title: Synthesis and solid-state NMR structural characterization of 13C-labeled graphite oxide.
abstract: The detailed chemical structure of graphite oxide (GO), a layered material prepared from graphite almost 150 years ago and a precursor to chemically modified graphenes, has not been previously resolved because of the pseudo-random chemical functionalization of each layer, as well as variations in exact composition. Carbon-13 (13C) solid-state nuclear magnetic resonance (SSNMR) spectra of GO for natural abundance 13C have poor signal-to-noise ratios. Approximately 100% 13C-labeled graphite was made and converted to 13C-labeled GO, and 13C SSNMR was used to reveal details of the chemical bonding network, including the chemical groups and their connections. Carbon-13-labeled graphite can be used to prepare chemically modified graphenes for 13C SSNMR analysis with enhanced sensitivity and for fundamental studies of 13C-labeled graphite and graphene.
authors.affiliation: Department of Mechanical Engineering and the Texas Materials Institute, University of Texas at Austin, Austin, TX 78712, USA.
authors.forename: Weiwei
authors.initials: W
authors.lastname: Cai
authors.forename: Richard D
authors.initials: RD
authors.lastname: Piner
authors.forename: Frank J
authors.initials: FJ
authors.lastname: Stadermann
authors.forename: Sungjin
authors.initials: S
authors.lastname: Park
authors.forename: Medhat A
authors.initials: MA
authors.lastname: Shaibat
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Ishii
authors.forename: Dongxing
authors.initials: D
authors.lastname: Yang
authors.forename: Aruna
authors.initials: A
authors.lastname: Velamakanni
authors.forename: Sung Jin
authors.initials: SJ
authors.lastname: An
authors.forename: Meryl
authors.initials: M
authors.lastname: Stoller
authors.forename: Jinho
authors.initials: J
authors.lastname: An
authors.forename: Dongmin
authors.initials: D
authors.lastname: Chen
authors.forename: Rodney S
authors.initials: RS
authors.lastname: Ruoff