In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 41, No. 20, 15.10.2003, p. 3169-3179.

Research output: Contribution to journalArticle

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