1. Department of Chemistry, University of Connecticut, Storrs, CT 06269-3060, USA
2. Department of Chemistry, Guru Nanak Dev University Amritsar, Punjab-143005, India
3. Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76706, USA
4. Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907-2084, USA