1. Department
of Natural Sciences, Metropolitan State University, St. Paul, Minnesota 55106, United States
2. STEM
Education Center, University of Minnesota, St. Paul, Minnesota 55108, United States
3. Department
of Chemistry, University of Wisconsin—River Falls, River Falls, Wisconsin 54022, United States
4. Department
of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58102, United States