1. Advanced Imaging Research Center, University of Texas Southwestern Medical Center, 5325 Harry Hines Boulevard, Dallas, Texas 75235, Department of Chemistry, Portland State University, P.O. Box 751, Portland, Oregon 97207, Advanced Imaging Research Center, Oregon Health and Sciences University, 3181 S.W. Sam Jackson Park Road, L452, Portland, Oregon 97239, Department of Chemistry, University of Texas at Dallas, P.O. Box 830668, Richardson, Texas, 75083, and Departments of Chemical and Biomolecular...