Synthesis and Spectroscopic Investigations of CuSO₄ · 5H₂O Doped Poly (m-Toluidine)

Abstract

Poly (m-toluidine) has been synthesized by chemical oxidative polymerization in acidic medium. Poly (m-toluidine) so obtained has been doped with copper sulfate in different concentration and prepared samples have been characterized by UV-visible spectroscopy, FTIR spectroscopy, X-ray diffraction, and DC conductivity measurements. UV-visible study reveals that optical band gap decreases considerably with increase in dopant concentration. The FTIR spectra exhibit structural changes in the backbone of poly (m-toluidine) with doping. The XRD patterns demonstrate the amorphous nature of the samples. It is observed that DC conductivity increases with increase in temperature showing the organic semiconducting nature of doped poly (m-toluidine).

Keywords:

• Band gap
• chemical doping
• DC conductivity
• FTIR
• poly (m-toluidine)
• UV-visible
• XRD

Acknowledgement

The authors are thankful to Panjab University, Chandigarh, for providing UV-visible spectroscopy, FTIR spectroscopy, and X-ray diffraction facilities; and Jamia Millia Islamia, New Delhi, for providing facilities for DC conductivity measurements.