1. Department
of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, United States
2. Department
of Chemistry, University of Wisconsin—Whitewater, 800 West Main Street, Whitewater, Wisconsin 53190-1790, United States
3. Department
of Chemistry, Midwestern State University, 3410 Taft Boulevard, Wichita Falls, Texas 76308, United States
4. Department
of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706-1322, United States
5. Molecular
Science Institute, School of Chemistry, University of the Witwatersrand, Johannesburg, Wits 2050, South Africa
6. Department
of Chemistry, Houston Baptist University, 7502 Fondren Road, Houston, Texas 77074-3298 United States