[1]Research and Development Centre, Bharathiar University, Coimbatore, Tamil Nadu 641 046, India;
[2]Caplin Point Laboratories Limited, Chennai 600 017, India;
[3]PG and Research Department of Chemistry, Presidency College, Chennai 600 005, India;
[4]Department of Chemistry, Meenakshi Academy of Higher Education and Research, Chennai, Tamil Nadu 600 009, India;
[5]Department of Chemistry, Adhiyamaan College of Engineering, Hosur, Tamil Nadu 635 109, India;