Abstract:

The polymeric ligand (resin) was prepared from 2,4-dihydroxy benzophenone with 1,4-butane diol in presence of polyphosphoric acid as a catalyst at   160° C for 13 hrs.. The poly [(2,4-dihydroxy benzophenone) 1,4-butylene ] i.e. H(DHBP-1,4-BD) forms, 1:2 metal: ligand chelates with La(III), Pr(III), Nd(III), Sm(III),Gd(III), Tb(III), and Dy(III). The polymeric ligand and its polychelates were characterized on the basis of elemental analyses, electronic spectra, magnetic susceptibilities, thermogravimetric analysis, NMR and IR results. The molecular weight was determined using number average molecular weight ( ) by the vapour pressure osmometry (VPO) method. All the polychelates are paramagnetic in nature except La(III). The resin and their polychelates were tested for antimicrobial activity against E. coli, B. substilis, and S. aureus (bacteria) and S. cerevisiae (yeast). It is found that the synthesized polychelates can be used as an effective and efficient antibacterial agents.

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