1. Department of Chemistry School of Chemical and Biotechnology SASTRA Deemed University Thanjavur Tamil Nadu 613 401 India
2. Present address: Inorganic Materials and Catalysis Division CSIR-Central Salt and Marine Chemicals Research Institute Bhavnagar Gujarat − 364 002 India.
3. Center for Green Chemistry Processes School of Chemistry Madurai Kamaraj University Madurai Tamil Nadu 625 021 India.