1. Department of Chemistry, University of California, One Shields Ave, Davis, California 95616, United States
2. Department of Physics, Colorado School of Mines, 1500 Illinois St, Golden, Colorado 80401, United States
3. Department of Physics and Astronomy, University of California, One Shields Ave, Davis, California 95616, United States
4. Nuclear Magnetic Resonance Facility, University of California, One Shields Ave, Davis, California 95616, United States