1. Department of Chemistry and Biochemistry, Baylor University, Waco, Texas 76798, United States
2. Department of Chemistry and Biochemistry, Stephen F. Austin State University, Nacogdoches, Texas 75962, United States
3. Department of Chemistry, University of North Texas, Denton, Texas 76203, United States
4. Department of Chemistry, Lebanon Valley College, Annville, Pennsylvania 17003, United States