1. Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012, United States
2. Chemistry Department, Faculty of Science, Fayoum University, Fayoum 63514, Egypt
3. Department of Physics, Florida A&M University, Tallahassee, Florida 32307, United States
4. National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States
5. Department of Chemistry & Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
6. Department of Physics, Florida State University, Tallahassee, Florida 32306, United States