The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
13C/19F high-resolution solid-state NMR was applied to examine local structures of a stage-1 layered carbon-fluorine compound (C2.8F). Four 19F (F1∼F4) and two 13C signals (C1 and C2) unraveled by high magnetic field (14 T) and fast magic-angle spinning (>35 kHz) were examined by various two-dimensional correlation experiments. In addition to “through space” 13C-19F and 19F-19F dipolar correlation,...
The preparation and application of new intercalation compounds of graphite oxide are reviewed. Graphite oxide was silylated with different silylating reagents such as alkyltrichlorosilane and 3-aminopropylethoxysilanes. After they were bidentately or monodentately attached to layers of graphite oxide, Si–OH groups which are available for further functionalization were introduced. When highly silylated...
Silylated graphite oxide thin films were reduced by UV light irradiation using a super high pressure Hg lamp at 95°C. The reduction of silylated graphite oxide was completed within 24h and a new pillared carbon with an interlayer spacing of 0.81nm was obtained. Pillared carbons with larger interlayer spacings of about 1.13nm were also obtained from graphite oxide silylated with octyltrichlorosilane...
Graphene layers with silica pillars which widen the interlayer distance and functionalize the space as micropores have been prepared as one of the new porous carbon materials. In this study, the silica-pillared graphene with Fe–N units as a catalytic active site for cathodic oxygen reduction was formed as a new type of carbonaceous noble-metal-free oxygen reduction catalysts with the ordered pore...
Thin films of graphite oxide silylated with octyltrichlorosilane were first prepared and they were further silylated with 3-aminopropyltriethoxysilane. Pillared carbon thin films with an interlayer spacing of 1.7nm were prepared from the pyrolysis of the resulting thin films. Larger propylene carbonate molecules were not intercalated into them. They showed selective electrical response to electron...
Pillared carbons were prepared from graphite oxide silylated by a two-step method using octyltrichlorosilane and then 3-aminopropylethoxysilane. When the second step reaction was performed at 110°C, larger amounts of silylating reagent reacted with the concurrent reduction of graphite oxide. Addition of water in the reaction system during the second step reaction accelerated the reaction at a lower...
Intercalation of various organic molecules into pillared carbon prepared from the pyrolysis of graphite oxide silylated with methyltrichlorosilane for three times was investigated. Liquid n-alkylamine molecules with various alkyl chain lengths were intercalated into the resulting pillared carbon and the interlayer spacing increased with increasing in the alkyl chain length, until it became a constant...
Thin films of silylated graphite oxide were obtained from a chloroform/cyclohexane dispersion of n-hexadecylamine-intercalated silylated graphite oxide by a casting method at a low temperature. Carbon-based thin films were obtained from the pyrolysis of the resulting films under a reduced pressure at 500°C or higher temperatures. The resulting samples were well adhered to the substrate because of...
Pillared carbon was obtained from graphite oxide silylated with alkyltrichlorosilanes with various alkyl chain lengths. The interlayer spacings of silylated graphite oxides became maximal when 1.1–1.5 molecules of bound silyl groups were attached per C 8 graphite oxide unit. Pillared carbon with an interlayer spacing of 1.27nm was obtained only when graphite oxide silylated with methyltrichlorosilane...
Pillared carbons were prepared by pyrolyzing various graphite oxides silylated by 3-aminopropylmethyldiethoxysilane. They were formed when silylated graphite oxides with silicon contents of 12.6% or higher were pyrolyzed in vacuo at 500–600°C. Their interlayer spacings were 1.23–1.31nm. When silylated graphite oxide was prepared at 90°C, the reductive decomposition of graphite oxide by amino groups...
Various n-alkylamine-intercalated graphite oxides were synthesized in the presence of a small amount of hexane and their compositions, chemical bonding and orientation of alkyl chains in them were characterized. The interlayer space of graphite oxide was saturated when about 11mmol/g of n-hexadecylamine was included in it. Three types of alkylamines in GO were identified in the resulting intercalation...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.