عنوان به زبان ديگر :
Synthesis, Characterization and lonexchange Study of Poly[(2,4-dihydroxy benzophenone)butylene] Resin and its Polychelates with Transition Metals
چكيده لاتين :
The polymeric ligand poly[(2,4-dihydroxy benzophenone)butylene] H(DHBP-BD) forms 1:2 metal-ligand complexes with Ni(II), Co(II), Cu(ll) and Zn(II). The polymeric
ligand and its polychelates were characterized on the basis of elemental analyses,
magnetic susceptibilities, IR-spectroscopy, UV-visible spectra, NMR, thermogravimetric
analyses. The molecular weight of resin was determined using number average molecular weight (M) by vapour pressure osmometry (VPO) method. The stereochemn
istry in case of the Cu(ll) polychelate is square-planar, tetrahedral for Zn(lI) and octahedral
for Ni(ll) and Co(II). The stereochemistry in each chelate is proposed on the basis of magnetic susceptibilities and electronic spectra. The IR spectra show that the bidentate ligand coordinates through the oxygen atom of the carbonyl and phenolic group with replacement of hydrogen by metal ions, respectively. All the chelates are paramagnetic in nature except the Zn(ll) chelate which is diamagnetic. The ion-exchange study of the prepared resin was checked by batch equilibration method with selected metal ions [Cu(II), Ni(II), Fe(lll) and UOl+(VI)] at varying electrolyte concentration, pH and time. It is found that, resin can be used as an ion-exchanger.
