[1] Karnatak Univ Dharwad, Dept Chem, Dharwad 580003, Karnataka, India
[2] Govt First Grade Coll, Dept Chem, Paschapur 571307, India
[3] Karnatak Univ Dharwad, Dept Phys, Laser Spect Programme, Dharwad 580003, Karnataka, India
[4] Univ Gothenberg, Dept Chem & Mol Biol, S-40530 Gothenburg, Sweden
[5] Commerce & SK Gubbi Sci Coll, Dept Chem, JSS Banashankari Arts, Dharwad 580004, Karnataka, India
[6] Anjuman Arts Sci & Commerce Coll, Dept Chem, Manugoli Rd, Vijayapur 586101, India
[7] SETs Coll Pharm, Dept Pharmaceut Chem, Dharwad 580002, Karnataka, India