1. Department of Chemistry; University of Rajasthan; Jaipur 302004 India
2. M.L.V. Government P.G. College; Bhilwara Rajasthan India
3. Department of Chemistry; Central University of Rajasthan; Bandar Sindri, Kishangarh Ajmer Rajasthan India
4. Department of Chemistry and Chemical Sciences; Central University of Jammu; Jammu 180011 India