Chelate polymers: II. Some novel transition metals complexes with azomethine‐containing siloxanes and their polyesters

Marcu, Mihai; Cazacu, Maria; Vlad, Angelica; Racleş, Carmen

doi:10.1002/aoc.486

Cited by 32 publications

(22 citation statements)

References 27 publications

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“…12,13 The strong signal at 1.2-1.3 ppm assigned to NH 2 protons of AP 0 disappeared due to the transformation of the primary amine group into an azomethine group.…”

Section: Materials Nanoscience and Catalysismentioning

confidence: 99%

Chelate polymers. IV. siloxanes functionalized with chelating groups derived from hydroxy-ketones, their metal complexes and some polymers

Vasiliu¹,

Cazacu²,

Marcu³

et al. 2005

Appl. Organometal. Chem.

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New ligands were obtained by the reaction of 1,3-bis(3-aminopropyl)tetramethyldisiloxane, with acetylacetone, 2,4-dihydroxybenzophenone and 2,4-dihydroxyacetophenone. The structures were confirmed by electronic, IR and 1 H NMR spectroscopy and elemental analysis. The change of the refractive index of the siloxanes by their chemical modification was also examined. These compounds were used for coordination of some divalent metals. The ligands and their metal complexes were both soluble in common solvents, such as CHCl 3 , dimethylformamide, dimethylsulfoxide, N-methyl-2-pyrrolidone. Some of the bifunctional chelates were inserted into polymeric structures by polycondensation with the diacid chloride of bis(p-carboxyphenyl)diphenylsilane.

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“…12,13 The strong signal at 1.2-1.3 ppm assigned to NH 2 protons of AP 0 disappeared due to the transformation of the primary amine group into an azomethine group.…”

Section: Materials Nanoscience and Catalysismentioning

confidence: 99%

Chelate polymers. IV. siloxanes functionalized with chelating groups derived from hydroxy-ketones, their metal complexes and some polymers

Vasiliu¹,

Cazacu²,

Marcu³

et al. 2005

Appl. Organometal. Chem.

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“…The incorporation of metal ions in the polymeric backbone is not only affecting their physical properties but also alters chemical properties of the polymer. 7 Previously a number of metal-chelated polymers with Schiff base complexes, 8 crown ether complexes, 9 and ferrocene complexes 10 have been prepared and reported. These polymers are widely being used in semiconductor devices 11 and in the field of nanotechnology.…”

Section: Introductionmentioning

confidence: 99%

Synthetic, spectroscopic, magnetic, thermal, and antimicrobial approach towards new biocidal coordination polymers

Nishat

Hasnain

Manisha

et al. 2011

J of Applied Polymer Sci

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O-aminophenol was reacted with glutraldehyde to obtain Schiff base, which was then reacted with formaldehyde in slight acidic medium to generate phenolic groups. Now the substituted Schiff base was reacted with the transition metal acetates of Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) to get polymeric metal complexes. Their structures have been elucidated on the basis of elemental analyses, 1 H NMR spectra, 13 C NMR spectra, magnetic measurements, thermogravimetric analyses, electronic spectra, and infrared spectra. The results are in accordance with an octahedral environment around the central metal ion. The polychelates of Mn(II), Co(II), Ni(II), and Cu(II) are paramagnetic while Zn(II) polychelate was found to be diamagnetic. The synthesized Schiff base acted as a uninegative bidentate ligand and bonding occurs through the hydroxyl oxygen and nitrogen atoms. The thermal behavior of these coordinating polymers was studied by TGA in nitrogen atmosphere up to the temperature range of 800 C. All the synthesized polychelates were also screened for their biocidal activity against Escherichia coli, Staphylococcus aureus, Bacillus subtilis (bacteria), Candida albicans, and Muller species (yeast) by using agar well diffusion method. All the metal polychelates show promising antimicrobial activities.

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“…Like other thermoset resins, epoxy resins can be rendered thermally retardant either by the incorporation of metal complexes or by the polymerization of reactive monomeric metal complexes. A large number of metal complexes possess antimicrobial activity, 15 so the polymers containing metal complexes may also possess antimicrobial activity and may be used as biocidials as well as antifouling coating materials. The epoxy group also seems to have strong antimicrobial activity.…”

Section: Introductionmentioning

confidence: 99%

New antimicrobial epoxy‐resin‐bearing Schiff‐base metal complexes

Ahamad

Nishat

2007

J of Applied Polymer Sci

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New epoxy resins, ER 1 -M(II) and ER 2 -M(II) (molar ratio of epichlorohydrin), bearing Schiff-base metal complexes were prepared by the condensation of epichlorohydrin with Schiff-base metal complexes (L 2 M, azomethine metal complexes) in 2 : 1 and 1.25 : 1 molar ratios, respectively, in an alkaline medium. The synthesized epoxy resins were characterized by various instrumental techniques, such as analytical, spectral, and thermal analysis. The epoxide equivalent weight (g/equiv) and epoxy value (equiv/100 g) of the synthesized epoxy resins were measured by standard procedures. The results of thermogravimetric analysis ascribed that ER 2 -M(II) showed better heat-resistance properties than ER 1 -M(II) epoxy resin.The glass-transition temperatures of all of the synthesized polymers were in the range 153-2308C. The antimicrobial activities of these resins were screened against some bacteria and against some yeast with an agar well diffusion method. All of the synthesized resins showed promising antimicrobial activities. Cu(II)-chelated resin showed wider effective antibacterial and antifungal activities than the other resins because of a higher stability constant.

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Chelate polymers: II. Some novel transition metals complexes with azomethine‐containing siloxanes and their polyesters

Cited by 32 publications

References 27 publications

Chelate polymers. IV. siloxanes functionalized with chelating groups derived from hydroxy-ketones, their metal complexes and some polymers

Chelate polymers. IV. siloxanes functionalized with chelating groups derived from hydroxy-ketones, their metal complexes and some polymers

Synthetic, spectroscopic, magnetic, thermal, and antimicrobial approach towards new biocidal coordination polymers

New antimicrobial epoxy‐resin‐bearing Schiff‐base metal complexes

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