1. Department of Chemistry and Biochemistry, Shippensburg University, Shippensburg, Pennsylvania 17257, United States
2. Dipartimento di Scienze Matematiche, Fisiche e Informatiche, Università di Parma, 1-43124 Parma, Italy
3. Udr Parma, INSTM, 1-43124 Parma, Italy
4. Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States