1. Department of Chemistry, University of Miami, Coral Gables, Florida 33146, USA
2. Department of Chemistry, Ball State University, Muncie, Indiana 47306, USA
3. Dr. J. T. Macdonald Foundation Biomedical Nanotechnology Institute, University of Miami, UM Life Science Technology Building, 1951 NW 7th Ave, Suite 475, Miami, Florida 33136, USA