1. Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721 302, West Bengal, India
2. Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore 632 014, Tamil Nadu, India
3. School of Mathematics, Biological, Exercise & Physical Sciences, San Diego Miramar College, San Diego, California 92126-2910, United States
4. Department of Chemistry and Biochemistry, San Diego State University, San Diego, California 92182-1030, United States