We thank Dr. Saman Shafaie for collecting high-resolution mass-spectrometric data, Dr. Amy A. Sarjeant and Charlotte Stern for solving the single-crystal X-ray structures, and Dr. Nicolaas A. Vermeulen, Dr. Andrew C. Sue, and Dr. Jianing Li for helpful discussions. The authors thank our joint collaborators Dr. Turki S. Al-Saud and Dr. Nezar H. Khdary from the King Abdulaziz City of Science and Technology (KACST) in Saudi Arabia for their interest in this research. M.R.W. is supported by the Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy, DOE, under grant no. DE-FG02-99ER-14999. S.T.S. thanks the International Institute for Nanotechnology (IIN) at Northwestern University (NU) for an IIN Postdoctoral Fellowship and the QUEST high-performance computing center at NU for a research allocation of computer time. M.F. was supported by the Non-Equilibrium Energy Research Center (NERC), which is an Energy Frontier Research Center (EFRC) funded by the U.S. Department of Energy, Office of Basic Energy Sciences (DOE-BES) under Award DE-SC0000989. Y.W. thanks the Fulbright Scholars Program for a Graduate Research Fellowship. D.M.G. was supported by the Department of Defense through the National Defense Science & Engineering Graduate Fellowship (NDSEG) Program. N.L.S. acknowledges the National Science Foundation (NSF) for a Graduate Research Fellowship.