Acta Medica Okayama 0008-6223 49 12 2011 Analysis of bis(trifluoromethylsulfonyl)imide-doped paramagnetic graphite intercalation compound using F-19 very fast magic angle spinning nuclear magnetic resonance 4064 4066 EN Kazuma Gotoh Kazuyuki Takeda Michael M. Lerner Yoshimi Sueishi Shinpei Maruyama Atsushi Goto Masataka Tansho Shinobu Ohki Kenjiro Hashi Tadashi Shimizu Hiroyuki Ishida F atoms bonding to paramagnetic/conductive graphene layers in accepter-type graphite intercalation compounds (GICs) are analyzed using very fast magic angle spinning nuclear magnetic resonance, which is applied for the first time on F-19 nuclei to investigate paramagnetic materials. In the bis(trifluoromethylsulfonyl)imide(TFSI)-doped GIC, C-F bonds between fluorine atoms and graphene layers conform to a weak bonding of F to the graphene sheets. TFSI anions intercalated in the GIC do not show overall molecular motion; even at room temperature only the CF3 groups rotate. No potential conflict of interest relevant to this article was reported.