Poly[(2-Hydroxy-4-Methoxy Benzophenone) Butylene] Resin and its Polychelates with Lanthanides(III): Synthesis and Characterization

Abstract

The resin (polymeric ligand) was prepared from 2-hydroxy-4-methoxy benzophenone with 1,4-butane diol in the presence of polyphosphoric acid as a catalyst at 160 C for 9 h. The poly[(2-hydroxy-4-methoxy benzophenone) butylene] L ¼ H(HMBP-BD) form 1:2, ML 2 , complexes with M ¼ La(III), Pr(III), Nd(III), Sm(III), Gd(III), Tb(III), and Dy(III). The polymeric ligand and its polychelates were characterized by elemental analyses, electronic spectra, and magnetic susceptibilities, IR-spectroscopy, NMR, and thermogravimetric analyses. The number average molecular weight (Mn) of the resin was determined by Vapour Pressure Osmometry (VPO). All the polychelates are paramagnetic in nature. The resins and their polychelates were screened for their antimicrobial activity against E. coli, B. substilis, S. aureus (bacteria), and S. cerevisiae (yeast). It was found that the polychelates show good antimicrobial activity compared to the free polymeric ligand.

Corchorusolitoriuswaste(mulukiya) as a potential sorbent for the removal of cadmium (II) andthorium (IV) ions: kinetics, equilibrium study and image analysis

“…The metal removal mechanism is related to the initial metal ion concentration. Adsorption of metal ions takes place at definite sites only when the metal ion concentration is low, but as the concentration is increased, the sites become saturated and exchange sites are filled (Patel et al, 2007).The maximum amount of Cd(II) and Th(IV) ions was adsorbed within the first 30 min (80-90% of total metal ions adsorbed) and thereafter the adsorption proceeded at a slower rate until equilibrium reached. The equilibrium time was found to be at 120 min for the initial concentration range studied.…”