Synthesis, characterization, ion-exchange and antimicrobial study of poly[(2-hydroxy-4-butoxy benzophenone)ethylene] resin and its polychelates with lanthanides

Abstract

The polymeric ligand (resin) was prepared from 2-hydroxy-4-butoxy benzophenone with ethane diol with polyphosphoric acid as catalyst on constant heating at 160°C for 13 h. The poly[(2-hydroxy-4-butoxy benzophenone)ethylene] (HBBP-ED) forms 1 : 2 metal : ligand polychelates with 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, magnetic susceptibilities, IR-spectroscopy, NMR and thermogravimetric analyses. The molecular weight was determined using number average molecular weight (M n) by a vapor pressure osmometry (VPO) method. All the polychelates are paramagnetic except La(III). Ion-exchange studies at different electrolyte concentrations, pH and rate have been carried out for the lanthanide ions. The resin can be used as an ion-exchanger and antimicrobial agent.

Keywords:

• Poly[(2-hydroxy-4-butoxy benzophenone)ethylene]
• Lanthanide(III) polychelates
• Thermal study
• Ion-exchange
• Antimicrobial study

Acknowledgement

The authors thank the Head of the Department of Chemistry and Bioscience, Sardar Patel University, Vallabh Vidyanagar, for providing laboratory facilities.