1. Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, USA.
2. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley CA 94720, USA.
3. Lawrence Livermore National Laboratory, Livermore, CA 94550, USA.
4. Molecular Diamond Technologies, Chevron Technology Ventures, 100 Chevron Way, Richmond, CA 94802, USA.
5. Institut für Organische Chemie, Justus-Liebig University Giessen, Heinrich-Buff-Ring 58, 35392 Giessen, Germany.