1. Department of Chemistry and Biochemistry, University of St. Thomas, Houston, Texas 77006, United States
2. Office of Research, University of Texas at Dallas, Richardson, Texas 75080, United States
3. Department of Chemistry and the Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, United States
4. Department of Electrical Engineering, Southern Methodist University, Dallas, Texas 75205, United States