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Paper Information

Journal:   IRANIAN POLYMER JOURNAL (ENGLISH)   MARCH 2006 , Volume 15 , Number 3 (69); Page(s) 219 To 226.
 
Paper: 

SYNTHESIS, CHARACTERIZATION AND ION-EXCHANGE STUDY OF POLY[(2,4-DIHYDROXY BENZOPHENONE) BUTYLENE] RESIN AND ITS POLYCHELATES WITH TRANSITION METALS

 
 
Author(s):  JOSHI J.D.*, PATEL N.B., PATEL S.D.
 
* Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar-388 120, Gujarat, India
 
Abstract: 
The polymeric ligand poly[(2,4-dihydroxy benzophenone)butylene] H(DHBP-BD) forms 1:2 metal-ligand complexes with Ni(II), Co(II), Cu(II) 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 (Mn) by vapour pressure osmometry (VPO) method. The stereochemistry in case of the Cu(II) polychelate is square-planar, tetrahedral for Zn(II) and octahedral for Ni(II) 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(II) 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(III) and UO2 2+(VI)] at varying electrolyte concentration, pH and time. It is found that, resin can be used as an ion-exchanger.
 
Keyword(s): RESIN, POLYCHELATES, THERMAL STUDY, ION-EXCHANGE, TRANSITION METALS
 
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