1. a Department of Chemistry, Sri Krishnadevaraya University, Anantapur, India;, Email: swamyphd@gmail.com
2. b Department of Chemistry, Sri Krishnadevaraya University, Anantapur, India
3. c Department of Polymer Science & Technology, Sri Krishnadevaraya University, Anantapur, India
4. d Department of Chemistry, Sri Krishnadevaraya University, Anantapur, India
5. e Department of Polymer Science & Technology, Sri Krishnadevaraya University, Anantapur, India