Thermogravimetric study of some new transition metal–schiff base coordination polymers

Horowitz, Emanuel; Tryon, Max; Christensen, Richard G.; Perros, Theodore P.

doi:10.1002/app.1965.070090701

Cited by 12 publications

(3 citation statements)

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“…In an earlier study (13,14,15), we examined the thermal behavior in vacuo of some Mn, Co, Ni, and Cu divalent, first-row transition metal coordination polymers, using the procedure previously described. These included coordination polymers containing the same transition metals but different derivatives of bis (8-hydroxyquinoline) so that the effect of the ligand on the thermal stability of these systems could also be judged.…”

Section: (Xi)mentioning

confidence: 99%

“…The weight loss of samples heated at a rate of 2.5°C./minute at 10" 3 to 10" 5 torr was automatically recorded as a function of temperature (13, 14,15), using thermogravimetric analysis. As has been pointed out (13), meaningful results of the effect of temperature on these systems can be obtained when the thermal process is separated from the oxidative process by operating in vacuo.…”

Section: Thermal Stabilitymentioning

confidence: 99%

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Metallo-organic Systems with High Thermal Stability

Horowitz¹

1968

Advances in Chemistry

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When 8-hydroxyquinoline and derivatives of bis(8-hydroxy--quinoline) react with metal ions, coordination complexes and polymers are formed, respectively, which exhibit improved thermal stability. This paper reviews the reaction of first--row transition metal ions with such ligands and their effect on the stabilization of these organic molecules. For the polymers containing divalent Mn, Co, Ni, Cu, or Zn the decomposition temperature is related to the periodic properties of the metal as well as the composition of the ligand to which the metal is coordinated. Trivalent chromium produces a crosslinked polymer when it reacts with bis(8-hydroxy-5-quinolyl)methane, and the thermogram for this polymer is also reported.

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Section: (Xi)mentioning

confidence: 99%

Section: Thermal Stabilitymentioning

confidence: 99%

Metallo-organic Systems with High Thermal Stability

Horowitz¹

1968

Advances in Chemistry

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“…E-mail: bhavna606@yahoo.co.in quinoline and terephthalaldehyde yielded a bis-functional Schiff base, which was used to produce coordination polymers containing transition metal ions [7]. Chelating ion exchange resins were also prepared by copolycondensation of 8-hydroxyquinoline or phenol derivatives like o-aminophenol, resorcylic acid or resorcinol with formaldehyde [8].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, charecterization and chelation ion-exchange studies of a resin copolymer derived from 8-hydroxyquinoline-formaldehyde-catechol

Shah

Bhandari

et al. 2008

JICS

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A chelating ion exchange resin was synthesized from 8-hydroxyquinoline and catechol using formaldehyde as a cross linking agent at 120 ± 2 ºC in DMF solution. The resin was characterized by FTIR and elemental analysis. The morphology of the synthesized resin was studied by optical photograph and scanning electron microscopy (SEM). Various kinetic parameters such as energy of activation (E a ), enthalpy of activation (H ‡ ), entropy of activation (S ‡ ), free energy of activation (G ‡ ), order of reaction (n) and pre-exponential factor (A) of various steps of thermal decomposition have been calculated from thermogravimertic results. The physico-chemical properties of the resin have been studied. The total cation exchange capacity was measured and effect of pH and metal ion concentration on ion exchange capacity were studied. The rate of cation exchange reactions and distribution coefficient values in tartaric acid media at different pH were also studied using batch equilibration method.

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Synthesis and properties of chelate polymers of Cu(II), Ni(II), Co(II), Mn(II) and Zn(II) with a schiff's base of 5,5′‐methylene‐bis(3,3′‐dinitrosalicylaldehyde) with 1,6‐hexanediamine

Patel

Sutaria

Patel

1996

Angew. Makromol. Chem.

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The synthesis, characterization and coordination aspects of the title polymer ligands are reported. The polymeric chelates were prepared by polycondensations of transition metal ions (M) with a poly(Schiff's base) (L). The analytical data propose a (ML), formula for the chelates. All the polychelates are stable and insoluble in common organic solvents. The geometry around the central metal ion in each chelate is proposed on the basis of measurements of magnetic susceptibilities and UV reflectance spectra. The ligand field splitting parameters 10 Dq, the interelectronic repulsion parameter B, the nephelauxetric parameter p and ligand field splitting energies (L. F. S. E.) have been calculated for Ni(I1) and Co(I1) chelates. All chelates are resistant to moderately concentrated acids and dilute alkalies at ambient temperature. They exhibit thermal stabilities to varying degrees. IR spectra show that the ligand usually coordinates via the carbonyl oxygen (C=O) and the phenolic OH with replacement of hydrogen by metal ions. ZUSAMMENFASSUNG:Es wird uber die Synthese, die Charakterisierung und die Koordinationseigenschaften der im Titel genannten Polymerliganden berichtet . Die polymeren Chelate wurden durch Polykondensation von Ubergangsmetallionen (M) mit polymeren Schiffschen Basen (L) hergestellt. Die Analysenergebnisse weisen auf eine Formel (ML), fur die Chelate hin. Die Polychelate sind stabil und unloslich in gebrauchlichen organischen Liisemitteln. Die geometrische Anordnung der Liganden um das zentrale Metallion wird auf der Basis von Messungen der magnetischen Suszeptibilitaten und UV-Reflexionsspektren beschrieben. Die Ligandenfeldaufspaltungsparameter 10 Dq, der interelektronische AbstoRungsparameter B, der nephelauxetrische Parameter und die Ligandenfeldaufspaltungsenergien wurden fur die Ni(I1)-und Co(I1)-Chelate berech-

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Thermogravimetric study of some new transition metal–schiff base coordination polymers

Cited by 12 publications

References 3 publications

Metallo-organic Systems with High Thermal Stability

Metallo-organic Systems with High Thermal Stability

Synthesis, charecterization and chelation ion-exchange studies of a resin copolymer derived from 8-hydroxyquinoline-formaldehyde-catechol

Synthesis and properties of chelate polymers of Cu(II), Ni(II), Co(II), Mn(II) and Zn(II) with a schiff's base of 5,5′‐methylene‐bis(3,3′‐dinitrosalicylaldehyde) with 1,6‐hexanediamine

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