[1] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA
[2] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA
[3] N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
[4] Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA
[5] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA