[1] Sao Paulo State Univ UNESP, Dept Nat Resources, Coll Agr Sci, BR-18610307 Botucatu, SP, Brazil
[2] Mahatma Gandhi Univ, Dept Polymer Sci & Engn, Sch Chem Sci, Kottayam 686560, Kerala, India
[3] Bishop Moore Coll, Post Grad Dept Chem, Mavelikara 690110, Kerala, India
[4] Kalasalingam Univ, Ctr Nanotechnol, Virudunagar 626190, Tamil Nadu, India