1. TIFR Centre for Interdisciplinary Sciences, Tata Institute of Fundamental Research Hyderabad, Survey No. 36/P, Gopanpally, Ranga Reddy District, Hyderabad 500 107, India
2. NMR Science and Development Division, RIKEN SPring-8 Center, and Nano-Crystallography Unit, RIKEN-JEOL Collaboration Center, Yokohama, Kanagawa 230-0045, Japan
3. Physical Chemistry, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
4. JEOL Resonance, Inc., Musashino, Akishima, Tokyo 196-8558, Japan