1. Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
2. Department of Humanities and Basic Sciences, Aditya Engineering College, Surampalem 533437, India
3. Jawaharlal Nehru Technological University, Kakinada 533003, India
4. Department of Chemistry, Andhra University, Visakhapatnam 530003, India